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??!function() {

  var d3 = {

    version: "3.4.9"

  };

  if (!Date.now) Date.now = function() {

    return +new Date();

  };

  var d3_arraySlice = [].slice, d3_array = function(list) {

    return d3_arraySlice.call(list);

  };

  var d3_document = document, d3_documentElement = d3_document.documentElement, d3_window = window;

  try {

    d3_array(d3_documentElement.childNodes)[0].nodeType;

  } catch (e) {

    d3_array = function(list) {

      var i = list.length, array = new Array(i);

      while (i--) array[i] = list[i];

      return array;

    };

  }

  try {

    d3_document.createElement("div").style.setProperty("opacity", 0, "");

  } catch (error) {

    var d3_element_prototype = d3_window.Element.prototype, d3_element_setAttribute = d3_element_prototype.setAttribute, d3_element_setAttributeNS = d3_element_prototype.setAttributeNS, d3_style_prototype = d3_window.CSSStyleDeclaration.prototype, d3_style_setProperty = d3_style_prototype.setProperty;

    d3_element_prototype.setAttribute = function(name, value) {

      d3_element_setAttribute.call(this, name, value + "");

    };

    d3_element_prototype.setAttributeNS = function(space, local, value) {

      d3_element_setAttributeNS.call(this, space, local, value + "");

    };

    d3_style_prototype.setProperty = function(name, value, priority) {

      d3_style_setProperty.call(this, name, value + "", priority);

    };

  }

  d3.ascending = d3_ascending;

  function d3_ascending(a, b) {

    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;

  }

  d3.descending = function(a, b) {

    return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;

  };

  d3.min = function(array, f) {

    var i = -1, n = array.length, a, b;

    if (arguments.length === 1) {

      while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined;

      while (++i < n) if ((b = array[i]) != null && a > b) a = b;

    } else {

      while (++i < n && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined;

      while (++i < n) if ((b = f.call(array, array[i], i)) != null && a > b) a = b;

    }

    return a;

  };

  d3.max = function(array, f) {

    var i = -1, n = array.length, a, b;

    if (arguments.length === 1) {

      while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined;

      while (++i < n) if ((b = array[i]) != null && b > a) a = b;

    } else {

      while (++i < n && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined;

      while (++i < n) if ((b = f.call(array, array[i], i)) != null && b > a) a = b;

    }

    return a;

  };

  d3.extent = function(array, f) {

    var i = -1, n = array.length, a, b, c;

    if (arguments.length === 1) {

      while (++i < n && !((a = c = array[i]) != null && a <= a)) a = c = undefined;

      while (++i < n) if ((b = array[i]) != null) {

        if (a > b) a = b;

        if (c < b) c = b;

      }

    } else {

      while (++i < n && !((a = c = f.call(array, array[i], i)) != null && a <= a)) a = undefined;

      while (++i < n) if ((b = f.call(array, array[i], i)) != null) {

        if (a > b) a = b;

        if (c < b) c = b;

      }

    }

    return [ a, c ];

  };

  d3.sum = function(array, f) {

    var s = 0, n = array.length, a, i = -1;

    if (arguments.length === 1) {

      while (++i < n) if (!isNaN(a = +array[i])) s += a;

    } else {

      while (++i < n) if (!isNaN(a = +f.call(array, array[i], i))) s += a;

    }

    return s;

  };

  function d3_number(x) {

    return x != null && !isNaN(x);

  }

  d3.mean = function(array, f) {

    var s = 0, n = array.length, a, i = -1, j = n;

    if (arguments.length === 1) {

      while (++i < n) if (d3_number(a = array[i])) s += a; else --j;

    } else {

      while (++i < n) if (d3_number(a = f.call(array, array[i], i))) s += a; else --j;

    }

    return j ? s / j : undefined;

  };

  d3.quantile = function(values, p) {

    var H = (values.length - 1) * p + 1, h = Math.floor(H), v = +values[h - 1], e = H - h;

    return e ? v + e * (values[h] - v) : v;

  };

  d3.median = function(array, f) {

    if (arguments.length > 1) array = array.map(f);

    array = array.filter(d3_number);

    return array.length ? d3.quantile(array.sort(d3_ascending), .5) : undefined;

  };

  function d3_bisector(compare) {

    return {

      left: function(a, x, lo, hi) {

        if (arguments.length < 3) lo = 0;

        if (arguments.length < 4) hi = a.length;

        while (lo < hi) {

          var mid = lo + hi >>> 1;

          if (compare(a[mid], x) < 0) lo = mid + 1; else hi = mid;

        }

        return lo;

      },

      right: function(a, x, lo, hi) {

        if (arguments.length < 3) lo = 0;

        if (arguments.length < 4) hi = a.length;

        while (lo < hi) {

          var mid = lo + hi >>> 1;

          if (compare(a[mid], x) > 0) hi = mid; else lo = mid + 1;

        }

        return lo;

      }

    };

  }

  var d3_bisect = d3_bisector(d3_ascending);

  d3.bisectLeft = d3_bisect.left;

  d3.bisect = d3.bisectRight = d3_bisect.right;

  d3.bisector = function(f) {

    return d3_bisector(f.length === 1 ? function(d, x) {

      return d3_ascending(f(d), x);

    } : f);

  };

  d3.shuffle = function(array) {

    var m = array.length, t, i;

    while (m) {

      i = Math.random() * m-- | 0;

      t = array[m], array[m] = array[i], array[i] = t;

    }

    return array;

  };

  d3.permute = function(array, indexes) {

    var i = indexes.length, permutes = new Array(i);

    while (i--) permutes[i] = array[indexes[i]];

    return permutes;

  };

  d3.pairs = function(array) {

    var i = 0, n = array.length - 1, p0, p1 = array[0], pairs = new Array(n < 0 ? 0 : n);

    while (i < n) pairs[i] = [ p0 = p1, p1 = array[++i] ];

    return pairs;

  };

  d3.zip = function() {

    if (!(n = arguments.length)) return [];

    for (var i = -1, m = d3.min(arguments, d3_zipLength), zips = new Array(m); ++i < m; ) {

      for (var j = -1, n, zip = zips[i] = new Array(n); ++j < n; ) {

        zip[j] = arguments[j][i];

      }

    }

    return zips;

  };

  function d3_zipLength(d) {

    return d.length;

  }

  d3.transpose = function(matrix) {

    return d3.zip.apply(d3, matrix);

  };

  d3.keys = function(map) {

    var keys = [];

    for (var key in map) keys.push(key);

    return keys;

  };

  d3.values = function(map) {

    var values = [];

    for (var key in map) values.push(map[key]);

    return values;

  };

  d3.entries = function(map) {

    var entries = [];

    for (var key in map) entries.push({

      key: key,

      value: map[key]

    });

    return entries;

  };

  d3.merge = function(arrays) {

    var n = arrays.length, m, i = -1, j = 0, merged, array;

    while (++i < n) j += arrays[i].length;

    merged = new Array(j);

    while (--n >= 0) {

      array = arrays[n];

      m = array.length;

      while (--m >= 0) {

        merged[--j] = array[m];

      }

    }

    return merged;

  };

  var abs = Math.abs;

  d3.range = function(start, stop, step) {

    if (arguments.length < 3) {

      step = 1;

      if (arguments.length < 2) {

        stop = start;

        start = 0;

      }

    }

    if ((stop - start) / step === Infinity) throw new Error("infinite range");

    var range = [], k = d3_range_integerScale(abs(step)), i = -1, j;

    start *= k, stop *= k, step *= k;

    if (step < 0) while ((j = start + step * ++i) > stop) range.push(j / k); else while ((j = start + step * ++i) < stop) range.push(j / k);

    return range;

  };

  function d3_range_integerScale(x) {

    var k = 1;

    while (x * k % 1) k *= 10;

    return k;

  }

  function d3_class(ctor, properties) {

    try {

      for (var key in properties) {

        Object.defineProperty(ctor.prototype, key, {

          value: properties[key],

          enumerable: false

        });

      }

    } catch (e) {

      ctor.prototype = properties;

    }

  }

  d3.map = function(object) {

    var map = new d3_Map();

    if (object instanceof d3_Map) object.forEach(function(key, value) {

      map.set(key, value);

    }); else for (var key in object) map.set(key, object[key]);

    return map;

  };

  function d3_Map() {}

  d3_class(d3_Map, {

    has: d3_map_has,

    get: function(key) {

      return this[d3_map_prefix + key];

    },

    set: function(key, value) {

      return this[d3_map_prefix + key] = value;

    },

    remove: d3_map_remove,

    keys: d3_map_keys,

    values: function() {

      var values = [];

      this.forEach(function(key, value) {

        values.push(value);

      });

      return values;

    },

    entries: function() {

      var entries = [];

      this.forEach(function(key, value) {

        entries.push({

          key: key,

          value: value

        });

      });

      return entries;

    },

    size: d3_map_size,

    empty: d3_map_empty,

    forEach: function(f) {

      for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) f.call(this, key.substring(1), this[key]);

    }

  });

  var d3_map_prefix = "\x00", d3_map_prefixCode = d3_map_prefix.charCodeAt(0);

  function d3_map_has(key) {

    return d3_map_prefix + key in this;

  }

  function d3_map_remove(key) {

    key = d3_map_prefix + key;

    return key in this && delete this[key];

  }

  function d3_map_keys() {

    var keys = [];

    this.forEach(function(key) {

      keys.push(key);

    });

    return keys;

  }

  function d3_map_size() {

    var size = 0;

    for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) ++size;

    return size;

  }

  function d3_map_empty() {

    for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) return false;

    return true;

  }

  d3.nest = function() {

    var nest = {}, keys = [], sortKeys = [], sortValues, rollup;

    function map(mapType, array, depth) {

      if (depth >= keys.length) return rollup ? rollup.call(nest, array) : sortValues ? array.sort(sortValues) : array;

      var i = -1, n = array.length, key = keys[depth++], keyValue, object, setter, valuesByKey = new d3_Map(), values;

      while (++i < n) {

        if (values = valuesByKey.get(keyValue = key(object = array[i]))) {

          values.push(object);

        } else {

          valuesByKey.set(keyValue, [ object ]);

        }

      }

      if (mapType) {

        object = mapType();

        setter = function(keyValue, values) {

          object.set(keyValue, map(mapType, values, depth));

        };

      } else {

        object = {};

        setter = function(keyValue, values) {

          object[keyValue] = map(mapType, values, depth);

        };

      }

      valuesByKey.forEach(setter);

      return object;

    }

    function entries(map, depth) {

      if (depth >= keys.length) return map;

      var array = [], sortKey = sortKeys[depth++];

      map.forEach(function(key, keyMap) {

        array.push({

          key: key,

          values: entries(keyMap, depth)

        });

      });

      return sortKey ? array.sort(function(a, b) {

        return sortKey(a.key, b.key);

      }) : array;

    }

    nest.map = function(array, mapType) {

      return map(mapType, array, 0);

    };

    nest.entries = function(array) {

      return entries(map(d3.map, array, 0), 0);

    };

    nest.key = function(d) {

      keys.push(d);

      return nest;

    };

    nest.sortKeys = function(order) {

      sortKeys[keys.length - 1] = order;

      return nest;

    };

    nest.sortValues = function(order) {

      sortValues = order;

      return nest;

    };

    nest.rollup = function(f) {

      rollup = f;

      return nest;

    };

    return nest;

  };

  d3.set = function(array) {

    var set = new d3_Set();

    if (array) for (var i = 0, n = array.length; i < n; ++i) set.add(array[i]);

    return set;

  };

  function d3_Set() {}

  d3_class(d3_Set, {

    has: d3_map_has,

    add: function(value) {

      this[d3_map_prefix + value] = true;

      return value;

    },

    remove: function(value) {

      value = d3_map_prefix + value;

      return value in this && delete this[value];

    },

    values: d3_map_keys,

    size: d3_map_size,

    empty: d3_map_empty,

    forEach: function(f) {

      for (var value in this) if (value.charCodeAt(0) === d3_map_prefixCode) f.call(this, value.substring(1));

    }

  });

  d3.behavior = {};

  d3.rebind = function(target, source) {

    var i = 1, n = arguments.length, method;

    while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);

    return target;

  };

  function d3_rebind(target, source, method) {

    return function() {

      var value = method.apply(source, arguments);

      return value === source ? target : value;

    };

  }

  function d3_vendorSymbol(object, name) {

    if (name in object) return name;

    name = name.charAt(0).toUpperCase() + name.substring(1);

    for (var i = 0, n = d3_vendorPrefixes.length; i < n; ++i) {

      var prefixName = d3_vendorPrefixes[i] + name;

      if (prefixName in object) return prefixName;

    }

  }

  var d3_vendorPrefixes = [ "webkit", "ms", "moz", "Moz", "o", "O" ];

  function d3_noop() {}

  d3.dispatch = function() {

    var dispatch = new d3_dispatch(), i = -1, n = arguments.length;

    while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);

    return dispatch;

  };

  function d3_dispatch() {}

  d3_dispatch.prototype.on = function(type, listener) {

    var i = type.indexOf("."), name = "";

    if (i >= 0) {

      name = type.substring(i + 1);

      type = type.substring(0, i);

    }

    if (type) return arguments.length < 2 ? this[type].on(name) : this[type].on(name, listener);

    if (arguments.length === 2) {

      if (listener == null) for (type in this) {

        if (this.hasOwnProperty(type)) this[type].on(name, null);

      }

      return this;

    }

  };

  function d3_dispatch_event(dispatch) {

    var listeners = [], listenerByName = new d3_Map();

    function event() {

      var z = listeners, i = -1, n = z.length, l;

      while (++i < n) if (l = z[i].on) l.apply(this, arguments);

      return dispatch;

    }

    event.on = function(name, listener) {

      var l = listenerByName.get(name), i;

      if (arguments.length < 2) return l && l.on;

      if (l) {

        l.on = null;

        listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));

        listenerByName.remove(name);

      }

      if (listener) listeners.push(listenerByName.set(name, {

        on: listener

      }));

      return dispatch;

    };

    return event;

  }

  d3.event = null;

  function d3_eventPreventDefault() {

    d3.event.preventDefault();

  }

  function d3_eventSource() {

    var e = d3.event, s;

    while (s = e.sourceEvent) e = s;

    return e;

  }

  function d3_eventDispatch(target) {

    var dispatch = new d3_dispatch(), i = 0, n = arguments.length;

    while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);

    dispatch.of = function(thiz, argumentz) {

      return function(e1) {

        try {

          var e0 = e1.sourceEvent = d3.event;

          e1.target = target;

          d3.event = e1;

          dispatch[e1.type].apply(thiz, argumentz);

        } finally {

          d3.event = e0;

        }

      };

    };

    return dispatch;

  }

  d3.requote = function(s) {

    return s.replace(d3_requote_re, "\\$&");

  };

  var d3_requote_re = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;

  var d3_subclass = {}.__proto__ ? function(object, prototype) {

    object.__proto__ = prototype;

  } : function(object, prototype) {

    for (var property in prototype) object[property] = prototype[property];

  };

  function d3_selection(groups) {

    d3_subclass(groups, d3_selectionPrototype);

    return groups;

  }

  var d3_select = function(s, n) {

    return n.querySelector(s);

  }, d3_selectAll = function(s, n) {

    return n.querySelectorAll(s);

  }, d3_selectMatcher = d3_documentElement.matches || d3_documentElement[d3_vendorSymbol(d3_documentElement, "matchesSelector")], d3_selectMatches = function(n, s) {

    return d3_selectMatcher.call(n, s);

  };

  if (typeof Sizzle === "function") {

    d3_select = function(s, n) {

      return Sizzle(s, n)[0] || null;

    };

    d3_selectAll = Sizzle;

    d3_selectMatches = Sizzle.matchesSelector;

  }

  d3.selection = function() {

    return d3_selectionRoot;

  };

  var d3_selectionPrototype = d3.selection.prototype = [];

  d3_selectionPrototype.select = function(selector) {

    var subgroups = [], subgroup, subnode, group, node;

    selector = d3_selection_selector(selector);

    for (var j = -1, m = this.length; ++j < m; ) {

      subgroups.push(subgroup = []);

      subgroup.parentNode = (group = this[j]).parentNode;

      for (var i = -1, n = group.length; ++i < n; ) {

        if (node = group[i]) {

          subgroup.push(subnode = selector.call(node, node.__data__, i, j));

          if (subnode && "__data__" in node) subnode.__data__ = node.__data__;

        } else {

          subgroup.push(null);

        }

      }

    }

    return d3_selection(subgroups);

  };

  function d3_selection_selector(selector) {

    return typeof selector === "function" ? selector : function() {

      return d3_select(selector, this);

    };

  }

  d3_selectionPrototype.selectAll = function(selector) {

    var subgroups = [], subgroup, node;

    selector = d3_selection_selectorAll(selector);

    for (var j = -1, m = this.length; ++j < m; ) {

      for (var group = this[j], i = -1, n = group.length; ++i < n; ) {

        if (node = group[i]) {

          subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i, j)));

          subgroup.parentNode = node;

        }

      }

    }

    return d3_selection(subgroups);

  };

  function d3_selection_selectorAll(selector) {

    return typeof selector === "function" ? selector : function() {

      return d3_selectAll(selector, this);

    };

  }

  var d3_nsPrefix = {

    svg: "http://www.w3.org/2000/svg",

    xhtml: "http://www.w3.org/1999/xhtml",

    xlink: "http://www.w3.org/1999/xlink",

    xml: "http://www.w3.org/XML/1998/namespace",

    xmlns: "http://www.w3.org/2000/xmlns/"

  };

  d3.ns = {

    prefix: d3_nsPrefix,

    qualify: function(name) {

      var i = name.indexOf(":"), prefix = name;

      if (i >= 0) {

        prefix = name.substring(0, i);

        name = name.substring(i + 1);

      }

      return d3_nsPrefix.hasOwnProperty(prefix) ? {

        space: d3_nsPrefix[prefix],

        local: name

      } : name;

    }

  };

  d3_selectionPrototype.attr = function(name, value) {

    if (arguments.length < 2) {

      if (typeof name === "string") {

        var node = this.node();

        name = d3.ns.qualify(name);

        return name.local ? node.getAttributeNS(name.space, name.local) : node.getAttribute(name);

      }

      for (value in name) this.each(d3_selection_attr(value, name[value]));

      return this;

    }

    return this.each(d3_selection_attr(name, value));

  };

  function d3_selection_attr(name, value) {

    name = d3.ns.qualify(name);

    function attrNull() {

      this.removeAttribute(name);

    }

    function attrNullNS() {

      this.removeAttributeNS(name.space, name.local);

    }

    function attrConstant() {

      this.setAttribute(name, value);

    }

    function attrConstantNS() {

      this.setAttributeNS(name.space, name.local, value);

    }

    function attrFunction() {

      var x = value.apply(this, arguments);

      if (x == null) this.removeAttribute(name); else this.setAttribute(name, x);

    }

    function attrFunctionNS() {

      var x = value.apply(this, arguments);

      if (x == null) this.removeAttributeNS(name.space, name.local); else this.setAttributeNS(name.space, name.local, x);

    }

    return value == null ? name.local ? attrNullNS : attrNull : typeof value === "function" ? name.local ? attrFunctionNS : attrFunction : name.local ? attrConstantNS : attrConstant;

  }

  function d3_collapse(s) {

    return s.trim().replace(/\s+/g, " ");

  }

  d3_selectionPrototype.classed = function(name, value) {

    if (arguments.length < 2) {

      if (typeof name === "string") {

        var node = this.node(), n = (name = d3_selection_classes(name)).length, i = -1;

        if (value = node.classList) {

          while (++i < n) if (!value.contains(name[i])) return false;

        } else {

          value = node.getAttribute("class");

          while (++i < n) if (!d3_selection_classedRe(name[i]).test(value)) return false;

        }

        return true;

      }

      for (value in name) this.each(d3_selection_classed(value, name[value]));

      return this;

    }

    return this.each(d3_selection_classed(name, value));

  };

  function d3_selection_classedRe(name) {

    return new RegExp("(?:^|\\s+)" + d3.requote(name) + "(?:\\s+|$)", "g");

  }

  function d3_selection_classes(name) {

    return (name + "").trim().split(/^|\s+/);

  }

  function d3_selection_classed(name, value) {

    name = d3_selection_classes(name).map(d3_selection_classedName);

    var n = name.length;

    function classedConstant() {

      var i = -1;

      while (++i < n) name[i](this, value);

    }

    function classedFunction() {

      var i = -1, x = value.apply(this, arguments);

      while (++i < n) name[i](this, x);

    }

    return typeof value === "function" ? classedFunction : classedConstant;

  }

  function d3_selection_classedName(name) {

    var re = d3_selection_classedRe(name);

    return function(node, value) {

      if (c = node.classList) return value ? c.add(name) : c.remove(name);

      var c = node.getAttribute("class") || "";

      if (value) {

        re.lastIndex = 0;

        if (!re.test(c)) node.setAttribute("class", d3_collapse(c + " " + name));

      } else {

        node.setAttribute("class", d3_collapse(c.replace(re, " ")));

      }

    };

  }

  d3_selectionPrototype.style = function(name, value, priority) {

    var n = arguments.length;

    if (n < 3) {

      if (typeof name !== "string") {

        if (n < 2) value = "";

        for (priority in name) this.each(d3_selection_style(priority, name[priority], value));

        return this;

      }

      if (n < 2) return d3_window.getComputedStyle(this.node(), null).getPropertyValue(name);

      priority = "";

    }

    return this.each(d3_selection_style(name, value, priority));

  };

  function d3_selection_style(name, value, priority) {

    function styleNull() {

      this.style.removeProperty(name);

    }

    function styleConstant() {

      this.style.setProperty(name, value, priority);

    }

    function styleFunction() {

      var x = value.apply(this, arguments);

      if (x == null) this.style.removeProperty(name); else this.style.setProperty(name, x, priority);

    }

    return value == null ? styleNull : typeof value === "function" ? styleFunction : styleConstant;

  }

  d3_selectionPrototype.property = function(name, value) {

    if (arguments.length < 2) {

      if (typeof name === "string") return this.node()[name];

      for (value in name) this.each(d3_selection_property(value, name[value]));

      return this;

    }

    return this.each(d3_selection_property(name, value));

  };

  function d3_selection_property(name, value) {

    function propertyNull() {

      delete this[name];

    }

    function propertyConstant() {

      this[name] = value;

    }

    function propertyFunction() {

      var x = value.apply(this, arguments);

      if (x == null) delete this[name]; else this[name] = x;

    }

    return value == null ? propertyNull : typeof value === "function" ? propertyFunction : propertyConstant;

  }

  d3_selectionPrototype.text = function(value) {

    return arguments.length ? this.each(typeof value === "function" ? function() {

      var v = value.apply(this, arguments);

      this.textContent = v == null ? "" : v;

    } : value == null ? function() {

      this.textContent = "";

    } : function() {

      this.textContent = value;

    }) : this.node().textContent;

  };

  d3_selectionPrototype.html = function(value) {

    return arguments.length ? this.each(typeof value === "function" ? function() {

      var v = value.apply(this, arguments);

      this.innerHTML = v == null ? "" : v;

    } : value == null ? function() {

      this.innerHTML = "";

    } : function() {

      this.innerHTML = value;

    }) : this.node().innerHTML;

  };

  d3_selectionPrototype.append = function(name) {

    name = d3_selection_creator(name);

    return this.select(function() {

      return this.appendChild(name.apply(this, arguments));

    });

  };

  function d3_selection_creator(name) {

    return typeof name === "function" ? name : (name = d3.ns.qualify(name)).local ? function() {

      return this.ownerDocument.createElementNS(name.space, name.local);

    } : function() {

      return this.ownerDocument.createElementNS(this.namespaceURI, name);

    };

  }

  d3_selectionPrototype.insert = function(name, before) {

    name = d3_selection_creator(name);

    before = d3_selection_selector(before);

    return this.select(function() {

      return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);

    });

  };

  d3_selectionPrototype.remove = function() {

    return this.each(function() {

      var parent = this.parentNode;

      if (parent) parent.removeChild(this);

    });

  };

  d3_selectionPrototype.data = function(value, key) {

    var i = -1, n = this.length, group, node;

    if (!arguments.length) {

      value = new Array(n = (group = this[0]).length);

      while (++i < n) {

        if (node = group[i]) {

          value[i] = node.__data__;

        }

      }

      return value;

    }

    function bind(group, groupData) {

      var i, n = group.length, m = groupData.length, n0 = Math.min(n, m), updateNodes = new Array(m), enterNodes = new Array(m), exitNodes = new Array(n), node, nodeData;

      if (key) {

        var nodeByKeyValue = new d3_Map(), dataByKeyValue = new d3_Map(), keyValues = [], keyValue;

        for (i = -1; ++i < n; ) {

          keyValue = key.call(node = group[i], node.__data__, i);

          if (nodeByKeyValue.has(keyValue)) {

            exitNodes[i] = node;

          } else {

            nodeByKeyValue.set(keyValue, node);

          }

          keyValues.push(keyValue);

        }

        for (i = -1; ++i < m; ) {

          keyValue = key.call(groupData, nodeData = groupData[i], i);

          if (node = nodeByKeyValue.get(keyValue)) {

            updateNodes[i] = node;

            node.__data__ = nodeData;

          } else if (!dataByKeyValue.has(keyValue)) {

            enterNodes[i] = d3_selection_dataNode(nodeData);

          }

          dataByKeyValue.set(keyValue, nodeData);

          nodeByKeyValue.remove(keyValue);

        }

        for (i = -1; ++i < n; ) {

          if (nodeByKeyValue.has(keyValues[i])) {

            exitNodes[i] = group[i];

          }

        }

      } else {

        for (i = -1; ++i < n0; ) {

          node = group[i];

          nodeData = groupData[i];

          if (node) {

            node.__data__ = nodeData;

            updateNodes[i] = node;

          } else {

            enterNodes[i] = d3_selection_dataNode(nodeData);

          }

        }

        for (;i < m; ++i) {

          enterNodes[i] = d3_selection_dataNode(groupData[i]);

        }

        for (;i < n; ++i) {

          exitNodes[i] = group[i];

        }

      }

      enterNodes.update = updateNodes;

      enterNodes.parentNode = updateNodes.parentNode = exitNodes.parentNode = group.parentNode;

      enter.push(enterNodes);

      update.push(updateNodes);

      exit.push(exitNodes);

    }

    var enter = d3_selection_enter([]), update = d3_selection([]), exit = d3_selection([]);

    if (typeof value === "function") {

      while (++i < n) {

        bind(group = this[i], value.call(group, group.parentNode.__data__, i));

      }

    } else {

      while (++i < n) {

        bind(group = this[i], value);

      }

    }

    update.enter = function() {

      return enter;

    };

    update.exit = function() {

      return exit;

    };

    return update;

  };

  function d3_selection_dataNode(data) {

    return {

      __data__: data

    };

  }

  d3_selectionPrototype.datum = function(value) {

    return arguments.length ? this.property("__data__", value) : this.property("__data__");

  };

  d3_selectionPrototype.filter = function(filter) {

    var subgroups = [], subgroup, group, node;

    if (typeof filter !== "function") filter = d3_selection_filter(filter);

    for (var j = 0, m = this.length; j < m; j++) {

      subgroups.push(subgroup = []);

      subgroup.parentNode = (group = this[j]).parentNode;

      for (var i = 0, n = group.length; i < n; i++) {

        if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {

          subgroup.push(node);

        }

      }

    }

    return d3_selection(subgroups);

  };

  function d3_selection_filter(selector) {

    return function() {

      return d3_selectMatches(this, selector);

    };

  }

  d3_selectionPrototype.order = function() {

    for (var j = -1, m = this.length; ++j < m; ) {

      for (var group = this[j], i = group.length - 1, next = group[i], node; --i >= 0; ) {

        if (node = group[i]) {

          if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);

          next = node;

        }

      }

    }

    return this;

  };

  d3_selectionPrototype.sort = function(comparator) {

    comparator = d3_selection_sortComparator.apply(this, arguments);

    for (var j = -1, m = this.length; ++j < m; ) this[j].sort(comparator);

    return this.order();

  };

  function d3_selection_sortComparator(comparator) {

    if (!arguments.length) comparator = d3_ascending;

    return function(a, b) {

      return a && b ? comparator(a.__data__, b.__data__) : !a - !b;

    };

  }

  d3_selectionPrototype.each = function(callback) {

    return d3_selection_each(this, function(node, i, j) {

      callback.call(node, node.__data__, i, j);

    });

  };

  function d3_selection_each(groups, callback) {

    for (var j = 0, m = groups.length; j < m; j++) {

      for (var group = groups[j], i = 0, n = group.length, node; i < n; i++) {

        if (node = group[i]) callback(node, i, j);

      }

    }

    return groups;

  }

  d3_selectionPrototype.call = function(callback) {

    var args = d3_array(arguments);

    callback.apply(args[0] = this, args);

    return this;

  };

  d3_selectionPrototype.empty = function() {

    return !this.node();

  };

  d3_selectionPrototype.node = function() {

    for (var j = 0, m = this.length; j < m; j++) {

      for (var group = this[j], i = 0, n = group.length; i < n; i++) {

        var node = group[i];

        if (node) return node;

      }

    }

    return null;

  };

  d3_selectionPrototype.size = function() {

    var n = 0;

    this.each(function() {

      ++n;

    });

    return n;

  };

  function d3_selection_enter(selection) {

    d3_subclass(selection, d3_selection_enterPrototype);

    return selection;

  }

  var d3_selection_enterPrototype = [];

  d3.selection.enter = d3_selection_enter;

  d3.selection.enter.prototype = d3_selection_enterPrototype;

  d3_selection_enterPrototype.append = d3_selectionPrototype.append;

  d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;

  d3_selection_enterPrototype.node = d3_selectionPrototype.node;

  d3_selection_enterPrototype.call = d3_selectionPrototype.call;

  d3_selection_enterPrototype.size = d3_selectionPrototype.size;

  d3_selection_enterPrototype.select = function(selector) {

    var subgroups = [], subgroup, subnode, upgroup, group, node;

    for (var j = -1, m = this.length; ++j < m; ) {

      upgroup = (group = this[j]).update;

      subgroups.push(subgroup = []);

      subgroup.parentNode = group.parentNode;

      for (var i = -1, n = group.length; ++i < n; ) {

        if (node = group[i]) {

          subgroup.push(upgroup[i] = subnode = selector.call(group.parentNode, node.__data__, i, j));

          subnode.__data__ = node.__data__;

        } else {

          subgroup.push(null);

        }

      }

    }

    return d3_selection(subgroups);

  };

  d3_selection_enterPrototype.insert = function(name, before) {

    if (arguments.length < 2) before = d3_selection_enterInsertBefore(this);

    return d3_selectionPrototype.insert.call(this, name, before);

  };

  function d3_selection_enterInsertBefore(enter) {

    var i0, j0;

    return function(d, i, j) {

      var group = enter[j].update, n = group.length, node;

      if (j != j0) j0 = j, i0 = 0;

      if (i >= i0) i0 = i + 1;

      while (!(node = group[i0]) && ++i0 < n) ;

      return node;

    };

  }

  d3_selectionPrototype.transition = function() {

    var id = d3_transitionInheritId || ++d3_transitionId, subgroups = [], subgroup, node, transition = d3_transitionInherit || {

      time: Date.now(),

      ease: d3_ease_cubicInOut,

      delay: 0,

      duration: 250

    };

    for (var j = -1, m = this.length; ++j < m; ) {

      subgroups.push(subgroup = []);

      for (var group = this[j], i = -1, n = group.length; ++i < n; ) {

        if (node = group[i]) d3_transitionNode(node, i, id, transition);

        subgroup.push(node);

      }

    }

    return d3_transition(subgroups, id);

  };

  d3_selectionPrototype.interrupt = function() {

    return this.each(d3_selection_interrupt);

  };

  function d3_selection_interrupt() {

    var lock = this.__transition__;

    if (lock) ++lock.active;

  }

  d3.select = function(node) {

    var group = [ typeof node === "string" ? d3_select(node, d3_document) : node ];

    group.parentNode = d3_documentElement;

    return d3_selection([ group ]);

  };

  d3.selectAll = function(nodes) {

    var group = d3_array(typeof nodes === "string" ? d3_selectAll(nodes, d3_document) : nodes);

    group.parentNode = d3_documentElement;

    return d3_selection([ group ]);

  };

  var d3_selectionRoot = d3.select(d3_documentElement);

  d3_selectionPrototype.on = function(type, listener, capture) {

    var n = arguments.length;

    if (n < 3) {

      if (typeof type !== "string") {

        if (n < 2) listener = false;

        for (capture in type) this.each(d3_selection_on(capture, type[capture], listener));

        return this;

      }

      if (n < 2) return (n = this.node()["__on" + type]) && n._;

      capture = false;

    }

    return this.each(d3_selection_on(type, listener, capture));

  };

  function d3_selection_on(type, listener, capture) {

    var name = "__on" + type, i = type.indexOf("."), wrap = d3_selection_onListener;

    if (i > 0) type = type.substring(0, i);

    var filter = d3_selection_onFilters.get(type);

    if (filter) type = filter, wrap = d3_selection_onFilter;

    function onRemove() {

      var l = this[name];

      if (l) {

        this.removeEventListener(type, l, l.$);

        delete this[name];

      }

    }

    function onAdd() {

      var l = wrap(listener, d3_array(arguments));

      onRemove.call(this);

      this.addEventListener(type, this[name] = l, l.$ = capture);

      l._ = listener;

    }

    function removeAll() {

      var re = new RegExp("^__on([^.]+)" + d3.requote(type) + "$"), match;

      for (var name in this) {

        if (match = name.match(re)) {

          var l = this[name];

          this.removeEventListener(match[1], l, l.$);

          delete this[name];

        }

      }

    }

    return i ? listener ? onAdd : onRemove : listener ? d3_noop : removeAll;

  }

  var d3_selection_onFilters = d3.map({

    mouseenter: "mouseover",

    mouseleave: "mouseout"

  });

  d3_selection_onFilters.forEach(function(k) {

    if ("on" + k in d3_document) d3_selection_onFilters.remove(k);

  });

  function d3_selection_onListener(listener, argumentz) {

    return function(e) {

      var o = d3.event;

      d3.event = e;

      argumentz[0] = this.__data__;

      try {

        listener.apply(this, argumentz);

      } finally {

        d3.event = o;

      }

    };

  }

  function d3_selection_onFilter(listener, argumentz) {

    var l = d3_selection_onListener(listener, argumentz);

    return function(e) {

      var target = this, related = e.relatedTarget;

      if (!related || related !== target && !(related.compareDocumentPosition(target) & 8)) {

        l.call(target, e);

      }

    };

  }

  var d3_event_dragSelect = "onselectstart" in d3_document ? null : d3_vendorSymbol(d3_documentElement.style, "userSelect"), d3_event_dragId = 0;

  function d3_event_dragSuppress() {

    var name = ".dragsuppress-" + ++d3_event_dragId, click = "click" + name, w = d3.select(d3_window).on("touchmove" + name, d3_eventPreventDefault).on("dragstart" + name, d3_eventPreventDefault).on("selectstart" + name, d3_eventPreventDefault);

    if (d3_event_dragSelect) {

      var style = d3_documentElement.style, select = style[d3_event_dragSelect];

      style[d3_event_dragSelect] = "none";

    }

    return function(suppressClick) {

      w.on(name, null);

      if (d3_event_dragSelect) style[d3_event_dragSelect] = select;

      if (suppressClick) {

        function off() {

          w.on(click, null);

        }

        w.on(click, function() {

          d3_eventPreventDefault();

          off();

        }, true);

        setTimeout(off, 0);

      }

    };

  }

  d3.mouse = function(container) {

    return d3_mousePoint(container, d3_eventSource());

  };

  var d3_mouse_bug44083 = /WebKit/.test(d3_window.navigator.userAgent) ? -1 : 0;

  function d3_mousePoint(container, e) {

    if (e.changedTouches) e = e.changedTouches[0];

    var svg = container.ownerSVGElement || container;

    if (svg.createSVGPoint) {

      var point = svg.createSVGPoint();

      if (d3_mouse_bug44083 < 0 && (d3_window.scrollX || d3_window.scrollY)) {

        svg = d3.select("body").append("svg").style({

          position: "absolute",

          top: 0,

          left: 0,

          margin: 0,

          padding: 0,

          border: "none"

        }, "important");

        var ctm = svg[0][0].getScreenCTM();

        d3_mouse_bug44083 = !(ctm.f || ctm.e);

        svg.remove();

      }

      if (d3_mouse_bug44083) point.x = e.pageX, point.y = e.pageY; else point.x = e.clientX,

      point.y = e.clientY;

      point = point.matrixTransform(container.getScreenCTM().inverse());

      return [ point.x, point.y ];

    }

    var rect = container.getBoundingClientRect();

    return [ e.clientX - rect.left - container.clientLeft, e.clientY - rect.top - container.clientTop ];

  }

  d3.touches = function(container, touches) {

    if (arguments.length < 2) touches = d3_eventSource().touches;

    return touches ? d3_array(touches).map(function(touch) {

      var point = d3_mousePoint(container, touch);

      point.identifier = touch.identifier;

      return point;

    }) : [];

  };

  d3.behavior.drag = function() {

    var event = d3_eventDispatch(drag, "drag", "dragstart", "dragend"), origin = null, mousedown = dragstart(d3_noop, d3.mouse, d3_behavior_dragMouseSubject, "mousemove", "mouseup"), touchstart = dragstart(d3_behavior_dragTouchId, d3.touch, d3_behavior_dragTouchSubject, "touchmove", "touchend");

    function drag() {

      this.on("mousedown.drag", mousedown).on("touchstart.drag", touchstart);

    }

    function dragstart(id, position, subject, move, end) {

      return function() {

        var that = this, target = d3.event.target, parent = that.parentNode, dispatch = event.of(that, arguments), dragged = 0, dragId = id(), dragName = ".drag" + (dragId == null ? "" : "-" + dragId), dragOffset, dragSubject = d3.select(subject()).on(move + dragName, moved).on(end + dragName, ended), dragRestore = d3_event_dragSuppress(), position0 = position(parent, dragId);

        if (origin) {

          dragOffset = origin.apply(that, arguments);

          dragOffset = [ dragOffset.x - position0[0], dragOffset.y - position0[1] ];

        } else {

          dragOffset = [ 0, 0 ];

        }

        dispatch({

          type: "dragstart"

        });

        function moved() {

          var position1 = position(parent, dragId), dx, dy;

          if (!position1) return;

          dx = position1[0] - position0[0];

          dy = position1[1] - position0[1];

          dragged |= dx | dy;

          position0 = position1;

          dispatch({

            type: "drag",

            x: position1[0] + dragOffset[0],

            y: position1[1] + dragOffset[1],

            dx: dx,

            dy: dy

          });

        }

        function ended() {

          if (!position(parent, dragId)) return;

          dragSubject.on(move + dragName, null).on(end + dragName, null);

          dragRestore(dragged && d3.event.target === target);

          dispatch({

            type: "dragend"

          });

        }

      };

    }

    drag.origin = function(x) {

      if (!arguments.length) return origin;

      origin = x;

      return drag;

    };

    return d3.rebind(drag, event, "on");

  };

  function d3_behavior_dragTouchId() {

    return d3.event.changedTouches[0].identifier;

  }

  function d3_behavior_dragTouchSubject() {

    return d3.event.target;

  }

  function d3_behavior_dragMouseSubject() {

    return d3_window;

  }

  var ? = Math.PI, ? = 2 * ?, half? = ? / 2, ? = 1e-6, ?2 = ? * ?, d3_radians = ? / 180, d3_degrees = 180 / ?;

  function d3_sgn(x) {

    return x > 0 ? 1 : x < 0 ? -1 : 0;

  }

  function d3_cross2d(a, b, c) {

    return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);

  }

  function d3_acos(x) {

    return x > 1 ? 0 : x < -1 ? ? : Math.acos(x);

  }

  function d3_asin(x) {

    return x > 1 ? half? : x < -1 ? -half? : Math.asin(x);

  }

  function d3_sinh(x) {

    return ((x = Math.exp(x)) - 1 / x) / 2;

  }

  function d3_cosh(x) {

    return ((x = Math.exp(x)) + 1 / x) / 2;

  }

  function d3_tanh(x) {

    return ((x = Math.exp(2 * x)) - 1) / (x + 1);

  }

  function d3_haversin(x) {

    return (x = Math.sin(x / 2)) * x;

  }

  var ? = Math.SQRT2, ?2 = 2, ?4 = 4;

  d3.interpolateZoom = function(p0, p1) {

    var ux0 = p0[0], uy0 = p0[1], w0 = p0[2], ux1 = p1[0], uy1 = p1[1], w1 = p1[2];

    var dx = ux1 - ux0, dy = uy1 - uy0, d2 = dx * dx + dy * dy, d1 = Math.sqrt(d2), b0 = (w1 * w1 - w0 * w0 + ?4 * d2) / (2 * w0 * ?2 * d1), b1 = (w1 * w1 - w0 * w0 - ?4 * d2) / (2 * w1 * ?2 * d1), r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0), r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1), dr = r1 - r0, S = (dr || Math.log(w1 / w0)) / ?;

    function interpolate(t) {

      var s = t * S;

      if (dr) {

        var coshr0 = d3_cosh(r0), u = w0 / (?2 * d1) * (coshr0 * d3_tanh(? * s + r0) - d3_sinh(r0));

        return [ ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / d3_cosh(? * s + r0) ];

      }

      return [ ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(? * s) ];

    }

    interpolate.duration = S * 1e3;

    return interpolate;

  };

  d3.behavior.zoom = function() {

    var view = {

      x: 0,

      y: 0,

      k: 1

    }, translate0, center, size = [ 960, 500 ], scaleExtent = d3_behavior_zoomInfinity, mousedown = "mousedown.zoom", mousemove = "mousemove.zoom", mouseup = "mouseup.zoom", mousewheelTimer, touchstart = "touchstart.zoom", touchtime, event = d3_eventDispatch(zoom, "zoomstart", "zoom", "zoomend"), x0, x1, y0, y1;

    function zoom(g) {

      g.on(mousedown, mousedowned).on(d3_behavior_zoomWheel + ".zoom", mousewheeled).on(mousemove, mousewheelreset).on("dblclick.zoom", dblclicked).on(touchstart, touchstarted);

    }

    zoom.event = function(g) {

      g.each(function() {

        var dispatch = event.of(this, arguments), view1 = view;

        if (d3_transitionInheritId) {

          d3.select(this).transition().each("start.zoom", function() {

            view = this.__chart__ || {

              x: 0,

              y: 0,

              k: 1

            };

            zoomstarted(dispatch);

          }).tween("zoom:zoom", function() {

            var dx = size[0], dy = size[1], cx = dx / 2, cy = dy / 2, i = d3.interpolateZoom([ (cx - view.x) / view.k, (cy - view.y) / view.k, dx / view.k ], [ (cx - view1.x) / view1.k, (cy - view1.y) / view1.k, dx / view1.k ]);

            return function(t) {

              var l = i(t), k = dx / l[2];

              this.__chart__ = view = {

                x: cx - l[0] * k,

                y: cy - l[1] * k,

                k: k

              };

              zoomed(dispatch);

            };

          }).each("end.zoom", function() {

            zoomended(dispatch);

          });

        } else {

          this.__chart__ = view;

          zoomstarted(dispatch);

          zoomed(dispatch);

          zoomended(dispatch);

        }

      });

    };

    zoom.translate = function(_) {

      if (!arguments.length) return [ view.x, view.y ];

      view = {

        x: +_[0],

        y: +_[1],

        k: view.k

      };

      rescale();

      return zoom;

    };

    zoom.scale = function(_) {

      if (!arguments.length) return view.k;

      view = {

        x: view.x,

        y: view.y,

        k: +_

      };

      rescale();

      return zoom;

    };

    zoom.scaleExtent = function(_) {

      if (!arguments.length) return scaleExtent;

      scaleExtent = _ == null ? d3_behavior_zoomInfinity : [ +_[0], +_[1] ];

      return zoom;

    };

    zoom.center = function(_) {

      if (!arguments.length) return center;

      center = _ && [ +_[0], +_[1] ];

      return zoom;

    };

    zoom.size = function(_) {

      if (!arguments.length) return size;

      size = _ && [ +_[0], +_[1] ];

      return zoom;

    };

    zoom.x = function(z) {

      if (!arguments.length) return x1;

      x1 = z;

      x0 = z.copy();

      view = {

        x: 0,

        y: 0,

        k: 1

      };

      return zoom;

    };

    zoom.y = function(z) {

      if (!arguments.length) return y1;

      y1 = z;

      y0 = z.copy();

      view = {

        x: 0,

        y: 0,

        k: 1

      };

      return zoom;

    };

    function location(p) {

      return [ (p[0] - view.x) / view.k, (p[1] - view.y) / view.k ];

    }

    function point(l) {

      return [ l[0] * view.k + view.x, l[1] * view.k + view.y ];

    }

    function scaleTo(s) {

      view.k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s));

    }

    function translateTo(p, l) {

      l = point(l);

      view.x += p[0] - l[0];

      view.y += p[1] - l[1];

    }

    function rescale() {

      if (x1) x1.domain(x0.range().map(function(x) {

        return (x - view.x) / view.k;

      }).map(x0.invert));

      if (y1) y1.domain(y0.range().map(function(y) {

        return (y - view.y) / view.k;

      }).map(y0.invert));

    }

    function zoomstarted(dispatch) {

      dispatch({

        type: "zoomstart"

      });

    }

    function zoomed(dispatch) {

      rescale();

      dispatch({

        type: "zoom",

        scale: view.k,

        translate: [ view.x, view.y ]

      });

    }

    function zoomended(dispatch) {

      dispatch({

        type: "zoomend"

      });

    }

    function mousedowned() {

      var that = this, target = d3.event.target, dispatch = event.of(that, arguments), dragged = 0, subject = d3.select(d3_window).on(mousemove, moved).on(mouseup, ended), location0 = location(d3.mouse(that)), dragRestore = d3_event_dragSuppress();

      d3_selection_interrupt.call(that);

      zoomstarted(dispatch);

      function moved() {

        dragged = 1;

        translateTo(d3.mouse(that), location0);

        zoomed(dispatch);

      }

      function ended() {

        subject.on(mousemove, d3_window === that ? mousewheelreset : null).on(mouseup, null);

        dragRestore(dragged && d3.event.target === target);

        zoomended(dispatch);

      }

    }

    function touchstarted() {

      var that = this, dispatch = event.of(that, arguments), locations0 = {}, distance0 = 0, scale0, zoomName = ".zoom-" + d3.event.changedTouches[0].identifier, touchmove = "touchmove" + zoomName, touchend = "touchend" + zoomName, targets = [], subject = d3.select(that).on(mousedown, null).on(touchstart, started), dragRestore = d3_event_dragSuppress();

      d3_selection_interrupt.call(that);

      started();

      zoomstarted(dispatch);

      function relocate() {

        var touches = d3.touches(that);

        scale0 = view.k;

        touches.forEach(function(t) {

          if (t.identifier in locations0) locations0[t.identifier] = location(t);

        });

        return touches;

      }

      function started() {

        var target = d3.event.target;

        d3.select(target).on(touchmove, moved).on(touchend, ended);

        targets.push(target);

        var changed = d3.event.changedTouches;

        for (var i = 0, n = changed.length; i < n; ++i) {

          locations0[changed[i].identifier] = null;

        }

        var touches = relocate(), now = Date.now();

        if (touches.length === 1) {

          if (now - touchtime < 500) {

            var p = touches[0], l = locations0[p.identifier];

            scaleTo(view.k * 2);

            translateTo(p, l);

            d3_eventPreventDefault();

            zoomed(dispatch);

          }

          touchtime = now;

        } else if (touches.length > 1) {

          var p = touches[0], q = touches[1], dx = p[0] - q[0], dy = p[1] - q[1];

          distance0 = dx * dx + dy * dy;

        }

      }

      function moved() {

        var touches = d3.touches(that), p0, l0, p1, l1;

        for (var i = 0, n = touches.length; i < n; ++i, l1 = null) {

          p1 = touches[i];

          if (l1 = locations0[p1.identifier]) {

            if (l0) break;

            p0 = p1, l0 = l1;

          }

        }

        if (l1) {

          var distance1 = (distance1 = p1[0] - p0[0]) * distance1 + (distance1 = p1[1] - p0[1]) * distance1, scale1 = distance0 && Math.sqrt(distance1 / distance0);

          p0 = [ (p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2 ];

          l0 = [ (l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2 ];

          scaleTo(scale1 * scale0);

        }

        touchtime = null;

        translateTo(p0, l0);

        zoomed(dispatch);

      }

      function ended() {

        if (d3.event.touches.length) {

          var changed = d3.event.changedTouches;

          for (var i = 0, n = changed.length; i < n; ++i) {

            delete locations0[changed[i].identifier];

          }

          for (var identifier in locations0) {

            return void relocate();

          }

        }

        d3.selectAll(targets).on(zoomName, null);

        subject.on(mousedown, mousedowned).on(touchstart, touchstarted);

        dragRestore();

        zoomended(dispatch);

      }

    }

    function mousewheeled() {

      var dispatch = event.of(this, arguments);

      if (mousewheelTimer) clearTimeout(mousewheelTimer); else d3_selection_interrupt.call(this),

      zoomstarted(dispatch);

      mousewheelTimer = setTimeout(function() {

        mousewheelTimer = null;

        zoomended(dispatch);

      }, 50);

      d3_eventPreventDefault();

      var point = center || d3.mouse(this);

      if (!translate0) translate0 = location(point);

      scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * view.k);

      translateTo(point, translate0);

      zoomed(dispatch);

    }

    function mousewheelreset() {

      translate0 = null;

    }

    function dblclicked() {

      var dispatch = event.of(this, arguments), p = d3.mouse(this), l = location(p), k = Math.log(view.k) / Math.LN2;

      zoomstarted(dispatch);

      scaleTo(Math.pow(2, d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1));

      translateTo(p, l);

      zoomed(dispatch);

      zoomended(dispatch);

    }

    return d3.rebind(zoom, event, "on");

  };

  var d3_behavior_zoomInfinity = [ 0, Infinity ];

  var d3_behavior_zoomDelta, d3_behavior_zoomWheel = "onwheel" in d3_document ? (d3_behavior_zoomDelta = function() {

    return -d3.event.deltaY * (d3.event.deltaMode ? 120 : 1);

  }, "wheel") : "onmousewheel" in d3_document ? (d3_behavior_zoomDelta = function() {

    return d3.event.wheelDelta;

  }, "mousewheel") : (d3_behavior_zoomDelta = function() {

    return -d3.event.detail;

  }, "MozMousePixelScroll");

  d3.color = d3_color;

  function d3_color() {}

  d3_color.prototype.toString = function() {

    return this.rgb() + "";

  };

  d3.hsl = d3_hsl;

  function d3_hsl(h, s, l) {

    return this instanceof d3_hsl ? void (this.h = +h, this.s = +s, this.l = +l) : arguments.length < 2 ? h instanceof d3_hsl ? new d3_hsl(h.h, h.s, h.l) : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl) : new d3_hsl(h, s, l);

  }

  var d3_hslPrototype = d3_hsl.prototype = new d3_color();

  d3_hslPrototype.brighter = function(k) {

    k = Math.pow(.7, arguments.length ? k : 1);

    return new d3_hsl(this.h, this.s, this.l / k);

  };

  d3_hslPrototype.darker = function(k) {

    k = Math.pow(.7, arguments.length ? k : 1);

    return new d3_hsl(this.h, this.s, k * this.l);

  };

  d3_hslPrototype.rgb = function() {

    return d3_hsl_rgb(this.h, this.s, this.l);

  };

  function d3_hsl_rgb(h, s, l) {

    var m1, m2;

    h = isNaN(h) ? 0 : (h %= 360) < 0 ? h + 360 : h;

    s = isNaN(s) ? 0 : s < 0 ? 0 : s > 1 ? 1 : s;

    l = l < 0 ? 0 : l > 1 ? 1 : l;

    m2 = l <= .5 ? l * (1 + s) : l + s - l * s;

    m1 = 2 * l - m2;

    function v(h) {

      if (h > 360) h -= 360; else if (h < 0) h += 360;

      if (h < 60) return m1 + (m2 - m1) * h / 60;

      if (h < 180) return m2;

      if (h < 240) return m1 + (m2 - m1) * (240 - h) / 60;

      return m1;

    }

    function vv(h) {

      return Math.round(v(h) * 255);

    }

    return new d3_rgb(vv(h + 120), vv(h), vv(h - 120));

  }

  d3.hcl = d3_hcl;

  function d3_hcl(h, c, l) {

    return this instanceof d3_hcl ? void (this.h = +h, this.c = +c, this.l = +l) : arguments.length < 2 ? h instanceof d3_hcl ? new d3_hcl(h.h, h.c, h.l) : h instanceof d3_lab ? d3_lab_hcl(h.l, h.a, h.b) : d3_lab_hcl((h = d3_rgb_lab((h = d3.rgb(h)).r, h.g, h.b)).l, h.a, h.b) : new d3_hcl(h, c, l);

  }

  var d3_hclPrototype = d3_hcl.prototype = new d3_color();

  d3_hclPrototype.brighter = function(k) {

    return new d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)));

  };

  d3_hclPrototype.darker = function(k) {

    return new d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)));

  };

  d3_hclPrototype.rgb = function() {

    return d3_hcl_lab(this.h, this.c, this.l).rgb();

  };

  function d3_hcl_lab(h, c, l) {

    if (isNaN(h)) h = 0;

    if (isNaN(c)) c = 0;

    return new d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c);

  }

  d3.lab = d3_lab;

  function d3_lab(l, a, b) {

    return this instanceof d3_lab ? void (this.l = +l, this.a = +a, this.b = +b) : arguments.length < 2 ? l instanceof d3_lab ? new d3_lab(l.l, l.a, l.b) : l instanceof d3_hcl ? d3_hcl_lab(l.l, l.c, l.h) : d3_rgb_lab((l = d3_rgb(l)).r, l.g, l.b) : new d3_lab(l, a, b);

  }

  var d3_lab_K = 18;

  var d3_lab_X = .95047, d3_lab_Y = 1, d3_lab_Z = 1.08883;

  var d3_labPrototype = d3_lab.prototype = new d3_color();

  d3_labPrototype.brighter = function(k) {

    return new d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);

  };

  d3_labPrototype.darker = function(k) {

    return new d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);

  };

  d3_labPrototype.rgb = function() {

    return d3_lab_rgb(this.l, this.a, this.b);

  };

  function d3_lab_rgb(l, a, b) {

    var y = (l + 16) / 116, x = y + a / 500, z = y - b / 200;

    x = d3_lab_xyz(x) * d3_lab_X;

    y = d3_lab_xyz(y) * d3_lab_Y;

    z = d3_lab_xyz(z) * d3_lab_Z;

    return new d3_rgb(d3_xyz_rgb(3.2404542 * x - 1.5371385 * y - .4985314 * z), d3_xyz_rgb(-.969266 * x + 1.8760108 * y + .041556 * z), d3_xyz_rgb(.0556434 * x - .2040259 * y + 1.0572252 * z));

  }

  function d3_lab_hcl(l, a, b) {

    return l > 0 ? new d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l) : new d3_hcl(NaN, NaN, l);

  }

  function d3_lab_xyz(x) {

    return x > .206893034 ? x * x * x : (x - 4 / 29) / 7.787037;

  }

  function d3_xyz_lab(x) {

    return x > .008856 ? Math.pow(x, 1 / 3) : 7.787037 * x + 4 / 29;

  }

  function d3_xyz_rgb(r) {

    return Math.round(255 * (r <= .00304 ? 12.92 * r : 1.055 * Math.pow(r, 1 / 2.4) - .055));

  }

  d3.rgb = d3_rgb;

  function d3_rgb(r, g, b) {

    return this instanceof d3_rgb ? void (this.r = ~~r, this.g = ~~g, this.b = ~~b) : arguments.length < 2 ? r instanceof d3_rgb ? new d3_rgb(r.r, r.g, r.b) : d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb) : new d3_rgb(r, g, b);

  }

  function d3_rgbNumber(value) {

    return new d3_rgb(value >> 16, value >> 8 & 255, value & 255);

  }

  function d3_rgbString(value) {

    return d3_rgbNumber(value) + "";

  }

  var d3_rgbPrototype = d3_rgb.prototype = new d3_color();

  d3_rgbPrototype.brighter = function(k) {

    k = Math.pow(.7, arguments.length ? k : 1);

    var r = this.r, g = this.g, b = this.b, i = 30;

    if (!r && !g && !b) return new d3_rgb(i, i, i);

    if (r && r < i) r = i;

    if (g && g < i) g = i;

    if (b && b < i) b = i;

    return new d3_rgb(Math.min(255, r / k), Math.min(255, g / k), Math.min(255, b / k));

  };

  d3_rgbPrototype.darker = function(k) {

    k = Math.pow(.7, arguments.length ? k : 1);

    return new d3_rgb(k * this.r, k * this.g, k * this.b);

  };

  d3_rgbPrototype.hsl = function() {

    return d3_rgb_hsl(this.r, this.g, this.b);

  };

  d3_rgbPrototype.toString = function() {

    return "#" + d3_rgb_hex(this.r) + d3_rgb_hex(this.g) + d3_rgb_hex(this.b);

  };

  function d3_rgb_hex(v) {

    return v < 16 ? "0" + Math.max(0, v).toString(16) : Math.min(255, v).toString(16);

  }

  function d3_rgb_parse(format, rgb, hsl) {

    var r = 0, g = 0, b = 0, m1, m2, color;

    m1 = /([a-z]+)\((.*)\)/i.exec(format);

    if (m1) {

      m2 = m1[2].split(",");

      switch (m1[1]) {

       case "hsl":

        {

          return hsl(parseFloat(m2[0]), parseFloat(m2[1]) / 100, parseFloat(m2[2]) / 100);

        }



       case "rgb":

        {

          return rgb(d3_rgb_parseNumber(m2[0]), d3_rgb_parseNumber(m2[1]), d3_rgb_parseNumber(m2[2]));

        }

      }

    }

    if (color = d3_rgb_names.get(format)) return rgb(color.r, color.g, color.b);

    if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.substring(1), 16))) {

      if (format.length === 4) {

        r = (color & 3840) >> 4;

        r = r >> 4 | r;

        g = color & 240;

        g = g >> 4 | g;

        b = color & 15;

        b = b << 4 | b;

      } else if (format.length === 7) {

        r = (color & 16711680) >> 16;

        g = (color & 65280) >> 8;

        b = color & 255;

      }

    }

    return rgb(r, g, b);

  }

  function d3_rgb_hsl(r, g, b) {

    var min = Math.min(r /= 255, g /= 255, b /= 255), max = Math.max(r, g, b), d = max - min, h, s, l = (max + min) / 2;

    if (d) {

      s = l < .5 ? d / (max + min) : d / (2 - max - min);

      if (r == max) h = (g - b) / d + (g < b ? 6 : 0); else if (g == max) h = (b - r) / d + 2; else h = (r - g) / d + 4;

      h *= 60;

    } else {

      h = NaN;

      s = l > 0 && l < 1 ? 0 : h;

    }

    return new d3_hsl(h, s, l);

  }

  function d3_rgb_lab(r, g, b) {

    r = d3_rgb_xyz(r);

    g = d3_rgb_xyz(g);

    b = d3_rgb_xyz(b);

    var x = d3_xyz_lab((.4124564 * r + .3575761 * g + .1804375 * b) / d3_lab_X), y = d3_xyz_lab((.2126729 * r + .7151522 * g + .072175 * b) / d3_lab_Y), z = d3_xyz_lab((.0193339 * r + .119192 * g + .9503041 * b) / d3_lab_Z);

    return d3_lab(116 * y - 16, 500 * (x - y), 200 * (y - z));

  }

  function d3_rgb_xyz(r) {

    return (r /= 255) <= .04045 ? r / 12.92 : Math.pow((r + .055) / 1.055, 2.4);

  }

  function d3_rgb_parseNumber(c) {

    var f = parseFloat(c);

    return c.charAt(c.length - 1) === "%" ? Math.round(f * 2.55) : f;

  }

  var d3_rgb_names = d3.map({

    aliceblue: 15792383,

    antiquewhite: 16444375,

    aqua: 65535,

    aquamarine: 8388564,

    azure: 15794175,

    beige: 16119260,

    bisque: 16770244,

    black: 0,

    blanchedalmond: 16772045,

    blue: 255,

    blueviolet: 9055202,

    brown: 10824234,

    burlywood: 14596231,

    cadetblue: 6266528,

    chartreuse: 8388352,

    chocolate: 13789470,

    coral: 16744272,

    cornflowerblue: 6591981,

    cornsilk: 16775388,

    crimson: 14423100,

    cyan: 65535,

    darkblue: 139,

    darkcyan: 35723,

    darkgoldenrod: 12092939,

    darkgray: 11119017,

    darkgreen: 25600,

    darkgrey: 11119017,

    darkkhaki: 12433259,

    darkmagenta: 9109643,

    darkolivegreen: 5597999,

    darkorange: 16747520,

    darkorchid: 10040012,

    darkred: 9109504,

    darksalmon: 15308410,

    darkseagreen: 9419919,

    darkslateblue: 4734347,

    darkslategray: 3100495,

    darkslategrey: 3100495,

    darkturquoise: 52945,

    darkviolet: 9699539,

    deeppink: 16716947,

    deepskyblue: 49151,

    dimgray: 6908265,

    dimgrey: 6908265,

    dodgerblue: 2003199,

    firebrick: 11674146,

    floralwhite: 16775920,

    forestgreen: 2263842,

    fuchsia: 16711935,

    gainsboro: 14474460,

    ghostwhite: 16316671,

    gold: 16766720,

    goldenrod: 14329120,

    gray: 8421504,

    green: 32768,

    greenyellow: 11403055,

    grey: 8421504,

    honeydew: 15794160,

    hotpink: 16738740,

    indianred: 13458524,

    indigo: 4915330,

    ivory: 16777200,

    khaki: 15787660,

    lavender: 15132410,

    lavenderblush: 16773365,

    lawngreen: 8190976,

    lemonchiffon: 16775885,

    lightblue: 11393254,

    lightcoral: 15761536,

    lightcyan: 14745599,

    lightgoldenrodyellow: 16448210,

    lightgray: 13882323,

    lightgreen: 9498256,

    lightgrey: 13882323,

    lightpink: 16758465,

    lightsalmon: 16752762,

    lightseagreen: 2142890,

    lightskyblue: 8900346,

    lightslategray: 7833753,

    lightslategrey: 7833753,

    lightsteelblue: 11584734,

    lightyellow: 16777184,

    lime: 65280,

    limegreen: 3329330,

    linen: 16445670,

    magenta: 16711935,

    maroon: 8388608,

    mediumaquamarine: 6737322,

    mediumblue: 205,

    mediumorchid: 12211667,

    mediumpurple: 9662683,

    mediumseagreen: 3978097,

    mediumslateblue: 8087790,

    mediumspringgreen: 64154,

    mediumturquoise: 4772300,

    mediumvioletred: 13047173,

    midnightblue: 1644912,

    mintcream: 16121850,

    mistyrose: 16770273,

    moccasin: 16770229,

    navajowhite: 16768685,

    navy: 128,

    oldlace: 16643558,

    olive: 8421376,

    olivedrab: 7048739,

    orange: 16753920,

    orangered: 16729344,

    orchid: 14315734,

    palegoldenrod: 15657130,

    palegreen: 10025880,

    paleturquoise: 11529966,

    palevioletred: 14381203,

    papayawhip: 16773077,

    peachpuff: 16767673,

    peru: 13468991,

    pink: 16761035,

    plum: 14524637,

    powderblue: 11591910,

    purple: 8388736,

    red: 16711680,

    rosybrown: 12357519,

    royalblue: 4286945,

    saddlebrown: 9127187,

    salmon: 16416882,

    sandybrown: 16032864,

    seagreen: 3050327,

    seashell: 16774638,

    sienna: 10506797,

    silver: 12632256,

    skyblue: 8900331,

    slateblue: 6970061,

    slategray: 7372944,

    slategrey: 7372944,

    snow: 16775930,

    springgreen: 65407,

    steelblue: 4620980,

    tan: 13808780,

    teal: 32896,

    thistle: 14204888,

    tomato: 16737095,

    turquoise: 4251856,

    violet: 15631086,

    wheat: 16113331,

    white: 16777215,

    whitesmoke: 16119285,

    yellow: 16776960,

    yellowgreen: 10145074

  });

  d3_rgb_names.forEach(function(key, value) {

    d3_rgb_names.set(key, d3_rgbNumber(value));

  });

  function d3_functor(v) {

    return typeof v === "function" ? v : function() {

      return v;

    };

  }

  d3.functor = d3_functor;

  function d3_identity(d) {

    return d;

  }

  d3.xhr = d3_xhrType(d3_identity);

  function d3_xhrType(response) {

    return function(url, mimeType, callback) {

      if (arguments.length === 2 && typeof mimeType === "function") callback = mimeType,

      mimeType = null;

      return d3_xhr(url, mimeType, response, callback);

    };

  }

  function d3_xhr(url, mimeType, response, callback) {

    var xhr = {}, dispatch = d3.dispatch("beforesend", "progress", "load", "error"), headers = {}, request = new XMLHttpRequest(), responseType = null;

    if (d3_window.XDomainRequest && !("withCredentials" in request) && /^(http(s)?:)?\/\//.test(url)) request = new XDomainRequest();

    "onload" in request ? request.onload = request.onerror = respond : request.onreadystatechange = function() {

      request.readyState > 3 && respond();

    };

    function respond() {

      var status = request.status, result;

      if (!status && request.responseText || status >= 200 && status < 300 || status === 304) {

        try {

          result = response.call(xhr, request);

        } catch (e) {

          dispatch.error.call(xhr, e);

          return;

        }

        dispatch.load.call(xhr, result);

      } else {

        dispatch.error.call(xhr, request);

      }

    }

    request.onprogress = function(event) {

      var o = d3.event;

      d3.event = event;

      try {

        dispatch.progress.call(xhr, request);

      } finally {

        d3.event = o;

      }

    };

    xhr.header = function(name, value) {

      name = (name + "").toLowerCase();

      if (arguments.length < 2) return headers[name];

      if (value == null) delete headers[name]; else headers[name] = value + "";

      return xhr;

    };

    xhr.mimeType = function(value) {

      if (!arguments.length) return mimeType;

      mimeType = value == null ? null : value + "";

      return xhr;

    };

    xhr.responseType = function(value) {

      if (!arguments.length) return responseType;

      responseType = value;

      return xhr;

    };

    xhr.response = function(value) {

      response = value;

      return xhr;

    };

    [ "get", "post" ].forEach(function(method) {

      xhr[method] = function() {

        return xhr.send.apply(xhr, [ method ].concat(d3_array(arguments)));

      };

    });

    xhr.send = function(method, data, callback) {

      if (arguments.length === 2 && typeof data === "function") callback = data, data = null;

      request.open(method, url, true);

      if (mimeType != null && !("accept" in headers)) headers["accept"] = mimeType + ",*/*";

      if (request.setRequestHeader) for (var name in headers) request.setRequestHeader(name, headers[name]);

      if (mimeType != null && request.overrideMimeType) request.overrideMimeType(mimeType);

      if (responseType != null) request.responseType = responseType;

      if (callback != null) xhr.on("error", callback).on("load", function(request) {

        callback(null, request);

      });

      dispatch.beforesend.call(xhr, request);

      request.send(data == null ? null : data);

      return xhr;

    };

    xhr.abort = function() {

      request.abort();

      return xhr;

    };

    d3.rebind(xhr, dispatch, "on");

    return callback == null ? xhr : xhr.get(d3_xhr_fixCallback(callback));

  }

  function d3_xhr_fixCallback(callback) {

    return callback.length === 1 ? function(error, request) {

      callback(error == null ? request : null);

    } : callback;

  }

  d3.dsv = function(delimiter, mimeType) {

    var reFormat = new RegExp('["' + delimiter + "\n]"), delimiterCode = delimiter.charCodeAt(0);

    function dsv(url, row, callback) {

      if (arguments.length < 3) callback = row, row = null;

      var xhr = d3_xhr(url, mimeType, row == null ? response : typedResponse(row), callback);

      xhr.row = function(_) {

        return arguments.length ? xhr.response((row = _) == null ? response : typedResponse(_)) : row;

      };

      return xhr;

    }

    function response(request) {

      return dsv.parse(request.responseText);

    }

    function typedResponse(f) {

      return function(request) {

        return dsv.parse(request.responseText, f);

      };

    }

    dsv.parse = function(text, f) {

      var o;

      return dsv.parseRows(text, function(row, i) {

        if (o) return o(row, i - 1);

        var a = new Function("d", "return {" + row.map(function(name, i) {

          return JSON.stringify(name) + ": d[" + i + "]";

        }).join(",") + "}");

        o = f ? function(row, i) {

          return f(a(row), i);

        } : a;

      });

    };

    dsv.parseRows = function(text, f) {

      var EOL = {}, EOF = {}, rows = [], N = text.length, I = 0, n = 0, t, eol;

      function token() {

        if (I >= N) return EOF;

        if (eol) return eol = false, EOL;

        var j = I;

        if (text.charCodeAt(j) === 34) {

          var i = j;

          while (i++ < N) {

            if (text.charCodeAt(i) === 34) {

              if (text.charCodeAt(i + 1) !== 34) break;

              ++i;

            }

          }

          I = i + 2;

          var c = text.charCodeAt(i + 1);

          if (c === 13) {

            eol = true;

            if (text.charCodeAt(i + 2) === 10) ++I;

          } else if (c === 10) {

            eol = true;

          }

          return text.substring(j + 1, i).replace(/""/g, '"');

        }

        while (I < N) {

          var c = text.charCodeAt(I++), k = 1;

          if (c === 10) eol = true; else if (c === 13) {

            eol = true;

            if (text.charCodeAt(I) === 10) ++I, ++k;

          } else if (c !== delimiterCode) continue;

          return text.substring(j, I - k);

        }

        return text.substring(j);

      }

      while ((t = token()) !== EOF) {

        var a = [];

        while (t !== EOL && t !== EOF) {

          a.push(t);

          t = token();

        }

        if (f && !(a = f(a, n++))) continue;

        rows.push(a);

      }

      return rows;

    };

    dsv.format = function(rows) {

      if (Array.isArray(rows[0])) return dsv.formatRows(rows);

      var fieldSet = new d3_Set(), fields = [];

      rows.forEach(function(row) {

        for (var field in row) {

          if (!fieldSet.has(field)) {

            fields.push(fieldSet.add(field));

          }

        }

      });

      return [ fields.map(formatValue).join(delimiter) ].concat(rows.map(function(row) {

        return fields.map(function(field) {

          return formatValue(row[field]);

        }).join(delimiter);

      })).join("\n");

    };

    dsv.formatRows = function(rows) {

      return rows.map(formatRow).join("\n");

    };

    function formatRow(row) {

      return row.map(formatValue).join(delimiter);

    }

    function formatValue(text) {

      return reFormat.test(text) ? '"' + text.replace(/\"/g, '""') + '"' : text;

    }

    return dsv;

  };

  d3.csv = d3.dsv(",", "text/csv");

  d3.tsv = d3.dsv(" ", "text/tab-separated-values");

  d3.touch = function(container, touches, identifier) {

    if (arguments.length < 3) identifier = touches, touches = d3_eventSource().changedTouches;

    if (touches) for (var i = 0, n = touches.length, touch; i < n; ++i) {

      if ((touch = touches[i]).identifier === identifier) {

        return d3_mousePoint(container, touch);

      }

    }

  };

  var d3_timer_queueHead, d3_timer_queueTail, d3_timer_interval, d3_timer_timeout, d3_timer_active, d3_timer_frame = d3_window[d3_vendorSymbol(d3_window, "requestAnimationFrame")] || function(callback) {

    setTimeout(callback, 17);

  };

  d3.timer = function(callback, delay, then) {

    var n = arguments.length;

    if (n < 2) delay = 0;

    if (n < 3) then = Date.now();

    var time = then + delay, timer = {

      c: callback,

      t: time,

      f: false,

      n: null

    };

    if (d3_timer_queueTail) d3_timer_queueTail.n = timer; else d3_timer_queueHead = timer;

    d3_timer_queueTail = timer;

    if (!d3_timer_interval) {

      d3_timer_timeout = clearTimeout(d3_timer_timeout);

      d3_timer_interval = 1;

      d3_timer_frame(d3_timer_step);

    }

  };

  function d3_timer_step() {

    var now = d3_timer_mark(), delay = d3_timer_sweep() - now;

    if (delay > 24) {

      if (isFinite(delay)) {

        clearTimeout(d3_timer_timeout);

        d3_timer_timeout = setTimeout(d3_timer_step, delay);

      }

      d3_timer_interval = 0;

    } else {

      d3_timer_interval = 1;

      d3_timer_frame(d3_timer_step);

    }

  }

  d3.timer.flush = function() {

    d3_timer_mark();

    d3_timer_sweep();

  };

  function d3_timer_mark() {

    var now = Date.now();

    d3_timer_active = d3_timer_queueHead;

    while (d3_timer_active) {

      if (now >= d3_timer_active.t) d3_timer_active.f = d3_timer_active.c(now - d3_timer_active.t);

      d3_timer_active = d3_timer_active.n;

    }

    return now;

  }

  function d3_timer_sweep() {

    var t0, t1 = d3_timer_queueHead, time = Infinity;

    while (t1) {

      if (t1.f) {

        t1 = t0 ? t0.n = t1.n : d3_timer_queueHead = t1.n;

      } else {

        if (t1.t < time) time = t1.t;

        t1 = (t0 = t1).n;

      }

    }

    d3_timer_queueTail = t0;

    return time;

  }

  function d3_format_precision(x, p) {

    return p - (x ? Math.ceil(Math.log(x) / Math.LN10) : 1);

  }

  d3.round = function(x, n) {

    return n ? Math.round(x * (n = Math.pow(10, n))) / n : Math.round(x);

  };

  var d3_formatPrefixes = [ "y", "z", "a", "f", "p", "n", "?", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y" ].map(d3_formatPrefix);

  d3.formatPrefix = function(value, precision) {

    var i = 0;

    if (value) {

      if (value < 0) value *= -1;

      if (precision) value = d3.round(value, d3_format_precision(value, precision));

      i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10);

      i = Math.max(-24, Math.min(24, Math.floor((i - 1) / 3) * 3));

    }

    return d3_formatPrefixes[8 + i / 3];

  };

  function d3_formatPrefix(d, i) {

    var k = Math.pow(10, abs(8 - i) * 3);

    return {

      scale: i > 8 ? function(d) {

        return d / k;

      } : function(d) {

        return d * k;

      },

      symbol: d

    };

  }

  function d3_locale_numberFormat(locale) {

    var locale_decimal = locale.decimal, locale_thousands = locale.thousands, locale_grouping = locale.grouping, locale_currency = locale.currency, formatGroup = locale_grouping ? function(value) {

      var i = value.length, t = [], j = 0, g = locale_grouping[0];

      while (i > 0 && g > 0) {

        t.push(value.substring(i -= g, i + g));

        g = locale_grouping[j = (j + 1) % locale_grouping.length];

      }

      return t.reverse().join(locale_thousands);

    } : d3_identity;

    return function(specifier) {

      var match = d3_format_re.exec(specifier), fill = match[1] || " ", align = match[2] || ">", sign = match[3] || "", symbol = match[4] || "", zfill = match[5], width = +match[6], comma = match[7], precision = match[8], type = match[9], scale = 1, prefix = "", suffix = "", integer = false;

      if (precision) precision = +precision.substring(1);

      if (zfill || fill === "0" && align === "=") {

        zfill = fill = "0";

        align = "=";

        if (comma) width -= Math.floor((width - 1) / 4);

      }

      switch (type) {

       case "n":

        comma = true;

        type = "g";

        break;



       case "%":

        scale = 100;

        suffix = "%";

        type = "f";

        break;



       case "p":

        scale = 100;

        suffix = "%";

        type = "r";

        break;



       case "b":

       case "o":

       case "x":

       case "X":

        if (symbol === "#") prefix = "0" + type.toLowerCase();



       case "c":

       case "d":

        integer = true;

        precision = 0;

        break;



       case "s":

        scale = -1;

        type = "r";

        break;

      }

      if (symbol === "$") prefix = locale_currency[0], suffix = locale_currency[1];

      if (type == "r" && !precision) type = "g";

      if (precision != null) {

        if (type == "g") precision = Math.max(1, Math.min(21, precision)); else if (type == "e" || type == "f") precision = Math.max(0, Math.min(20, precision));

      }

      type = d3_format_types.get(type) || d3_format_typeDefault;

      var zcomma = zfill && comma;

      return function(value) {

        var fullSuffix = suffix;

        if (integer && value % 1) return "";

        var negative = value < 0 || value === 0 && 1 / value < 0 ? (value = -value, "-") : sign;

        if (scale < 0) {

          var unit = d3.formatPrefix(value, precision);

          value = unit.scale(value);

          fullSuffix = unit.symbol + suffix;

        } else {

          value *= scale;

        }

        value = type(value, precision);

        var i = value.lastIndexOf("."), before = i < 0 ? value : value.substring(0, i), after = i < 0 ? "" : locale_decimal + value.substring(i + 1);

        if (!zfill && comma) before = formatGroup(before);

        var length = prefix.length + before.length + after.length + (zcomma ? 0 : negative.length), padding = length < width ? new Array(length = width - length + 1).join(fill) : "";

        if (zcomma) before = formatGroup(padding + before);

        negative += prefix;

        value = before + after;

        return (align === "<" ? negative + value + padding : align === ">" ? padding + negative + value : align === "^" ? padding.substring(0, length >>= 1) + negative + value + padding.substring(length) : negative + (zcomma ? value : padding + value)) + fullSuffix;

      };

    };

  }

  var d3_format_re = /(?:([^{])?([<>=^]))?([+\- ])?([$#])?(0)?(\d+)?(,)?(\.-?\d+)?([a-z%])?/i;

  var d3_format_types = d3.map({

    b: function(x) {

      return x.toString(2);

    },

    c: function(x) {

      return String.fromCharCode(x);

    },

    o: function(x) {

      return x.toString(8);

    },

    x: function(x) {

      return x.toString(16);

    },

    X: function(x) {

      return x.toString(16).toUpperCase();

    },

    g: function(x, p) {

      return x.toPrecision(p);

    },

    e: function(x, p) {

      return x.toExponential(p);

    },

    f: function(x, p) {

      return x.toFixed(p);

    },

    r: function(x, p) {

      return (x = d3.round(x, d3_format_precision(x, p))).toFixed(Math.max(0, Math.min(20, d3_format_precision(x * (1 + 1e-15), p))));

    }

  });

  function d3_format_typeDefault(x) {

    return x + "";

  }

  var d3_time = d3.time = {}, d3_date = Date;

  function d3_date_utc() {

    this._ = new Date(arguments.length > 1 ? Date.UTC.apply(this, arguments) : arguments[0]);

  }

  d3_date_utc.prototype = {

    getDate: function() {

      return this._.getUTCDate();

    },

    getDay: function() {

      return this._.getUTCDay();

    },

    getFullYear: function() {

      return this._.getUTCFullYear();

    },

    getHours: function() {

      return this._.getUTCHours();

    },

    getMilliseconds: function() {

      return this._.getUTCMilliseconds();

    },

    getMinutes: function() {

      return this._.getUTCMinutes();

    },

    getMonth: function() {

      return this._.getUTCMonth();

    },

    getSeconds: function() {

      return this._.getUTCSeconds();

    },

    getTime: function() {

      return this._.getTime();

    },

    getTimezoneOffset: function() {

      return 0;

    },

    valueOf: function() {

      return this._.valueOf();

    },

    setDate: function() {

      d3_time_prototype.setUTCDate.apply(this._, arguments);

    },

    setDay: function() {

      d3_time_prototype.setUTCDay.apply(this._, arguments);

    },

    setFullYear: function() {

      d3_time_prototype.setUTCFullYear.apply(this._, arguments);

    },

    setHours: function() {

      d3_time_prototype.setUTCHours.apply(this._, arguments);

    },

    setMilliseconds: function() {

      d3_time_prototype.setUTCMilliseconds.apply(this._, arguments);

    },

    setMinutes: function() {

      d3_time_prototype.setUTCMinutes.apply(this._, arguments);

    },

    setMonth: function() {

      d3_time_prototype.setUTCMonth.apply(this._, arguments);

    },

    setSeconds: function() {

      d3_time_prototype.setUTCSeconds.apply(this._, arguments);

    },

    setTime: function() {

      d3_time_prototype.setTime.apply(this._, arguments);

    }

  };

  var d3_time_prototype = Date.prototype;

  function d3_time_interval(local, step, number) {

    function round(date) {

      var d0 = local(date), d1 = offset(d0, 1);

      return date - d0 < d1 - date ? d0 : d1;

    }

    function ceil(date) {

      step(date = local(new d3_date(date - 1)), 1);

      return date;

    }

    function offset(date, k) {

      step(date = new d3_date(+date), k);

      return date;

    }

    function range(t0, t1, dt) {

      var time = ceil(t0), times = [];

      if (dt > 1) {

        while (time < t1) {

          if (!(number(time) % dt)) times.push(new Date(+time));

          step(time, 1);

        }

      } else {

        while (time < t1) times.push(new Date(+time)), step(time, 1);

      }

      return times;

    }

    function range_utc(t0, t1, dt) {

      try {

        d3_date = d3_date_utc;

        var utc = new d3_date_utc();

        utc._ = t0;

        return range(utc, t1, dt);

      } finally {

        d3_date = Date;

      }

    }

    local.floor = local;

    local.round = round;

    local.ceil = ceil;

    local.offset = offset;

    local.range = range;

    var utc = local.utc = d3_time_interval_utc(local);

    utc.floor = utc;

    utc.round = d3_time_interval_utc(round);

    utc.ceil = d3_time_interval_utc(ceil);

    utc.offset = d3_time_interval_utc(offset);

    utc.range = range_utc;

    return local;

  }

  function d3_time_interval_utc(method) {

    return function(date, k) {

      try {

        d3_date = d3_date_utc;

        var utc = new d3_date_utc();

        utc._ = date;

        return method(utc, k)._;

      } finally {

        d3_date = Date;

      }

    };

  }

  d3_time.year = d3_time_interval(function(date) {

    date = d3_time.day(date);

    date.setMonth(0, 1);

    return date;

  }, function(date, offset) {

    date.setFullYear(date.getFullYear() + offset);

  }, function(date) {

    return date.getFullYear();

  });

  d3_time.years = d3_time.year.range;

  d3_time.years.utc = d3_time.year.utc.range;

  d3_time.day = d3_time_interval(function(date) {

    var day = new d3_date(2e3, 0);

    day.setFullYear(date.getFullYear(), date.getMonth(), date.getDate());

    return day;

  }, function(date, offset) {

    date.setDate(date.getDate() + offset);

  }, function(date) {

    return date.getDate() - 1;

  });

  d3_time.days = d3_time.day.range;

  d3_time.days.utc = d3_time.day.utc.range;

  d3_time.dayOfYear = function(date) {

    var year = d3_time.year(date);

    return Math.floor((date - year - (date.getTimezoneOffset() - year.getTimezoneOffset()) * 6e4) / 864e5);

  };

  [ "sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday" ].forEach(function(day, i) {

    i = 7 - i;

    var interval = d3_time[day] = d3_time_interval(function(date) {

      (date = d3_time.day(date)).setDate(date.getDate() - (date.getDay() + i) % 7);

      return date;

    }, function(date, offset) {

      date.setDate(date.getDate() + Math.floor(offset) * 7);

    }, function(date) {

      var day = d3_time.year(date).getDay();

      return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7) - (day !== i);

    });

    d3_time[day + "s"] = interval.range;

    d3_time[day + "s"].utc = interval.utc.range;

    d3_time[day + "OfYear"] = function(date) {

      var day = d3_time.year(date).getDay();

      return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7);

    };

  });

  d3_time.week = d3_time.sunday;

  d3_time.weeks = d3_time.sunday.range;

  d3_time.weeks.utc = d3_time.sunday.utc.range;

  d3_time.weekOfYear = d3_time.sundayOfYear;

  function d3_locale_timeFormat(locale) {

    var locale_dateTime = locale.dateTime, locale_date = locale.date, locale_time = locale.time, locale_periods = locale.periods, locale_days = locale.days, locale_shortDays = locale.shortDays, locale_months = locale.months, locale_shortMonths = locale.shortMonths;

    function d3_time_format(template) {

      var n = template.length;

      function format(date) {

        var string = [], i = -1, j = 0, c, p, f;

        while (++i < n) {

          if (template.charCodeAt(i) === 37) {

            string.push(template.substring(j, i));

            if ((p = d3_time_formatPads[c = template.charAt(++i)]) != null) c = template.charAt(++i);

            if (f = d3_time_formats[c]) c = f(date, p == null ? c === "e" ? " " : "0" : p);

            string.push(c);

            j = i + 1;

          }

        }

        string.push(template.substring(j, i));

        return string.join("");

      }

      format.parse = function(string) {

        var d = {

          y: 1900,

          m: 0,

          d: 1,

          H: 0,

          M: 0,

          S: 0,

          L: 0,

          Z: null

        }, i = d3_time_parse(d, template, string, 0);

        if (i != string.length) return null;

        if ("p" in d) d.H = d.H % 12 + d.p * 12;

        var localZ = d.Z != null && d3_date !== d3_date_utc, date = new (localZ ? d3_date_utc : d3_date)();

        if ("j" in d) date.setFullYear(d.y, 0, d.j); else if ("w" in d && ("W" in d || "U" in d)) {

          date.setFullYear(d.y, 0, 1);

          date.setFullYear(d.y, 0, "W" in d ? (d.w + 6) % 7 + d.W * 7 - (date.getDay() + 5) % 7 : d.w + d.U * 7 - (date.getDay() + 6) % 7);

        } else date.setFullYear(d.y, d.m, d.d);

        date.setHours(d.H + Math.floor(d.Z / 100), d.M + d.Z % 100, d.S, d.L);

        return localZ ? date._ : date;

      };

      format.toString = function() {

        return template;

      };

      return format;

    }

    function d3_time_parse(date, template, string, j) {

      var c, p, t, i = 0, n = template.length, m = string.length;

      while (i < n) {

        if (j >= m) return -1;

        c = template.charCodeAt(i++);

        if (c === 37) {

          t = template.charAt(i++);

          p = d3_time_parsers[t in d3_time_formatPads ? template.charAt(i++) : t];

          if (!p || (j = p(date, string, j)) < 0) return -1;

        } else if (c != string.charCodeAt(j++)) {

          return -1;

        }

      }

      return j;

    }

    d3_time_format.utc = function(template) {

      var local = d3_time_format(template);

      function format(date) {

        try {

          d3_date = d3_date_utc;

          var utc = new d3_date();

          utc._ = date;

          return local(utc);

        } finally {

          d3_date = Date;

        }

      }

      format.parse = function(string) {

        try {

          d3_date = d3_date_utc;

          var date = local.parse(string);

          return date && date._;

        } finally {

          d3_date = Date;

        }

      };

      format.toString = local.toString;

      return format;

    };

    d3_time_format.multi = d3_time_format.utc.multi = d3_time_formatMulti;

    var d3_time_periodLookup = d3.map(), d3_time_dayRe = d3_time_formatRe(locale_days), d3_time_dayLookup = d3_time_formatLookup(locale_days), d3_time_dayAbbrevRe = d3_time_formatRe(locale_shortDays), d3_time_dayAbbrevLookup = d3_time_formatLookup(locale_shortDays), d3_time_monthRe = d3_time_formatRe(locale_months), d3_time_monthLookup = d3_time_formatLookup(locale_months), d3_time_monthAbbrevRe = d3_time_formatRe(locale_shortMonths), d3_time_monthAbbrevLookup = d3_time_formatLookup(locale_shortMonths);

    locale_periods.forEach(function(p, i) {

      d3_time_periodLookup.set(p.toLowerCase(), i);

    });

    var d3_time_formats = {

      a: function(d) {

        return locale_shortDays[d.getDay()];

      },

      A: function(d) {

        return locale_days[d.getDay()];

      },

      b: function(d) {

        return locale_shortMonths[d.getMonth()];

      },

      B: function(d) {

        return locale_months[d.getMonth()];

      },

      c: d3_time_format(locale_dateTime),

      d: function(d, p) {

        return d3_time_formatPad(d.getDate(), p, 2);

      },

      e: function(d, p) {

        return d3_time_formatPad(d.getDate(), p, 2);

      },

      H: function(d, p) {

        return d3_time_formatPad(d.getHours(), p, 2);

      },

      I: function(d, p) {

        return d3_time_formatPad(d.getHours() % 12 || 12, p, 2);

      },

      j: function(d, p) {

        return d3_time_formatPad(1 + d3_time.dayOfYear(d), p, 3);

      },

      L: function(d, p) {

        return d3_time_formatPad(d.getMilliseconds(), p, 3);

      },

      m: function(d, p) {

        return d3_time_formatPad(d.getMonth() + 1, p, 2);

      },

      M: function(d, p) {

        return d3_time_formatPad(d.getMinutes(), p, 2);

      },

      p: function(d) {

        return locale_periods[+(d.getHours() >= 12)];

      },

      S: function(d, p) {

        return d3_time_formatPad(d.getSeconds(), p, 2);

      },

      U: function(d, p) {

        return d3_time_formatPad(d3_time.sundayOfYear(d), p, 2);

      },

      w: function(d) {

        return d.getDay();

      },

      W: function(d, p) {

        return d3_time_formatPad(d3_time.mondayOfYear(d), p, 2);

      },

      x: d3_time_format(locale_date),

      X: d3_time_format(locale_time),

      y: function(d, p) {

        return d3_time_formatPad(d.getFullYear() % 100, p, 2);

      },

      Y: function(d, p) {

        return d3_time_formatPad(d.getFullYear() % 1e4, p, 4);

      },

      Z: d3_time_zone,

      "%": function() {

        return "%";

      }

    };

    var d3_time_parsers = {

      a: d3_time_parseWeekdayAbbrev,

      A: d3_time_parseWeekday,

      b: d3_time_parseMonthAbbrev,

      B: d3_time_parseMonth,

      c: d3_time_parseLocaleFull,

      d: d3_time_parseDay,

      e: d3_time_parseDay,

      H: d3_time_parseHour24,

      I: d3_time_parseHour24,

      j: d3_time_parseDayOfYear,

      L: d3_time_parseMilliseconds,

      m: d3_time_parseMonthNumber,

      M: d3_time_parseMinutes,

      p: d3_time_parseAmPm,

      S: d3_time_parseSeconds,

      U: d3_time_parseWeekNumberSunday,

      w: d3_time_parseWeekdayNumber,

      W: d3_time_parseWeekNumberMonday,

      x: d3_time_parseLocaleDate,

      X: d3_time_parseLocaleTime,

      y: d3_time_parseYear,

      Y: d3_time_parseFullYear,

      Z: d3_time_parseZone,

      "%": d3_time_parseLiteralPercent

    };

    function d3_time_parseWeekdayAbbrev(date, string, i) {

      d3_time_dayAbbrevRe.lastIndex = 0;

      var n = d3_time_dayAbbrevRe.exec(string.substring(i));

      return n ? (date.w = d3_time_dayAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;

    }

    function d3_time_parseWeekday(date, string, i) {

      d3_time_dayRe.lastIndex = 0;

      var n = d3_time_dayRe.exec(string.substring(i));

      return n ? (date.w = d3_time_dayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;

    }

    function d3_time_parseMonthAbbrev(date, string, i) {

      d3_time_monthAbbrevRe.lastIndex = 0;

      var n = d3_time_monthAbbrevRe.exec(string.substring(i));

      return n ? (date.m = d3_time_monthAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;

    }

    function d3_time_parseMonth(date, string, i) {

      d3_time_monthRe.lastIndex = 0;

      var n = d3_time_monthRe.exec(string.substring(i));

      return n ? (date.m = d3_time_monthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;

    }

    function d3_time_parseLocaleFull(date, string, i) {

      return d3_time_parse(date, d3_time_formats.c.toString(), string, i);

    }

    function d3_time_parseLocaleDate(date, string, i) {

      return d3_time_parse(date, d3_time_formats.x.toString(), string, i);

    }

    function d3_time_parseLocaleTime(date, string, i) {

      return d3_time_parse(date, d3_time_formats.X.toString(), string, i);

    }

    function d3_time_parseAmPm(date, string, i) {

      var n = d3_time_periodLookup.get(string.substring(i, i += 2).toLowerCase());

      return n == null ? -1 : (date.p = n, i);

    }

    return d3_time_format;

  }

  var d3_time_formatPads = {

    "-": "",

    _: " ",

    "0": "0"

  }, d3_time_numberRe = /^\s*\d+/, d3_time_percentRe = /^%/;

  function d3_time_formatPad(value, fill, width) {

    var sign = value < 0 ? "-" : "", string = (sign ? -value : value) + "", length = string.length;

    return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);

  }

  function d3_time_formatRe(names) {

    return new RegExp("^(?:" + names.map(d3.requote).join("|") + ")", "i");

  }

  function d3_time_formatLookup(names) {

    var map = new d3_Map(), i = -1, n = names.length;

    while (++i < n) map.set(names[i].toLowerCase(), i);

    return map;

  }

  function d3_time_parseWeekdayNumber(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 1));

    return n ? (date.w = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseWeekNumberSunday(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i));

    return n ? (date.U = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseWeekNumberMonday(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i));

    return n ? (date.W = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseFullYear(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 4));

    return n ? (date.y = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseYear(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.y = d3_time_expandYear(+n[0]), i + n[0].length) : -1;

  }

  function d3_time_parseZone(date, string, i) {

    return /^[+-]\d{4}$/.test(string = string.substring(i, i + 5)) ? (date.Z = -string,

    i + 5) : -1;

  }

  function d3_time_expandYear(d) {

    return d + (d > 68 ? 1900 : 2e3);

  }

  function d3_time_parseMonthNumber(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.m = n[0] - 1, i + n[0].length) : -1;

  }

  function d3_time_parseDay(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.d = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseDayOfYear(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 3));

    return n ? (date.j = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseHour24(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.H = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseMinutes(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.M = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseSeconds(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 2));

    return n ? (date.S = +n[0], i + n[0].length) : -1;

  }

  function d3_time_parseMilliseconds(date, string, i) {

    d3_time_numberRe.lastIndex = 0;

    var n = d3_time_numberRe.exec(string.substring(i, i + 3));

    return n ? (date.L = +n[0], i + n[0].length) : -1;

  }

  function d3_time_zone(d) {

    var z = d.getTimezoneOffset(), zs = z > 0 ? "-" : "+", zh = ~~(abs(z) / 60), zm = abs(z) % 60;

    return zs + d3_time_formatPad(zh, "0", 2) + d3_time_formatPad(zm, "0", 2);

  }

  function d3_time_parseLiteralPercent(date, string, i) {

    d3_time_percentRe.lastIndex = 0;

    var n = d3_time_percentRe.exec(string.substring(i, i + 1));

    return n ? i + n[0].length : -1;

  }

  function d3_time_formatMulti(formats) {

    var n = formats.length, i = -1;

    while (++i < n) formats[i][0] = this(formats[i][0]);

    return function(date) {

      var i = 0, f = formats[i];

      while (!f[1](date)) f = formats[++i];

      return f[0](date);

    };

  }

  d3.locale = function(locale) {

    return {

      numberFormat: d3_locale_numberFormat(locale),

      timeFormat: d3_locale_timeFormat(locale)

    };

  };

  var d3_locale_enUS = d3.locale({

    decimal: ".",

    thousands: ",",

    grouping: [ 3 ],

    currency: [ "$", "" ],

    dateTime: "%a %b %e %X %Y",

    date: "%m/%d/%Y",

    time: "%H:%M:%S",

    periods: [ "AM", "PM" ],

    days: [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ],

    shortDays: [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ],

    months: [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ],

    shortMonths: [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ]

  });

  d3.format = d3_locale_enUS.numberFormat;

  d3.geo = {};

  function d3_adder() {}

  d3_adder.prototype = {

    s: 0,

    t: 0,

    add: function(y) {

      d3_adderSum(y, this.t, d3_adderTemp);

      d3_adderSum(d3_adderTemp.s, this.s, this);

      if (this.s) this.t += d3_adderTemp.t; else this.s = d3_adderTemp.t;

    },

    reset: function() {

      this.s = this.t = 0;

    },

    valueOf: function() {

      return this.s;

    }

  };

  var d3_adderTemp = new d3_adder();

  function d3_adderSum(a, b, o) {

    var x = o.s = a + b, bv = x - a, av = x - bv;

    o.t = a - av + (b - bv);

  }

  d3.geo.stream = function(object, listener) {

    if (object && d3_geo_streamObjectType.hasOwnProperty(object.type)) {

      d3_geo_streamObjectType[object.type](object, listener);

    } else {

      d3_geo_streamGeometry(object, listener);

    }

  };

  function d3_geo_streamGeometry(geometry, listener) {

    if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) {

      d3_geo_streamGeometryType[geometry.type](geometry, listener);

    }

  }

  var d3_geo_streamObjectType = {

    Feature: function(feature, listener) {

      d3_geo_streamGeometry(feature.geometry, listener);

    },

    FeatureCollection: function(object, listener) {

      var features = object.features, i = -1, n = features.length;

      while (++i < n) d3_geo_streamGeometry(features[i].geometry, listener);

    }

  };

  var d3_geo_streamGeometryType = {

    Sphere: function(object, listener) {

      listener.sphere();

    },

    Point: function(object, listener) {

      object = object.coordinates;

      listener.point(object[0], object[1], object[2]);

    },

    MultiPoint: function(object, listener) {

      var coordinates = object.coordinates, i = -1, n = coordinates.length;

      while (++i < n) object = coordinates[i], listener.point(object[0], object[1], object[2]);

    },

    LineString: function(object, listener) {

      d3_geo_streamLine(object.coordinates, listener, 0);

    },

    MultiLineString: function(object, listener) {

      var coordinates = object.coordinates, i = -1, n = coordinates.length;

      while (++i < n) d3_geo_streamLine(coordinates[i], listener, 0);

    },

    Polygon: function(object, listener) {

      d3_geo_streamPolygon(object.coordinates, listener);

    },

    MultiPolygon: function(object, listener) {

      var coordinates = object.coordinates, i = -1, n = coordinates.length;

      while (++i < n) d3_geo_streamPolygon(coordinates[i], listener);

    },

    GeometryCollection: function(object, listener) {

      var geometries = object.geometries, i = -1, n = geometries.length;

      while (++i < n) d3_geo_streamGeometry(geometries[i], listener);

    }

  };

  function d3_geo_streamLine(coordinates, listener, closed) {

    var i = -1, n = coordinates.length - closed, coordinate;

    listener.lineStart();

    while (++i < n) coordinate = coordinates[i], listener.point(coordinate[0], coordinate[1], coordinate[2]);

    listener.lineEnd();

  }

  function d3_geo_streamPolygon(coordinates, listener) {

    var i = -1, n = coordinates.length;

    listener.polygonStart();

    while (++i < n) d3_geo_streamLine(coordinates[i], listener, 1);

    listener.polygonEnd();

  }

  d3.geo.area = function(object) {

    d3_geo_areaSum = 0;

    d3.geo.stream(object, d3_geo_area);

    return d3_geo_areaSum;

  };

  var d3_geo_areaSum, d3_geo_areaRingSum = new d3_adder();

  var d3_geo_area = {

    sphere: function() {

      d3_geo_areaSum += 4 * ?;

    },

    point: d3_noop,

    lineStart: d3_noop,

    lineEnd: d3_noop,

    polygonStart: function() {

      d3_geo_areaRingSum.reset();

      d3_geo_area.lineStart = d3_geo_areaRingStart;

    },

    polygonEnd: function() {

      var area = 2 * d3_geo_areaRingSum;

      d3_geo_areaSum += area < 0 ? 4 * ? + area : area;

      d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop;

    }

  };

  function d3_geo_areaRingStart() {

    var ?00, ?00, ?0, cos?0, sin?0;

    d3_geo_area.point = function(?, ?) {

      d3_geo_area.point = nextPoint;

      ?0 = (?00 = ?) * d3_radians, cos?0 = Math.cos(? = (?00 = ?) * d3_radians / 2 + ? / 4),

      sin?0 = Math.sin(?);

    };

    function nextPoint(?, ?) {

      ? *= d3_radians;

      ? = ? * d3_radians / 2 + ? / 4;

      var d? = ? - ?0, sd? = d? >= 0 ? 1 : -1, ad? = sd? * d?, cos? = Math.cos(?), sin? = Math.sin(?), k = sin?0 * sin?, u = cos?0 * cos? + k * Math.cos(ad?), v = k * sd? * Math.sin(ad?);

      d3_geo_areaRingSum.add(Math.atan2(v, u));

      ?0 = ?, cos?0 = cos?, sin?0 = sin?;

    }

    d3_geo_area.lineEnd = function() {

      nextPoint(?00, ?00);

    };

  }

  function d3_geo_cartesian(spherical) {

    var ? = spherical[0], ? = spherical[1], cos? = Math.cos(?);

    return [ cos? * Math.cos(?), cos? * Math.sin(?), Math.sin(?) ];

  }

  function d3_geo_cartesianDot(a, b) {

    return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];

  }

  function d3_geo_cartesianCross(a, b) {

    return [ a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0] ];

  }

  function d3_geo_cartesianAdd(a, b) {

    a[0] += b[0];

    a[1] += b[1];

    a[2] += b[2];

  }

  function d3_geo_cartesianScale(vector, k) {

    return [ vector[0] * k, vector[1] * k, vector[2] * k ];

  }

  function d3_geo_cartesianNormalize(d) {

    var l = Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);

    d[0] /= l;

    d[1] /= l;

    d[2] /= l;

  }

  function d3_geo_spherical(cartesian) {

    return [ Math.atan2(cartesian[1], cartesian[0]), d3_asin(cartesian[2]) ];

  }

  function d3_geo_sphericalEqual(a, b) {

    return abs(a[0] - b[0]) < ? && abs(a[1] - b[1]) < ?;

  }

  d3.geo.bounds = function() {

    var ?0, ?0, ?1, ?1, ?_, ?__, ?__, p0, d?Sum, ranges, range;

    var bound = {

      point: point,

      lineStart: lineStart,

      lineEnd: lineEnd,

      polygonStart: function() {

        bound.point = ringPoint;

        bound.lineStart = ringStart;

        bound.lineEnd = ringEnd;

        d?Sum = 0;

        d3_geo_area.polygonStart();

      },

      polygonEnd: function() {

        d3_geo_area.polygonEnd();

        bound.point = point;

        bound.lineStart = lineStart;

        bound.lineEnd = lineEnd;

        if (d3_geo_areaRingSum < 0) ?0 = -(?1 = 180), ?0 = -(?1 = 90); else if (d?Sum > ?) ?1 = 90; else if (d?Sum < -?) ?0 = -90;

        range[0] = ?0, range[1] = ?1;

      }

    };

    function point(?, ?) {

      ranges.push(range = [ ?0 = ?, ?1 = ? ]);

      if (? < ?0) ?0 = ?;

      if (? > ?1) ?1 = ?;

    }

    function linePoint(?, ?) {

      var p = d3_geo_cartesian([ ? * d3_radians, ? * d3_radians ]);

      if (p0) {

        var normal = d3_geo_cartesianCross(p0, p), equatorial = [ normal[1], -normal[0], 0 ], inflection = d3_geo_cartesianCross(equatorial, normal);

        d3_geo_cartesianNormalize(inflection);

        inflection = d3_geo_spherical(inflection);

        var d? = ? - ?_, s = d? > 0 ? 1 : -1, ?i = inflection[0] * d3_degrees * s, antimeridian = abs(d?) > 180;

        if (antimeridian ^ (s * ?_ < ?i && ?i < s * ?)) {

          var ?i = inflection[1] * d3_degrees;

          if (?i > ?1) ?1 = ?i;

        } else if (?i = (?i + 360) % 360 - 180, antimeridian ^ (s * ?_ < ?i && ?i < s * ?)) {

          var ?i = -inflection[1] * d3_degrees;

          if (?i < ?0) ?0 = ?i;

        } else {

          if (? < ?0) ?0 = ?;

          if (? > ?1) ?1 = ?;

        }

        if (antimeridian) {

          if (? < ?_) {

            if (angle(?0, ?) > angle(?0, ?1)) ?1 = ?;

          } else {

            if (angle(?, ?1) > angle(?0, ?1)) ?0 = ?;

          }

        } else {

          if (?1 >= ?0) {

            if (? < ?0) ?0 = ?;

            if (? > ?1) ?1 = ?;

          } else {

            if (? > ?_) {

              if (angle(?0, ?) > angle(?0, ?1)) ?1 = ?;

            } else {

              if (angle(?, ?1) > angle(?0, ?1)) ?0 = ?;

            }

          }

        }

      } else {

        point(?, ?);

      }

      p0 = p, ?_ = ?;

    }

    function lineStart() {

      bound.point = linePoint;

    }

    function lineEnd() {

      range[0] = ?0, range[1] = ?1;

      bound.point = point;

      p0 = null;

    }

    function ringPoint(?, ?) {

      if (p0) {

        var d? = ? - ?_;

        d?Sum += abs(d?) > 180 ? d? + (d? > 0 ? 360 : -360) : d?;

      } else ?__ = ?, ?__ = ?;

      d3_geo_area.point(?, ?);

      linePoint(?, ?);

    }

    function ringStart() {

      d3_geo_area.lineStart();

    }

    function ringEnd() {

      ringPoint(?__, ?__);

      d3_geo_area.lineEnd();

      if (abs(d?Sum) > ?) ?0 = -(?1 = 180);

      range[0] = ?0, range[1] = ?1;

      p0 = null;

    }

    function angle(?0, ?1) {

      return (?1 -= ?0) < 0 ? ?1 + 360 : ?1;

    }

    function compareRanges(a, b) {

      return a[0] - b[0];

    }

    function withinRange(x, range) {

      return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;

    }

    return function(feature) {

      ?1 = ?1 = -(?0 = ?0 = Infinity);

      ranges = [];

      d3.geo.stream(feature, bound);

      var n = ranges.length;

      if (n) {

        ranges.sort(compareRanges);

        for (var i = 1, a = ranges[0], b, merged = [ a ]; i < n; ++i) {

          b = ranges[i];

          if (withinRange(b[0], a) || withinRange(b[1], a)) {

            if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];

            if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];

          } else {

            merged.push(a = b);

          }

        }

        var best = -Infinity, d?;

        for (var n = merged.length - 1, i = 0, a = merged[n], b; i <= n; a = b, ++i) {

          b = merged[i];

          if ((d? = angle(a[1], b[0])) > best) best = d?, ?0 = b[0], ?1 = a[1];

        }

      }

      ranges = range = null;

      return ?0 === Infinity || ?0 === Infinity ? [ [ NaN, NaN ], [ NaN, NaN ] ] : [ [ ?0, ?0 ], [ ?1, ?1 ] ];

    };

  }();

  d3.geo.centroid = function(object) {

    d3_geo_centroidW0 = d3_geo_centroidW1 = d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;

    d3.geo.stream(object, d3_geo_centroid);

    var x = d3_geo_centroidX2, y = d3_geo_centroidY2, z = d3_geo_centroidZ2, m = x * x + y * y + z * z;

    if (m < ?2) {

      x = d3_geo_centroidX1, y = d3_geo_centroidY1, z = d3_geo_centroidZ1;

      if (d3_geo_centroidW1 < ?) x = d3_geo_centroidX0, y = d3_geo_centroidY0, z = d3_geo_centroidZ0;

      m = x * x + y * y + z * z;

      if (m < ?2) return [ NaN, NaN ];

    }

    return [ Math.atan2(y, x) * d3_degrees, d3_asin(z / Math.sqrt(m)) * d3_degrees ];

  };

  var d3_geo_centroidW0, d3_geo_centroidW1, d3_geo_centroidX0, d3_geo_centroidY0, d3_geo_centroidZ0, d3_geo_centroidX1, d3_geo_centroidY1, d3_geo_centroidZ1, d3_geo_centroidX2, d3_geo_centroidY2, d3_geo_centroidZ2;

  var d3_geo_centroid = {

    sphere: d3_noop,

    point: d3_geo_centroidPoint,

    lineStart: d3_geo_centroidLineStart,

    lineEnd: d3_geo_centroidLineEnd,

    polygonStart: function() {

      d3_geo_centroid.lineStart = d3_geo_centroidRingStart;

    },

    polygonEnd: function() {

      d3_geo_centroid.lineStart = d3_geo_centroidLineStart;

    }

  };

  function d3_geo_centroidPoint(?, ?) {

    ? *= d3_radians;

    var cos? = Math.cos(? *= d3_radians);

    d3_geo_centroidPointXYZ(cos? * Math.cos(?), cos? * Math.sin(?), Math.sin(?));

  }

  function d3_geo_centroidPointXYZ(x, y, z) {

    ++d3_geo_centroidW0;

    d3_geo_centroidX0 += (x - d3_geo_centroidX0) / d3_geo_centroidW0;

    d3_geo_centroidY0 += (y - d3_geo_centroidY0) / d3_geo_centroidW0;

    d3_geo_centroidZ0 += (z - d3_geo_centroidZ0) / d3_geo_centroidW0;

  }

  function d3_geo_centroidLineStart() {

    var x0, y0, z0;

    d3_geo_centroid.point = function(?, ?) {

      ? *= d3_radians;

      var cos? = Math.cos(? *= d3_radians);

      x0 = cos? * Math.cos(?);

      y0 = cos? * Math.sin(?);

      z0 = Math.sin(?);

      d3_geo_centroid.point = nextPoint;

      d3_geo_centroidPointXYZ(x0, y0, z0);

    };

    function nextPoint(?, ?) {

      ? *= d3_radians;

      var cos? = Math.cos(? *= d3_radians), x = cos? * Math.cos(?), y = cos? * Math.sin(?), z = Math.sin(?), w = Math.atan2(Math.sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);

      d3_geo_centroidW1 += w;

      d3_geo_centroidX1 += w * (x0 + (x0 = x));

      d3_geo_centroidY1 += w * (y0 + (y0 = y));

      d3_geo_centroidZ1 += w * (z0 + (z0 = z));

      d3_geo_centroidPointXYZ(x0, y0, z0);

    }

  }

  function d3_geo_centroidLineEnd() {

    d3_geo_centroid.point = d3_geo_centroidPoint;

  }

  function d3_geo_centroidRingStart() {

    var ?00, ?00, x0, y0, z0;

    d3_geo_centroid.point = function(?, ?) {

      ?00 = ?, ?00 = ?;

      d3_geo_centroid.point = nextPoint;

      ? *= d3_radians;

      var cos? = Math.cos(? *= d3_radians);

      x0 = cos? * Math.cos(?);

      y0 = cos? * Math.sin(?);

      z0 = Math.sin(?);

      d3_geo_centroidPointXYZ(x0, y0, z0);

    };

    d3_geo_centroid.lineEnd = function() {

      nextPoint(?00, ?00);

      d3_geo_centroid.lineEnd = d3_geo_centroidLineEnd;

      d3_geo_centroid.point = d3_geo_centroidPoint;

    };

    function nextPoint(?, ?) {

      ? *= d3_radians;

      var cos? = Math.cos(? *= d3_radians), x = cos? * Math.cos(?), y = cos? * Math.sin(?), z = Math.sin(?), cx = y0 * z - z0 * y, cy = z0 * x - x0 * z, cz = x0 * y - y0 * x, m = Math.sqrt(cx * cx + cy * cy + cz * cz), u = x0 * x + y0 * y + z0 * z, v = m && -d3_acos(u) / m, w = Math.atan2(m, u);

      d3_geo_centroidX2 += v * cx;

      d3_geo_centroidY2 += v * cy;

      d3_geo_centroidZ2 += v * cz;

      d3_geo_centroidW1 += w;

      d3_geo_centroidX1 += w * (x0 + (x0 = x));

      d3_geo_centroidY1 += w * (y0 + (y0 = y));

      d3_geo_centroidZ1 += w * (z0 + (z0 = z));

      d3_geo_centroidPointXYZ(x0, y0, z0);

    }

  }

  function d3_true() {

    return true;

  }

  function d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener) {

    var subject = [], clip = [];

    segments.forEach(function(segment) {

      if ((n = segment.length - 1) <= 0) return;

      var n, p0 = segment[0], p1 = segment[n];

      if (d3_geo_sphericalEqual(p0, p1)) {

        listener.lineStart();

        for (var i = 0; i < n; ++i) listener.point((p0 = segment[i])[0], p0[1]);

        listener.lineEnd();

        return;

      }

      var a = new d3_geo_clipPolygonIntersection(p0, segment, null, true), b = new d3_geo_clipPolygonIntersection(p0, null, a, false);

      a.o = b;

      subject.push(a);

      clip.push(b);

      a = new d3_geo_clipPolygonIntersection(p1, segment, null, false);

      b = new d3_geo_clipPolygonIntersection(p1, null, a, true);

      a.o = b;

      subject.push(a);

      clip.push(b);

    });

    clip.sort(compare);

    d3_geo_clipPolygonLinkCircular(subject);

    d3_geo_clipPolygonLinkCircular(clip);

    if (!subject.length) return;

    for (var i = 0, entry = clipStartInside, n = clip.length; i < n; ++i) {

      clip[i].e = entry = !entry;

    }

    var start = subject[0], points, point;

    while (1) {

      var current = start, isSubject = true;

      while (current.v) if ((current = current.n) === start) return;

      points = current.z;

      listener.lineStart();

      do {

        current.v = current.o.v = true;

        if (current.e) {

          if (isSubject) {

            for (var i = 0, n = points.length; i < n; ++i) listener.point((point = points[i])[0], point[1]);

          } else {

            interpolate(current.x, current.n.x, 1, listener);

          }

          current = current.n;

        } else {

          if (isSubject) {

            points = current.p.z;

            for (var i = points.length - 1; i >= 0; --i) listener.point((point = points[i])[0], point[1]);

          } else {

            interpolate(current.x, current.p.x, -1, listener);

          }

          current = current.p;

        }

        current = current.o;

        points = current.z;

        isSubject = !isSubject;

      } while (!current.v);

      listener.lineEnd();

    }

  }

  function d3_geo_clipPolygonLinkCircular(array) {

    if (!(n = array.length)) return;

    var n, i = 0, a = array[0], b;

    while (++i < n) {

      a.n = b = array[i];

      b.p = a;

      a = b;

    }

    a.n = b = array[0];

    b.p = a;

  }

  function d3_geo_clipPolygonIntersection(point, points, other, entry) {

    this.x = point;

    this.z = points;

    this.o = other;

    this.e = entry;

    this.v = false;

    this.n = this.p = null;

  }

  function d3_geo_clip(pointVisible, clipLine, interpolate, clipStart) {

    return function(rotate, listener) {

      var line = clipLine(listener), rotatedClipStart = rotate.invert(clipStart[0], clipStart[1]);

      var clip = {

        point: point,

        lineStart: lineStart,

        lineEnd: lineEnd,

        polygonStart: function() {

          clip.point = pointRing;

          clip.lineStart = ringStart;

          clip.lineEnd = ringEnd;

          segments = [];

          polygon = [];

        },

        polygonEnd: function() {

          clip.point = point;

          clip.lineStart = lineStart;

          clip.lineEnd = lineEnd;

          segments = d3.merge(segments);

          var clipStartInside = d3_geo_pointInPolygon(rotatedClipStart, polygon);

          if (segments.length) {

            if (!polygonStarted) listener.polygonStart(), polygonStarted = true;

            d3_geo_clipPolygon(segments, d3_geo_clipSort, clipStartInside, interpolate, listener);

          } else if (clipStartInside) {

            if (!polygonStarted) listener.polygonStart(), polygonStarted = true;

            listener.lineStart();

            interpolate(null, null, 1, listener);

            listener.lineEnd();

          }

          if (polygonStarted) listener.polygonEnd(), polygonStarted = false;

          segments = polygon = null;

        },

        sphere: function() {

          listener.polygonStart();

          listener.lineStart();

          interpolate(null, null, 1, listener);

          listener.lineEnd();

          listener.polygonEnd();

        }

      };

      function point(?, ?) {

        var point = rotate(?, ?);

        if (pointVisible(? = point[0], ? = point[1])) listener.point(?, ?);

      }

      function pointLine(?, ?) {

        var point = rotate(?, ?);

        line.point(point[0], point[1]);

      }

      function lineStart() {

        clip.point = pointLine;

        line.lineStart();

      }

      function lineEnd() {

        clip.point = point;

        line.lineEnd();

      }

      var segments;

      var buffer = d3_geo_clipBufferListener(), ringListener = clipLine(buffer), polygonStarted = false, polygon, ring;

      function pointRing(?, ?) {

        ring.push([ ?, ? ]);

        var point = rotate(?, ?);

        ringListener.point(point[0], point[1]);

      }

      function ringStart() {

        ringListener.lineStart();

        ring = [];

      }

      function ringEnd() {

        pointRing(ring[0][0], ring[0][1]);

        ringListener.lineEnd();

        var clean = ringListener.clean(), ringSegments = buffer.buffer(), segment, n = ringSegments.length;

        ring.pop();

        polygon.push(ring);

        ring = null;

        if (!n) return;

        if (clean & 1) {

          segment = ringSegments[0];

          var n = segment.length - 1, i = -1, point;

          if (n > 0) {

            if (!polygonStarted) listener.polygonStart(), polygonStarted = true;

            listener.lineStart();

            while (++i < n) listener.point((point = segment[i])[0], point[1]);

            listener.lineEnd();

          }

          return;

        }

        if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

        segments.push(ringSegments.filter(d3_geo_clipSegmentLength1));

      }

      return clip;

    };

  }

  function d3_geo_clipSegmentLength1(segment) {

    return segment.length > 1;

  }

  function d3_geo_clipBufferListener() {

    var lines = [], line;

    return {

      lineStart: function() {

        lines.push(line = []);

      },

      point: function(?, ?) {

        line.push([ ?, ? ]);

      },

      lineEnd: d3_noop,

      buffer: function() {

        var buffer = lines;

        lines = [];

        line = null;

        return buffer;

      },

      rejoin: function() {

        if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));

      }

    };

  }

  function d3_geo_clipSort(a, b) {

    return ((a = a.x)[0] < 0 ? a[1] - half? - ? : half? - a[1]) - ((b = b.x)[0] < 0 ? b[1] - half? - ? : half? - b[1]);

  }

  function d3_geo_pointInPolygon(point, polygon) {

    var meridian = point[0], parallel = point[1], meridianNormal = [ Math.sin(meridian), -Math.cos(meridian), 0 ], polarAngle = 0, winding = 0;

    d3_geo_areaRingSum.reset();

    for (var i = 0, n = polygon.length; i < n; ++i) {

      var ring = polygon[i], m = ring.length;

      if (!m) continue;

      var point0 = ring[0], ?0 = point0[0], ?0 = point0[1] / 2 + ? / 4, sin?0 = Math.sin(?0), cos?0 = Math.cos(?0), j = 1;

      while (true) {

        if (j === m) j = 0;

        point = ring[j];

        var ? = point[0], ? = point[1] / 2 + ? / 4, sin? = Math.sin(?), cos? = Math.cos(?), d? = ? - ?0, sd? = d? >= 0 ? 1 : -1, ad? = sd? * d?, antimeridian = ad? > ?, k = sin?0 * sin?;

        d3_geo_areaRingSum.add(Math.atan2(k * sd? * Math.sin(ad?), cos?0 * cos? + k * Math.cos(ad?)));

        polarAngle += antimeridian ? d? + sd? * ? : d?;

        if (antimeridian ^ ?0 >= meridian ^ ? >= meridian) {

          var arc = d3_geo_cartesianCross(d3_geo_cartesian(point0), d3_geo_cartesian(point));

          d3_geo_cartesianNormalize(arc);

          var intersection = d3_geo_cartesianCross(meridianNormal, arc);

          d3_geo_cartesianNormalize(intersection);

          var ?arc = (antimeridian ^ d? >= 0 ? -1 : 1) * d3_asin(intersection[2]);

          if (parallel > ?arc || parallel === ?arc && (arc[0] || arc[1])) {

            winding += antimeridian ^ d? >= 0 ? 1 : -1;

          }

        }

        if (!j++) break;

        ?0 = ?, sin?0 = sin?, cos?0 = cos?, point0 = point;

      }

    }

    return (polarAngle < -? || polarAngle < ? && d3_geo_areaRingSum < 0) ^ winding & 1;

  }

  var d3_geo_clipAntimeridian = d3_geo_clip(d3_true, d3_geo_clipAntimeridianLine, d3_geo_clipAntimeridianInterpolate, [ -?, -? / 2 ]);

  function d3_geo_clipAntimeridianLine(listener) {

    var ?0 = NaN, ?0 = NaN, s?0 = NaN, clean;

    return {

      lineStart: function() {

        listener.lineStart();

        clean = 1;

      },

      point: function(?1, ?1) {

        var s?1 = ?1 > 0 ? ? : -?, d? = abs(?1 - ?0);

        if (abs(d? - ?) < ?) {

          listener.point(?0, ?0 = (?0 + ?1) / 2 > 0 ? half? : -half?);

          listener.point(s?0, ?0);

          listener.lineEnd();

          listener.lineStart();

          listener.point(s?1, ?0);

          listener.point(?1, ?0);

          clean = 0;

        } else if (s?0 !== s?1 && d? >= ?) {

          if (abs(?0 - s?0) < ?) ?0 -= s?0 * ?;

          if (abs(?1 - s?1) < ?) ?1 -= s?1 * ?;

          ?0 = d3_geo_clipAntimeridianIntersect(?0, ?0, ?1, ?1);

          listener.point(s?0, ?0);

          listener.lineEnd();

          listener.lineStart();

          listener.point(s?1, ?0);

          clean = 0;

        }

        listener.point(?0 = ?1, ?0 = ?1);

        s?0 = s?1;

      },

      lineEnd: function() {

        listener.lineEnd();

        ?0 = ?0 = NaN;

      },

      clean: function() {

        return 2 - clean;

      }

    };

  }

  function d3_geo_clipAntimeridianIntersect(?0, ?0, ?1, ?1) {

    var cos?0, cos?1, sin?0_?1 = Math.sin(?0 - ?1);

    return abs(sin?0_?1) > ? ? Math.atan((Math.sin(?0) * (cos?1 = Math.cos(?1)) * Math.sin(?1) - Math.sin(?1) * (cos?0 = Math.cos(?0)) * Math.sin(?0)) / (cos?0 * cos?1 * sin?0_?1)) : (?0 + ?1) / 2;

  }

  function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) {

    var ?;

    if (from == null) {

      ? = direction * half?;

      listener.point(-?, ?);

      listener.point(0, ?);

      listener.point(?, ?);

      listener.point(?, 0);

      listener.point(?, -?);

      listener.point(0, -?);

      listener.point(-?, -?);

      listener.point(-?, 0);

      listener.point(-?, ?);

    } else if (abs(from[0] - to[0]) > ?) {

      var s = from[0] < to[0] ? ? : -?;

      ? = direction * s / 2;

      listener.point(-s, ?);

      listener.point(0, ?);

      listener.point(s, ?);

    } else {

      listener.point(to[0], to[1]);

    }

  }

  function d3_geo_clipCircle(radius) {

    var cr = Math.cos(radius), smallRadius = cr > 0, notHemisphere = abs(cr) > ?, interpolate = d3_geo_circleInterpolate(radius, 6 * d3_radians);

    return d3_geo_clip(visible, clipLine, interpolate, smallRadius ? [ 0, -radius ] : [ -?, radius - ? ]);

    function visible(?, ?) {

      return Math.cos(?) * Math.cos(?) > cr;

    }

    function clipLine(listener) {

      var point0, c0, v0, v00, clean;

      return {

        lineStart: function() {

          v00 = v0 = false;

          clean = 1;

        },

        point: function(?, ?) {

          var point1 = [ ?, ? ], point2, v = visible(?, ?), c = smallRadius ? v ? 0 : code(?, ?) : v ? code(? + (? < 0 ? ? : -?), ?) : 0;

          if (!point0 && (v00 = v0 = v)) listener.lineStart();

          if (v !== v0) {

            point2 = intersect(point0, point1);

            if (d3_geo_sphericalEqual(point0, point2) || d3_geo_sphericalEqual(point1, point2)) {

              point1[0] += ?;

              point1[1] += ?;

              v = visible(point1[0], point1[1]);

            }

          }

          if (v !== v0) {

            clean = 0;

            if (v) {

              listener.lineStart();

              point2 = intersect(point1, point0);

              listener.point(point2[0], point2[1]);

            } else {

              point2 = intersect(point0, point1);

              listener.point(point2[0], point2[1]);

              listener.lineEnd();

            }

            point0 = point2;

          } else if (notHemisphere && point0 && smallRadius ^ v) {

            var t;

            if (!(c & c0) && (t = intersect(point1, point0, true))) {

              clean = 0;

              if (smallRadius) {

                listener.lineStart();

                listener.point(t[0][0], t[0][1]);

                listener.point(t[1][0], t[1][1]);

                listener.lineEnd();

              } else {

                listener.point(t[1][0], t[1][1]);

                listener.lineEnd();

                listener.lineStart();

                listener.point(t[0][0], t[0][1]);

              }

            }

          }

          if (v && (!point0 || !d3_geo_sphericalEqual(point0, point1))) {

            listener.point(point1[0], point1[1]);

          }

          point0 = point1, v0 = v, c0 = c;

        },

        lineEnd: function() {

          if (v0) listener.lineEnd();

          point0 = null;

        },

        clean: function() {

          return clean | (v00 && v0) << 1;

        }

      };

    }

    function intersect(a, b, two) {

      var pa = d3_geo_cartesian(a), pb = d3_geo_cartesian(b);

      var n1 = [ 1, 0, 0 ], n2 = d3_geo_cartesianCross(pa, pb), n2n2 = d3_geo_cartesianDot(n2, n2), n1n2 = n2[0], determinant = n2n2 - n1n2 * n1n2;

      if (!determinant) return !two && a;

      var c1 = cr * n2n2 / determinant, c2 = -cr * n1n2 / determinant, n1xn2 = d3_geo_cartesianCross(n1, n2), A = d3_geo_cartesianScale(n1, c1), B = d3_geo_cartesianScale(n2, c2);

      d3_geo_cartesianAdd(A, B);

      var u = n1xn2, w = d3_geo_cartesianDot(A, u), uu = d3_geo_cartesianDot(u, u), t2 = w * w - uu * (d3_geo_cartesianDot(A, A) - 1);

      if (t2 < 0) return;

      var t = Math.sqrt(t2), q = d3_geo_cartesianScale(u, (-w - t) / uu);

      d3_geo_cartesianAdd(q, A);

      q = d3_geo_spherical(q);

      if (!two) return q;

      var ?0 = a[0], ?1 = b[0], ?0 = a[1], ?1 = b[1], z;

      if (?1 < ?0) z = ?0, ?0 = ?1, ?1 = z;

      var ?? = ?1 - ?0, polar = abs(?? - ?) < ?, meridian = polar || ?? < ?;

      if (!polar && ?1 < ?0) z = ?0, ?0 = ?1, ?1 = z;

      if (meridian ? polar ? ?0 + ?1 > 0 ^ q[1] < (abs(q[0] - ?0) < ? ? ?0 : ?1) : ?0 <= q[1] && q[1] <= ?1 : ?? > ? ^ (?0 <= q[0] && q[0] <= ?1)) {

        var q1 = d3_geo_cartesianScale(u, (-w + t) / uu);

        d3_geo_cartesianAdd(q1, A);

        return [ q, d3_geo_spherical(q1) ];

      }

    }

    function code(?, ?) {

      var r = smallRadius ? radius : ? - radius, code = 0;

      if (? < -r) code |= 1; else if (? > r) code |= 2;

      if (? < -r) code |= 4; else if (? > r) code |= 8;

      return code;

    }

  }

  function d3_geom_clipLine(x0, y0, x1, y1) {

    return function(line) {

      var a = line.a, b = line.b, ax = a.x, ay = a.y, bx = b.x, by = b.y, t0 = 0, t1 = 1, dx = bx - ax, dy = by - ay, r;

      r = x0 - ax;

      if (!dx && r > 0) return;

      r /= dx;

      if (dx < 0) {

        if (r < t0) return;

        if (r < t1) t1 = r;

      } else if (dx > 0) {

        if (r > t1) return;

        if (r > t0) t0 = r;

      }

      r = x1 - ax;

      if (!dx && r < 0) return;

      r /= dx;

      if (dx < 0) {

        if (r > t1) return;

        if (r > t0) t0 = r;

      } else if (dx > 0) {

        if (r < t0) return;

        if (r < t1) t1 = r;

      }

      r = y0 - ay;

      if (!dy && r > 0) return;

      r /= dy;

      if (dy < 0) {

        if (r < t0) return;

        if (r < t1) t1 = r;

      } else if (dy > 0) {

        if (r > t1) return;

        if (r > t0) t0 = r;

      }

      r = y1 - ay;

      if (!dy && r < 0) return;

      r /= dy;

      if (dy < 0) {

        if (r > t1) return;

        if (r > t0) t0 = r;

      } else if (dy > 0) {

        if (r < t0) return;

        if (r < t1) t1 = r;

      }

      if (t0 > 0) line.a = {

        x: ax + t0 * dx,

        y: ay + t0 * dy

      };

      if (t1 < 1) line.b = {

        x: ax + t1 * dx,

        y: ay + t1 * dy

      };

      return line;

    };

  }

  var d3_geo_clipExtentMAX = 1e9;

  d3.geo.clipExtent = function() {

    var x0, y0, x1, y1, stream, clip, clipExtent = {

      stream: function(output) {

        if (stream) stream.valid = false;

        stream = clip(output);

        stream.valid = true;

        return stream;

      },

      extent: function(_) {

        if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];

        clip = d3_geo_clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]);

        if (stream) stream.valid = false, stream = null;

        return clipExtent;

      }

    };

    return clipExtent.extent([ [ 0, 0 ], [ 960, 500 ] ]);

  };

  function d3_geo_clipExtent(x0, y0, x1, y1) {

    return function(listener) {

      var listener_ = listener, bufferListener = d3_geo_clipBufferListener(), clipLine = d3_geom_clipLine(x0, y0, x1, y1), segments, polygon, ring;

      var clip = {

        point: point,

        lineStart: lineStart,

        lineEnd: lineEnd,

        polygonStart: function() {

          listener = bufferListener;

          segments = [];

          polygon = [];

          clean = true;

        },

        polygonEnd: function() {

          listener = listener_;

          segments = d3.merge(segments);

          var clipStartInside = insidePolygon([ x0, y1 ]), inside = clean && clipStartInside, visible = segments.length;

          if (inside || visible) {

            listener.polygonStart();

            if (inside) {

              listener.lineStart();

              interpolate(null, null, 1, listener);

              listener.lineEnd();

            }

            if (visible) {

              d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener);

            }

            listener.polygonEnd();

          }

          segments = polygon = ring = null;

        }

      };

      function insidePolygon(p) {

        var wn = 0, n = polygon.length, y = p[1];

        for (var i = 0; i < n; ++i) {

          for (var j = 1, v = polygon[i], m = v.length, a = v[0], b; j < m; ++j) {

            b = v[j];

            if (a[1] <= y) {

              if (b[1] > y && d3_cross2d(a, b, p) > 0) ++wn;

            } else {

              if (b[1] <= y && d3_cross2d(a, b, p) < 0) --wn;

            }

            a = b;

          }

        }

        return wn !== 0;

      }

      function interpolate(from, to, direction, listener) {

        var a = 0, a1 = 0;

        if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoints(from, to) < 0 ^ direction > 0) {

          do {

            listener.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);

          } while ((a = (a + direction + 4) % 4) !== a1);

        } else {

          listener.point(to[0], to[1]);

        }

      }

      function pointVisible(x, y) {

        return x0 <= x && x <= x1 && y0 <= y && y <= y1;

      }

      function point(x, y) {

        if (pointVisible(x, y)) listener.point(x, y);

      }

      var x__, y__, v__, x_, y_, v_, first, clean;

      function lineStart() {

        clip.point = linePoint;

        if (polygon) polygon.push(ring = []);

        first = true;

        v_ = false;

        x_ = y_ = NaN;

      }

      function lineEnd() {

        if (segments) {

          linePoint(x__, y__);

          if (v__ && v_) bufferListener.rejoin();

          segments.push(bufferListener.buffer());

        }

        clip.point = point;

        if (v_) listener.lineEnd();

      }

      function linePoint(x, y) {

        x = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, x));

        y = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, y));

        var v = pointVisible(x, y);

        if (polygon) ring.push([ x, y ]);

        if (first) {

          x__ = x, y__ = y, v__ = v;

          first = false;

          if (v) {

            listener.lineStart();

            listener.point(x, y);

          }

        } else {

          if (v && v_) listener.point(x, y); else {

            var l = {

              a: {

                x: x_,

                y: y_

              },

              b: {

                x: x,

                y: y

              }

            };

            if (clipLine(l)) {

              if (!v_) {

                listener.lineStart();

                listener.point(l.a.x, l.a.y);

              }

              listener.point(l.b.x, l.b.y);

              if (!v) listener.lineEnd();

              clean = false;

            } else if (v) {

              listener.lineStart();

              listener.point(x, y);

              clean = false;

            }

          }

        }

        x_ = x, y_ = y, v_ = v;

      }

      return clip;

    };

    function corner(p, direction) {

      return abs(p[0] - x0) < ? ? direction > 0 ? 0 : 3 : abs(p[0] - x1) < ? ? direction > 0 ? 2 : 1 : abs(p[1] - y0) < ? ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2;

    }

    function compare(a, b) {

      return comparePoints(a.x, b.x);

    }

    function comparePoints(a, b) {

      var ca = corner(a, 1), cb = corner(b, 1);

      return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];

    }

  }

  function d3_geo_compose(a, b) {

    function compose(x, y) {

      return x = a(x, y), b(x[0], x[1]);

    }

    if (a.invert && b.invert) compose.invert = function(x, y) {

      return x = b.invert(x, y), x && a.invert(x[0], x[1]);

    };

    return compose;

  }

  function d3_geo_conic(projectAt) {

    var ?0 = 0, ?1 = ? / 3, m = d3_geo_projectionMutator(projectAt), p = m(?0, ?1);

    p.parallels = function(_) {

      if (!arguments.length) return [ ?0 / ? * 180, ?1 / ? * 180 ];

      return m(?0 = _[0] * ? / 180, ?1 = _[1] * ? / 180);

    };

    return p;

  }

  function d3_geo_conicEqualArea(?0, ?1) {

    var sin?0 = Math.sin(?0), n = (sin?0 + Math.sin(?1)) / 2, C = 1 + sin?0 * (2 * n - sin?0), ?0 = Math.sqrt(C) / n;

    function forward(?, ?) {

      var ? = Math.sqrt(C - 2 * n * Math.sin(?)) / n;

      return [ ? * Math.sin(? *= n), ?0 - ? * Math.cos(?) ];

    }

    forward.invert = function(x, y) {

      var ?0_y = ?0 - y;

      return [ Math.atan2(x, ?0_y) / n, d3_asin((C - (x * x + ?0_y * ?0_y) * n * n) / (2 * n)) ];

    };

    return forward;

  }

  (d3.geo.conicEqualArea = function() {

    return d3_geo_conic(d3_geo_conicEqualArea);

  }).raw = d3_geo_conicEqualArea;

  d3.geo.albers = function() {

    return d3.geo.conicEqualArea().rotate([ 96, 0 ]).center([ -.6, 38.7 ]).parallels([ 29.5, 45.5 ]).scale(1070);

  };

  d3.geo.albersUsa = function() {

    var lower48 = d3.geo.albers();

    var alaska = d3.geo.conicEqualArea().rotate([ 154, 0 ]).center([ -2, 58.5 ]).parallels([ 55, 65 ]);

    var hawaii = d3.geo.conicEqualArea().rotate([ 157, 0 ]).center([ -3, 19.9 ]).parallels([ 8, 18 ]);

    var point, pointStream = {

      point: function(x, y) {

        point = [ x, y ];

      }

    }, lower48Point, alaskaPoint, hawaiiPoint;

    function albersUsa(coordinates) {

      var x = coordinates[0], y = coordinates[1];

      point = null;

      (lower48Point(x, y), point) || (alaskaPoint(x, y), point) || hawaiiPoint(x, y);

      return point;

    }

    albersUsa.invert = function(coordinates) {

      var k = lower48.scale(), t = lower48.translate(), x = (coordinates[0] - t[0]) / k, y = (coordinates[1] - t[1]) / k;

      return (y >= .12 && y < .234 && x >= -.425 && x < -.214 ? alaska : y >= .166 && y < .234 && x >= -.214 && x < -.115 ? hawaii : lower48).invert(coordinates);

    };

    albersUsa.stream = function(stream) {

      var lower48Stream = lower48.stream(stream), alaskaStream = alaska.stream(stream), hawaiiStream = hawaii.stream(stream);

      return {

        point: function(x, y) {

          lower48Stream.point(x, y);

          alaskaStream.point(x, y);

          hawaiiStream.point(x, y);

        },

        sphere: function() {

          lower48Stream.sphere();

          alaskaStream.sphere();

          hawaiiStream.sphere();

        },

        lineStart: function() {

          lower48Stream.lineStart();

          alaskaStream.lineStart();

          hawaiiStream.lineStart();

        },

        lineEnd: function() {

          lower48Stream.lineEnd();

          alaskaStream.lineEnd();

          hawaiiStream.lineEnd();

        },

        polygonStart: function() {

          lower48Stream.polygonStart();

          alaskaStream.polygonStart();

          hawaiiStream.polygonStart();

        },

        polygonEnd: function() {

          lower48Stream.polygonEnd();

          alaskaStream.polygonEnd();

          hawaiiStream.polygonEnd();

        }

      };

    };

    albersUsa.precision = function(_) {

      if (!arguments.length) return lower48.precision();

      lower48.precision(_);

      alaska.precision(_);

      hawaii.precision(_);

      return albersUsa;

    };

    albersUsa.scale = function(_) {

      if (!arguments.length) return lower48.scale();

      lower48.scale(_);

      alaska.scale(_ * .35);

      hawaii.scale(_);

      return albersUsa.translate(lower48.translate());

    };

    albersUsa.translate = function(_) {

      if (!arguments.length) return lower48.translate();

      var k = lower48.scale(), x = +_[0], y = +_[1];

      lower48Point = lower48.translate(_).clipExtent([ [ x - .455 * k, y - .238 * k ], [ x + .455 * k, y + .238 * k ] ]).stream(pointStream).point;

      alaskaPoint = alaska.translate([ x - .307 * k, y + .201 * k ]).clipExtent([ [ x - .425 * k + ?, y + .12 * k + ? ], [ x - .214 * k - ?, y + .234 * k - ? ] ]).stream(pointStream).point;

      hawaiiPoint = hawaii.translate([ x - .205 * k, y + .212 * k ]).clipExtent([ [ x - .214 * k + ?, y + .166 * k + ? ], [ x - .115 * k - ?, y + .234 * k - ? ] ]).stream(pointStream).point;

      return albersUsa;

    };

    return albersUsa.scale(1070);

  };

  var d3_geo_pathAreaSum, d3_geo_pathAreaPolygon, d3_geo_pathArea = {

    point: d3_noop,

    lineStart: d3_noop,

    lineEnd: d3_noop,

    polygonStart: function() {

      d3_geo_pathAreaPolygon = 0;

      d3_geo_pathArea.lineStart = d3_geo_pathAreaRingStart;

    },

    polygonEnd: function() {

      d3_geo_pathArea.lineStart = d3_geo_pathArea.lineEnd = d3_geo_pathArea.point = d3_noop;

      d3_geo_pathAreaSum += abs(d3_geo_pathAreaPolygon / 2);

    }

  };

  function d3_geo_pathAreaRingStart() {

    var x00, y00, x0, y0;

    d3_geo_pathArea.point = function(x, y) {

      d3_geo_pathArea.point = nextPoint;

      x00 = x0 = x, y00 = y0 = y;

    };

    function nextPoint(x, y) {

      d3_geo_pathAreaPolygon += y0 * x - x0 * y;

      x0 = x, y0 = y;

    }

    d3_geo_pathArea.lineEnd = function() {

      nextPoint(x00, y00);

    };

  }

  var d3_geo_pathBoundsX0, d3_geo_pathBoundsY0, d3_geo_pathBoundsX1, d3_geo_pathBoundsY1;

  var d3_geo_pathBounds = {

    point: d3_geo_pathBoundsPoint,

    lineStart: d3_noop,

    lineEnd: d3_noop,

    polygonStart: d3_noop,

    polygonEnd: d3_noop

  };

  function d3_geo_pathBoundsPoint(x, y) {

    if (x < d3_geo_pathBoundsX0) d3_geo_pathBoundsX0 = x;

    if (x > d3_geo_pathBoundsX1) d3_geo_pathBoundsX1 = x;

    if (y < d3_geo_pathBoundsY0) d3_geo_pathBoundsY0 = y;

    if (y > d3_geo_pathBoundsY1) d3_geo_pathBoundsY1 = y;

  }

  function d3_geo_pathBuffer() {

    var pointCircle = d3_geo_pathBufferCircle(4.5), buffer = [];

    var stream = {

      point: point,

      lineStart: function() {

        stream.point = pointLineStart;

      },

      lineEnd: lineEnd,

      polygonStart: function() {

        stream.lineEnd = lineEndPolygon;

      },

      polygonEnd: function() {

        stream.lineEnd = lineEnd;

        stream.point = point;

      },

      pointRadius: function(_) {

        pointCircle = d3_geo_pathBufferCircle(_);

        return stream;

      },

      result: function() {

        if (buffer.length) {

          var result = buffer.join("");

          buffer = [];

          return result;

        }

      }

    };

    function point(x, y) {

      buffer.push("M", x, ",", y, pointCircle);

    }

    function pointLineStart(x, y) {

      buffer.push("M", x, ",", y);

      stream.point = pointLine;

    }

    function pointLine(x, y) {

      buffer.push("L", x, ",", y);

    }

    function lineEnd() {

      stream.point = point;

    }

    function lineEndPolygon() {

      buffer.push("Z");

    }

    return stream;

  }

  function d3_geo_pathBufferCircle(radius) {

    return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";

  }

  var d3_geo_pathCentroid = {

    point: d3_geo_pathCentroidPoint,

    lineStart: d3_geo_pathCentroidLineStart,

    lineEnd: d3_geo_pathCentroidLineEnd,

    polygonStart: function() {

      d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidRingStart;

    },

    polygonEnd: function() {

      d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;

      d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidLineStart;

      d3_geo_pathCentroid.lineEnd = d3_geo_pathCentroidLineEnd;

    }

  };

  function d3_geo_pathCentroidPoint(x, y) {

    d3_geo_centroidX0 += x;

    d3_geo_centroidY0 += y;

    ++d3_geo_centroidZ0;

  }

  function d3_geo_pathCentroidLineStart() {

    var x0, y0;

    d3_geo_pathCentroid.point = function(x, y) {

      d3_geo_pathCentroid.point = nextPoint;

      d3_geo_pathCentroidPoint(x0 = x, y0 = y);

    };

    function nextPoint(x, y) {

      var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);

      d3_geo_centroidX1 += z * (x0 + x) / 2;

      d3_geo_centroidY1 += z * (y0 + y) / 2;

      d3_geo_centroidZ1 += z;

      d3_geo_pathCentroidPoint(x0 = x, y0 = y);

    }

  }

  function d3_geo_pathCentroidLineEnd() {

    d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;

  }

  function d3_geo_pathCentroidRingStart() {

    var x00, y00, x0, y0;

    d3_geo_pathCentroid.point = function(x, y) {

      d3_geo_pathCentroid.point = nextPoint;

      d3_geo_pathCentroidPoint(x00 = x0 = x, y00 = y0 = y);

    };

    function nextPoint(x, y) {

      var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);

      d3_geo_centroidX1 += z * (x0 + x) / 2;

      d3_geo_centroidY1 += z * (y0 + y) / 2;

      d3_geo_centroidZ1 += z;

      z = y0 * x - x0 * y;

      d3_geo_centroidX2 += z * (x0 + x);

      d3_geo_centroidY2 += z * (y0 + y);

      d3_geo_centroidZ2 += z * 3;

      d3_geo_pathCentroidPoint(x0 = x, y0 = y);

    }

    d3_geo_pathCentroid.lineEnd = function() {

      nextPoint(x00, y00);

    };

  }

  function d3_geo_pathContext(context) {

    var pointRadius = 4.5;

    var stream = {

      point: point,

      lineStart: function() {

        stream.point = pointLineStart;

      },

      lineEnd: lineEnd,

      polygonStart: function() {

        stream.lineEnd = lineEndPolygon;

      },

      polygonEnd: function() {

        stream.lineEnd = lineEnd;

        stream.point = point;

      },

      pointRadius: function(_) {

        pointRadius = _;

        return stream;

      },

      result: d3_noop

    };

    function point(x, y) {

      context.moveTo(x, y);

      context.arc(x, y, pointRadius, 0, ?);

    }

    function pointLineStart(x, y) {

      context.moveTo(x, y);

      stream.point = pointLine;

    }

    function pointLine(x, y) {

      context.lineTo(x, y);

    }

    function lineEnd() {

      stream.point = point;

    }

    function lineEndPolygon() {

      context.closePath();

    }

    return stream;

  }

  function d3_geo_resample(project) {

    var ?2 = .5, cosMinDistance = Math.cos(30 * d3_radians), maxDepth = 16;

    function resample(stream) {

      return (maxDepth ? resampleRecursive : resampleNone)(stream);

    }

    function resampleNone(stream) {

      return d3_geo_transformPoint(stream, function(x, y) {

        x = project(x, y);

        stream.point(x[0], x[1]);

      });

    }

    function resampleRecursive(stream) {

      var ?00, ?00, x00, y00, a00, b00, c00, ?0, x0, y0, a0, b0, c0;

      var resample = {

        point: point,

        lineStart: lineStart,

        lineEnd: lineEnd,

        polygonStart: function() {

          stream.polygonStart();

          resample.lineStart = ringStart;

        },

        polygonEnd: function() {

          stream.polygonEnd();

          resample.lineStart = lineStart;

        }

      };

      function point(x, y) {

        x = project(x, y);

        stream.point(x[0], x[1]);

      }

      function lineStart() {

        x0 = NaN;

        resample.point = linePoint;

        stream.lineStart();

      }

      function linePoint(?, ?) {

        var c = d3_geo_cartesian([ ?, ? ]), p = project(?, ?);

        resampleLineTo(x0, y0, ?0, a0, b0, c0, x0 = p[0], y0 = p[1], ?0 = ?, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);

        stream.point(x0, y0);

      }

      function lineEnd() {

        resample.point = point;

        stream.lineEnd();

      }

      function ringStart() {

        lineStart();

        resample.point = ringPoint;

        resample.lineEnd = ringEnd;

      }

      function ringPoint(?, ?) {

        linePoint(?00 = ?, ?00 = ?), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;

        resample.point = linePoint;

      }

      function ringEnd() {

        resampleLineTo(x0, y0, ?0, a0, b0, c0, x00, y00, ?00, a00, b00, c00, maxDepth, stream);

        resample.lineEnd = lineEnd;

        lineEnd();

      }

      return resample;

    }

    function resampleLineTo(x0, y0, ?0, a0, b0, c0, x1, y1, ?1, a1, b1, c1, depth, stream) {

      var dx = x1 - x0, dy = y1 - y0, d2 = dx * dx + dy * dy;

      if (d2 > 4 * ?2 && depth--) {

        var a = a0 + a1, b = b0 + b1, c = c0 + c1, m = Math.sqrt(a * a + b * b + c * c), ?2 = Math.asin(c /= m), ?2 = abs(abs(c) - 1) < ? || abs(?0 - ?1) < ? ? (?0 + ?1) / 2 : Math.atan2(b, a), p = project(?2, ?2), x2 = p[0], y2 = p[1], dx2 = x2 - x0, dy2 = y2 - y0, dz = dy * dx2 - dx * dy2;

        if (dz * dz / d2 > ?2 || abs((dx * dx2 + dy * dy2) / d2 - .5) > .3 || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {

          resampleLineTo(x0, y0, ?0, a0, b0, c0, x2, y2, ?2, a /= m, b /= m, c, depth, stream);

          stream.point(x2, y2);

          resampleLineTo(x2, y2, ?2, a, b, c, x1, y1, ?1, a1, b1, c1, depth, stream);

        }

      }

    }

    resample.precision = function(_) {

      if (!arguments.length) return Math.sqrt(?2);

      maxDepth = (?2 = _ * _) > 0 && 16;

      return resample;

    };

    return resample;

  }

  d3.geo.path = function() {

    var pointRadius = 4.5, projection, context, projectStream, contextStream, cacheStream;

    function path(object) {

      if (object) {

        if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));

        if (!cacheStream || !cacheStream.valid) cacheStream = projectStream(contextStream);

        d3.geo.stream(object, cacheStream);

      }

      return contextStream.result();

    }

    path.area = function(object) {

      d3_geo_pathAreaSum = 0;

      d3.geo.stream(object, projectStream(d3_geo_pathArea));

      return d3_geo_pathAreaSum;

    };

    path.centroid = function(object) {

      d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;

      d3.geo.stream(object, projectStream(d3_geo_pathCentroid));

      return d3_geo_centroidZ2 ? [ d3_geo_centroidX2 / d3_geo_centroidZ2, d3_geo_centroidY2 / d3_geo_centroidZ2 ] : d3_geo_centroidZ1 ? [ d3_geo_centroidX1 / d3_geo_centroidZ1, d3_geo_centroidY1 / d3_geo_centroidZ1 ] : d3_geo_centroidZ0 ? [ d3_geo_centroidX0 / d3_geo_centroidZ0, d3_geo_centroidY0 / d3_geo_centroidZ0 ] : [ NaN, NaN ];

    };

    path.bounds = function(object) {

      d3_geo_pathBoundsX1 = d3_geo_pathBoundsY1 = -(d3_geo_pathBoundsX0 = d3_geo_pathBoundsY0 = Infinity);

      d3.geo.stream(object, projectStream(d3_geo_pathBounds));

      return [ [ d3_geo_pathBoundsX0, d3_geo_pathBoundsY0 ], [ d3_geo_pathBoundsX1, d3_geo_pathBoundsY1 ] ];

    };

    path.projection = function(_) {

      if (!arguments.length) return projection;

      projectStream = (projection = _) ? _.stream || d3_geo_pathProjectStream(_) : d3_identity;

      return reset();

    };

    path.context = function(_) {

      if (!arguments.length) return context;

      contextStream = (context = _) == null ? new d3_geo_pathBuffer() : new d3_geo_pathContext(_);

      if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);

      return reset();

    };

    path.pointRadius = function(_) {

      if (!arguments.length) return pointRadius;

      pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);

      return path;

    };

    function reset() {

      cacheStream = null;

      return path;

    }

    return path.projection(d3.geo.albersUsa()).context(null);

  };

  function d3_geo_pathProjectStream(project) {

    var resample = d3_geo_resample(function(x, y) {

      return project([ x * d3_degrees, y * d3_degrees ]);

    });

    return function(stream) {

      return d3_geo_projectionRadians(resample(stream));

    };

  }

  d3.geo.transform = function(methods) {

    return {

      stream: function(stream) {

        var transform = new d3_geo_transform(stream);

        for (var k in methods) transform[k] = methods[k];

        return transform;

      }

    };

  };

  function d3_geo_transform(stream) {

    this.stream = stream;

  }

  d3_geo_transform.prototype = {

    point: function(x, y) {

      this.stream.point(x, y);

    },

    sphere: function() {

      this.stream.sphere();

    },

    lineStart: function() {

      this.stream.lineStart();

    },

    lineEnd: function() {

      this.stream.lineEnd();

    },

    polygonStart: function() {

      this.stream.polygonStart();

    },

    polygonEnd: function() {

      this.stream.polygonEnd();

    }

  };

  function d3_geo_transformPoint(stream, point) {

    return {

      point: point,

      sphere: function() {

        stream.sphere();

      },

      lineStart: function() {

        stream.lineStart();

      },

      lineEnd: function() {

        stream.lineEnd();

      },

      polygonStart: function() {

        stream.polygonStart();

      },

      polygonEnd: function() {

        stream.polygonEnd();

      }

    };

  }

  d3.geo.projection = d3_geo_projection;

  d3.geo.projectionMutator = d3_geo_projectionMutator;

  function d3_geo_projection(project) {

    return d3_geo_projectionMutator(function() {

      return project;

    })();

  }

  function d3_geo_projectionMutator(projectAt) {

    var project, rotate, projectRotate, projectResample = d3_geo_resample(function(x, y) {

      x = project(x, y);

      return [ x[0] * k + ?x, ?y - x[1] * k ];

    }), k = 150, x = 480, y = 250, ? = 0, ? = 0, ?? = 0, ?? = 0, ?? = 0, ?x, ?y, preclip = d3_geo_clipAntimeridian, postclip = d3_identity, clipAngle = null, clipExtent = null, stream;

    function projection(point) {

      point = projectRotate(point[0] * d3_radians, point[1] * d3_radians);

      return [ point[0] * k + ?x, ?y - point[1] * k ];

    }

    function invert(point) {

      point = projectRotate.invert((point[0] - ?x) / k, (?y - point[1]) / k);

      return point && [ point[0] * d3_degrees, point[1] * d3_degrees ];

    }

    projection.stream = function(output) {

      if (stream) stream.valid = false;

      stream = d3_geo_projectionRadians(preclip(rotate, projectResample(postclip(output))));

      stream.valid = true;

      return stream;

    };

    projection.clipAngle = function(_) {

      if (!arguments.length) return clipAngle;

      preclip = _ == null ? (clipAngle = _, d3_geo_clipAntimeridian) : d3_geo_clipCircle((clipAngle = +_) * d3_radians);

      return invalidate();

    };

    projection.clipExtent = function(_) {

      if (!arguments.length) return clipExtent;

      clipExtent = _;

      postclip = _ ? d3_geo_clipExtent(_[0][0], _[0][1], _[1][0], _[1][1]) : d3_identity;

      return invalidate();

    };

    projection.scale = function(_) {

      if (!arguments.length) return k;

      k = +_;

      return reset();

    };

    projection.translate = function(_) {

      if (!arguments.length) return [ x, y ];

      x = +_[0];

      y = +_[1];

      return reset();

    };

    projection.center = function(_) {

      if (!arguments.length) return [ ? * d3_degrees, ? * d3_degrees ];

      ? = _[0] % 360 * d3_radians;

      ? = _[1] % 360 * d3_radians;

      return reset();

    };

    projection.rotate = function(_) {

      if (!arguments.length) return [ ?? * d3_degrees, ?? * d3_degrees, ?? * d3_degrees ];

      ?? = _[0] % 360 * d3_radians;

      ?? = _[1] % 360 * d3_radians;

      ?? = _.length > 2 ? _[2] % 360 * d3_radians : 0;

      return reset();

    };

    d3.rebind(projection, projectResample, "precision");

    function reset() {

      projectRotate = d3_geo_compose(rotate = d3_geo_rotation(??, ??, ??), project);

      var center = project(?, ?);

      ?x = x - center[0] * k;

      ?y = y + center[1] * k;

      return invalidate();

    }

    function invalidate() {

      if (stream) stream.valid = false, stream = null;

      return projection;

    }

    return function() {

      project = projectAt.apply(this, arguments);

      projection.invert = project.invert && invert;

      return reset();

    };

  }

  function d3_geo_projectionRadians(stream) {

    return d3_geo_transformPoint(stream, function(x, y) {

      stream.point(x * d3_radians, y * d3_radians);

    });

  }

  function d3_geo_equirectangular(?, ?) {

    return [ ?, ? ];

  }

  (d3.geo.equirectangular = function() {

    return d3_geo_projection(d3_geo_equirectangular);

  }).raw = d3_geo_equirectangular.invert = d3_geo_equirectangular;

  d3.geo.rotation = function(rotate) {

    rotate = d3_geo_rotation(rotate[0] % 360 * d3_radians, rotate[1] * d3_radians, rotate.length > 2 ? rotate[2] * d3_radians : 0);

    function forward(coordinates) {

      coordinates = rotate(coordinates[0] * d3_radians, coordinates[1] * d3_radians);

      return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;

    }

    forward.invert = function(coordinates) {

      coordinates = rotate.invert(coordinates[0] * d3_radians, coordinates[1] * d3_radians);

      return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;

    };

    return forward;

  };

  function d3_geo_identityRotation(?, ?) {

    return [ ? > ? ? ? - ? : ? < -? ? ? + ? : ?, ? ];

  }

  d3_geo_identityRotation.invert = d3_geo_equirectangular;

  function d3_geo_rotation(??, ??, ??) {

    return ?? ? ?? || ?? ? d3_geo_compose(d3_geo_rotation?(??), d3_geo_rotation??(??, ??)) : d3_geo_rotation?(??) : ?? || ?? ? d3_geo_rotation??(??, ??) : d3_geo_identityRotation;

  }

  function d3_geo_forwardRotation?(??) {

    return function(?, ?) {

      return ? += ??, [ ? > ? ? ? - ? : ? < -? ? ? + ? : ?, ? ];

    };

  }

  function d3_geo_rotation?(??) {

    var rotation = d3_geo_forwardRotation?(??);

    rotation.invert = d3_geo_forwardRotation?(-??);

    return rotation;

  }

  function d3_geo_rotation??(??, ??) {

    var cos?? = Math.cos(??), sin?? = Math.sin(??), cos?? = Math.cos(??), sin?? = Math.sin(??);

    function rotation(?, ?) {

      var cos? = Math.cos(?), x = Math.cos(?) * cos?, y = Math.sin(?) * cos?, z = Math.sin(?), k = z * cos?? + x * sin??;

      return [ Math.atan2(y * cos?? - k * sin??, x * cos?? - z * sin??), d3_asin(k * cos?? + y * sin??) ];

    }

    rotation.invert = function(?, ?) {

      var cos? = Math.cos(?), x = Math.cos(?) * cos?, y = Math.sin(?) * cos?, z = Math.sin(?), k = z * cos?? - y * sin??;

      return [ Math.atan2(y * cos?? + z * sin??, x * cos?? + k * sin??), d3_asin(k * cos?? - x * sin??) ];

    };

    return rotation;

  }

  d3.geo.circle = function() {

    var origin = [ 0, 0 ], angle, precision = 6, interpolate;

    function circle() {

      var center = typeof origin === "function" ? origin.apply(this, arguments) : origin, rotate = d3_geo_rotation(-center[0] * d3_radians, -center[1] * d3_radians, 0).invert, ring = [];

      interpolate(null, null, 1, {

        point: function(x, y) {

          ring.push(x = rotate(x, y));

          x[0] *= d3_degrees, x[1] *= d3_degrees;

        }

      });

      return {

        type: "Polygon",

        coordinates: [ ring ]

      };

    }

    circle.origin = function(x) {

      if (!arguments.length) return origin;

      origin = x;

      return circle;

    };

    circle.angle = function(x) {

      if (!arguments.length) return angle;

      interpolate = d3_geo_circleInterpolate((angle = +x) * d3_radians, precision * d3_radians);

      return circle;

    };

    circle.precision = function(_) {

      if (!arguments.length) return precision;

      interpolate = d3_geo_circleInterpolate(angle * d3_radians, (precision = +_) * d3_radians);

      return circle;

    };

    return circle.angle(90);

  };

  function d3_geo_circleInterpolate(radius, precision) {

    var cr = Math.cos(radius), sr = Math.sin(radius);

    return function(from, to, direction, listener) {

      var step = direction * precision;

      if (from != null) {

        from = d3_geo_circleAngle(cr, from);

        to = d3_geo_circleAngle(cr, to);

        if (direction > 0 ? from < to : from > to) from += direction * ?;

      } else {

        from = radius + direction * ?;

        to = radius - .5 * step;

      }

      for (var point, t = from; direction > 0 ? t > to : t < to; t -= step) {

        listener.point((point = d3_geo_spherical([ cr, -sr * Math.cos(t), -sr * Math.sin(t) ]))[0], point[1]);

      }

    };

  }

  function d3_geo_circleAngle(cr, point) {

    var a = d3_geo_cartesian(point);

    a[0] -= cr;

    d3_geo_cartesianNormalize(a);

    var angle = d3_acos(-a[1]);

    return ((-a[2] < 0 ? -angle : angle) + 2 * Math.PI - ?) % (2 * Math.PI);

  }

  d3.geo.distance = function(a, b) {

    var ?? = (b[0] - a[0]) * d3_radians, ?0 = a[1] * d3_radians, ?1 = b[1] * d3_radians, sin?? = Math.sin(??), cos?? = Math.cos(??), sin?0 = Math.sin(?0), cos?0 = Math.cos(?0), sin?1 = Math.sin(?1), cos?1 = Math.cos(?1), t;

    return Math.atan2(Math.sqrt((t = cos?1 * sin??) * t + (t = cos?0 * sin?1 - sin?0 * cos?1 * cos??) * t), sin?0 * sin?1 + cos?0 * cos?1 * cos??);

  };

  d3.geo.graticule = function() {

    var x1, x0, X1, X0, y1, y0, Y1, Y0, dx = 10, dy = dx, DX = 90, DY = 360, x, y, X, Y, precision = 2.5;

    function graticule() {

      return {

        type: "MultiLineString",

        coordinates: lines()

      };

    }

    function lines() {

      return d3.range(Math.ceil(X0 / DX) * DX, X1, DX).map(X).concat(d3.range(Math.ceil(Y0 / DY) * DY, Y1, DY).map(Y)).concat(d3.range(Math.ceil(x0 / dx) * dx, x1, dx).filter(function(x) {

        return abs(x % DX) > ?;

      }).map(x)).concat(d3.range(Math.ceil(y0 / dy) * dy, y1, dy).filter(function(y) {

        return abs(y % DY) > ?;

      }).map(y));

    }

    graticule.lines = function() {

      return lines().map(function(coordinates) {

        return {

          type: "LineString",

          coordinates: coordinates

        };

      });

    };

    graticule.outline = function() {

      return {

        type: "Polygon",

        coordinates: [ X(X0).concat(Y(Y1).slice(1), X(X1).reverse().slice(1), Y(Y0).reverse().slice(1)) ]

      };

    };

    graticule.extent = function(_) {

      if (!arguments.length) return graticule.minorExtent();

      return graticule.majorExtent(_).minorExtent(_);

    };

    graticule.majorExtent = function(_) {

      if (!arguments.length) return [ [ X0, Y0 ], [ X1, Y1 ] ];

      X0 = +_[0][0], X1 = +_[1][0];

      Y0 = +_[0][1], Y1 = +_[1][1];

      if (X0 > X1) _ = X0, X0 = X1, X1 = _;

      if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;

      return graticule.precision(precision);

    };

    graticule.minorExtent = function(_) {

      if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];

      x0 = +_[0][0], x1 = +_[1][0];

      y0 = +_[0][1], y1 = +_[1][1];

      if (x0 > x1) _ = x0, x0 = x1, x1 = _;

      if (y0 > y1) _ = y0, y0 = y1, y1 = _;

      return graticule.precision(precision);

    };

    graticule.step = function(_) {

      if (!arguments.length) return graticule.minorStep();

      return graticule.majorStep(_).minorStep(_);

    };

    graticule.majorStep = function(_) {

      if (!arguments.length) return [ DX, DY ];

      DX = +_[0], DY = +_[1];

      return graticule;

    };

    graticule.minorStep = function(_) {

      if (!arguments.length) return [ dx, dy ];

      dx = +_[0], dy = +_[1];

      return graticule;

    };

    graticule.precision = function(_) {

      if (!arguments.length) return precision;

      precision = +_;

      x = d3_geo_graticuleX(y0, y1, 90);

      y = d3_geo_graticuleY(x0, x1, precision);

      X = d3_geo_graticuleX(Y0, Y1, 90);

      Y = d3_geo_graticuleY(X0, X1, precision);

      return graticule;

    };

    return graticule.majorExtent([ [ -180, -90 + ? ], [ 180, 90 - ? ] ]).minorExtent([ [ -180, -80 - ? ], [ 180, 80 + ? ] ]);

  };

  function d3_geo_graticuleX(y0, y1, dy) {

    var y = d3.range(y0, y1 - ?, dy).concat(y1);

    return function(x) {

      return y.map(function(y) {

        return [ x, y ];

      });

    };

  }

  function d3_geo_graticuleY(x0, x1, dx) {

    var x = d3.range(x0, x1 - ?, dx).concat(x1);

    return function(y) {

      return x.map(function(x) {

        return [ x, y ];

      });

    };

  }

  function d3_source(d) {

    return d.source;

  }

  function d3_target(d) {

    return d.target;

  }

  d3.geo.greatArc = function() {

    var source = d3_source, source_, target = d3_target, target_;

    function greatArc() {

      return {

        type: "LineString",

        coordinates: [ source_ || source.apply(this, arguments), target_ || target.apply(this, arguments) ]

      };

    }

    greatArc.distance = function() {

      return d3.geo.distance(source_ || source.apply(this, arguments), target_ || target.apply(this, arguments));

    };

    greatArc.source = function(_) {

      if (!arguments.length) return source;

      source = _, source_ = typeof _ === "function" ? null : _;

      return greatArc;

    };

    greatArc.target = function(_) {

      if (!arguments.length) return target;

      target = _, target_ = typeof _ === "function" ? null : _;

      return greatArc;

    };

    greatArc.precision = function() {

      return arguments.length ? greatArc : 0;

    };

    return greatArc;

  };

  d3.geo.interpolate = function(source, target) {

    return d3_geo_interpolate(source[0] * d3_radians, source[1] * d3_radians, target[0] * d3_radians, target[1] * d3_radians);

  };

  function d3_geo_interpolate(x0, y0, x1, y1) {

    var cy0 = Math.cos(y0), sy0 = Math.sin(y0), cy1 = Math.cos(y1), sy1 = Math.sin(y1), kx0 = cy0 * Math.cos(x0), ky0 = cy0 * Math.sin(x0), kx1 = cy1 * Math.cos(x1), ky1 = cy1 * Math.sin(x1), d = 2 * Math.asin(Math.sqrt(d3_haversin(y1 - y0) + cy0 * cy1 * d3_haversin(x1 - x0))), k = 1 / Math.sin(d);

    var interpolate = d ? function(t) {

      var B = Math.sin(t *= d) * k, A = Math.sin(d - t) * k, x = A * kx0 + B * kx1, y = A * ky0 + B * ky1, z = A * sy0 + B * sy1;

      return [ Math.atan2(y, x) * d3_degrees, Math.atan2(z, Math.sqrt(x * x + y * y)) * d3_degrees ];

    } : function() {

      return [ x0 * d3_degrees, y0 * d3_degrees ];

    };

    interpolate.distance = d;

    return interpolate;

  }

  d3.geo.length = function(object) {

    d3_geo_lengthSum = 0;

    d3.geo.stream(object, d3_geo_length);

    return d3_geo_lengthSum;

  };

  var d3_geo_lengthSum;

  var d3_geo_length = {

    sphere: d3_noop,

    point: d3_noop,

    lineStart: d3_geo_lengthLineStart,

    lineEnd: d3_noop,

    polygonStart: d3_noop,

    polygonEnd: d3_noop

  };

  function d3_geo_lengthLineStart() {

    var ?0, sin?0, cos?0;

    d3_geo_length.point = function(?, ?) {

      ?0 = ? * d3_radians, sin?0 = Math.sin(? *= d3_radians), cos?0 = Math.cos(?);

      d3_geo_length.point = nextPoint;

    };

    d3_geo_length.lineEnd = function() {

      d3_geo_length.point = d3_geo_length.lineEnd = d3_noop;

    };

    function nextPoint(?, ?) {

      var sin? = Math.sin(? *= d3_radians), cos? = Math.cos(?), t = abs((? *= d3_radians) - ?0), cos?? = Math.cos(t);

      d3_geo_lengthSum += Math.atan2(Math.sqrt((t = cos? * Math.sin(t)) * t + (t = cos?0 * sin? - sin?0 * cos? * cos??) * t), sin?0 * sin? + cos?0 * cos? * cos??);

      ?0 = ?, sin?0 = sin?, cos?0 = cos?;

    }

  }

  function d3_geo_azimuthal(scale, angle) {

    function azimuthal(?, ?) {

      var cos? = Math.cos(?), cos? = Math.cos(?), k = scale(cos? * cos?);

      return [ k * cos? * Math.sin(?), k * Math.sin(?) ];

    }

    azimuthal.invert = function(x, y) {

      var ? = Math.sqrt(x * x + y * y), c = angle(?), sinc = Math.sin(c), cosc = Math.cos(c);

      return [ Math.atan2(x * sinc, ? * cosc), Math.asin(? && y * sinc / ?) ];

    };

    return azimuthal;

  }

  var d3_geo_azimuthalEqualArea = d3_geo_azimuthal(function(cos?cos?) {

    return Math.sqrt(2 / (1 + cos?cos?));

  }, function(?) {

    return 2 * Math.asin(? / 2);

  });

  (d3.geo.azimuthalEqualArea = function() {

    return d3_geo_projection(d3_geo_azimuthalEqualArea);

  }).raw = d3_geo_azimuthalEqualArea;

  var d3_geo_azimuthalEquidistant = d3_geo_azimuthal(function(cos?cos?) {

    var c = Math.acos(cos?cos?);

    return c && c / Math.sin(c);

  }, d3_identity);

  (d3.geo.azimuthalEquidistant = function() {

    return d3_geo_projection(d3_geo_azimuthalEquidistant);

  }).raw = d3_geo_azimuthalEquidistant;

  function d3_geo_conicConformal(?0, ?1) {

    var cos?0 = Math.cos(?0), t = function(?) {

      return Math.tan(? / 4 + ? / 2);

    }, n = ?0 === ?1 ? Math.sin(?0) : Math.log(cos?0 / Math.cos(?1)) / Math.log(t(?1) / t(?0)), F = cos?0 * Math.pow(t(?0), n) / n;

    if (!n) return d3_geo_mercator;

    function forward(?, ?) {

      if (F > 0) {

        if (? < -half? + ?) ? = -half? + ?;

      } else {

        if (? > half? - ?) ? = half? - ?;

      }

      var ? = F / Math.pow(t(?), n);

      return [ ? * Math.sin(n * ?), F - ? * Math.cos(n * ?) ];

    }

    forward.invert = function(x, y) {

      var ?0_y = F - y, ? = d3_sgn(n) * Math.sqrt(x * x + ?0_y * ?0_y);

      return [ Math.atan2(x, ?0_y) / n, 2 * Math.atan(Math.pow(F / ?, 1 / n)) - half? ];

    };

    return forward;

  }

  (d3.geo.conicConformal = function() {

    return d3_geo_conic(d3_geo_conicConformal);

  }).raw = d3_geo_conicConformal;

  function d3_geo_conicEquidistant(?0, ?1) {

    var cos?0 = Math.cos(?0), n = ?0 === ?1 ? Math.sin(?0) : (cos?0 - Math.cos(?1)) / (?1 - ?0), G = cos?0 / n + ?0;

    if (abs(n) < ?) return d3_geo_equirectangular;

    function forward(?, ?) {

      var ? = G - ?;

      return [ ? * Math.sin(n * ?), G - ? * Math.cos(n * ?) ];

    }

    forward.invert = function(x, y) {

      var ?0_y = G - y;

      return [ Math.atan2(x, ?0_y) / n, G - d3_sgn(n) * Math.sqrt(x * x + ?0_y * ?0_y) ];

    };

    return forward;

  }

  (d3.geo.conicEquidistant = function() {

    return d3_geo_conic(d3_geo_conicEquidistant);

  }).raw = d3_geo_conicEquidistant;

  var d3_geo_gnomonic = d3_geo_azimuthal(function(cos?cos?) {

    return 1 / cos?cos?;

  }, Math.atan);

  (d3.geo.gnomonic = function() {

    return d3_geo_projection(d3_geo_gnomonic);

  }).raw = d3_geo_gnomonic;

  function d3_geo_mercator(?, ?) {

    return [ ?, Math.log(Math.tan(? / 4 + ? / 2)) ];

  }

  d3_geo_mercator.invert = function(x, y) {

    return [ x, 2 * Math.atan(Math.exp(y)) - half? ];

  };

  function d3_geo_mercatorProjection(project) {

    var m = d3_geo_projection(project), scale = m.scale, translate = m.translate, clipExtent = m.clipExtent, clipAuto;

    m.scale = function() {

      var v = scale.apply(m, arguments);

      return v === m ? clipAuto ? m.clipExtent(null) : m : v;

    };

    m.translate = function() {

      var v = translate.apply(m, arguments);

      return v === m ? clipAuto ? m.clipExtent(null) : m : v;

    };

    m.clipExtent = function(_) {

      var v = clipExtent.apply(m, arguments);

      if (v === m) {

        if (clipAuto = _ == null) {

          var k = ? * scale(), t = translate();

          clipExtent([ [ t[0] - k, t[1] - k ], [ t[0] + k, t[1] + k ] ]);

        }

      } else if (clipAuto) {

        v = null;

      }

      return v;

    };

    return m.clipExtent(null);

  }

  (d3.geo.mercator = function() {

    return d3_geo_mercatorProjection(d3_geo_mercator);

  }).raw = d3_geo_mercator;

  var d3_geo_orthographic = d3_geo_azimuthal(function() {

    return 1;

  }, Math.asin);

  (d3.geo.orthographic = function() {

    return d3_geo_projection(d3_geo_orthographic);

  }).raw = d3_geo_orthographic;

  var d3_geo_stereographic = d3_geo_azimuthal(function(cos?cos?) {

    return 1 / (1 + cos?cos?);

  }, function(?) {

    return 2 * Math.atan(?);

  });

  (d3.geo.stereographic = function() {

    return d3_geo_projection(d3_geo_stereographic);

  }).raw = d3_geo_stereographic;

  function d3_geo_transverseMercator(?, ?) {

    return [ Math.log(Math.tan(? / 4 + ? / 2)), -? ];

  }

  d3_geo_transverseMercator.invert = function(x, y) {

    return [ -y, 2 * Math.atan(Math.exp(x)) - half? ];

  };

  (d3.geo.transverseMercator = function() {

    var projection = d3_geo_mercatorProjection(d3_geo_transverseMercator), center = projection.center, rotate = projection.rotate;

    projection.center = function(_) {

      return _ ? center([ -_[1], _[0] ]) : (_ = center(), [ -_[1], _[0] ]);

    };

    projection.rotate = function(_) {

      return _ ? rotate([ _[0], _[1], _.length > 2 ? _[2] + 90 : 90 ]) : (_ = rotate(),

      [ _[0], _[1], _[2] - 90 ]);

    };

    return projection.rotate([ 0, 0 ]);

  }).raw = d3_geo_transverseMercator;

  d3.geom = {};

  function d3_geom_pointX(d) {

    return d[0];

  }

  function d3_geom_pointY(d) {

    return d[1];

  }

  d3.geom.hull = function(vertices) {

    var x = d3_geom_pointX, y = d3_geom_pointY;

    if (arguments.length) return hull(vertices);

    function hull(data) {

      if (data.length < 3) return [];

      var fx = d3_functor(x), fy = d3_functor(y), i, n = data.length, points = [], flippedPoints = [];

      for (i = 0; i < n; i++) {

        points.push([ +fx.call(this, data[i], i), +fy.call(this, data[i], i), i ]);

      }

      points.sort(d3_geom_hullOrder);

      for (i = 0; i < n; i++) flippedPoints.push([ points[i][0], -points[i][1] ]);

      var upper = d3_geom_hullUpper(points), lower = d3_geom_hullUpper(flippedPoints);

      var skipLeft = lower[0] === upper[0], skipRight = lower[lower.length - 1] === upper[upper.length - 1], polygon = [];

      for (i = upper.length - 1; i >= 0; --i) polygon.push(data[points[upper[i]][2]]);

      for (i = +skipLeft; i < lower.length - skipRight; ++i) polygon.push(data[points[lower[i]][2]]);

      return polygon;

    }

    hull.x = function(_) {

      return arguments.length ? (x = _, hull) : x;

    };

    hull.y = function(_) {

      return arguments.length ? (y = _, hull) : y;

    };

    return hull;

  };

  function d3_geom_hullUpper(points) {

    var n = points.length, hull = [ 0, 1 ], hs = 2;

    for (var i = 2; i < n; i++) {

      while (hs > 1 && d3_cross2d(points[hull[hs - 2]], points[hull[hs - 1]], points[i]) <= 0) --hs;

      hull[hs++] = i;

    }

    return hull.slice(0, hs);

  }

  function d3_geom_hullOrder(a, b) {

    return a[0] - b[0] || a[1] - b[1];

  }

  d3.geom.polygon = function(coordinates) {

    d3_subclass(coordinates, d3_geom_polygonPrototype);

    return coordinates;

  };

  var d3_geom_polygonPrototype = d3.geom.polygon.prototype = [];

  d3_geom_polygonPrototype.area = function() {

    var i = -1, n = this.length, a, b = this[n - 1], area = 0;

    while (++i < n) {

      a = b;

      b = this[i];

      area += a[1] * b[0] - a[0] * b[1];

    }

    return area * .5;

  };

  d3_geom_polygonPrototype.centroid = function(k) {

    var i = -1, n = this.length, x = 0, y = 0, a, b = this[n - 1], c;

    if (!arguments.length) k = -1 / (6 * this.area());

    while (++i < n) {

      a = b;

      b = this[i];

      c = a[0] * b[1] - b[0] * a[1];

      x += (a[0] + b[0]) * c;

      y += (a[1] + b[1]) * c;

    }

    return [ x * k, y * k ];

  };

  d3_geom_polygonPrototype.clip = function(subject) {

    var input, closed = d3_geom_polygonClosed(subject), i = -1, n = this.length - d3_geom_polygonClosed(this), j, m, a = this[n - 1], b, c, d;

    while (++i < n) {

      input = subject.slice();

      subject.length = 0;

      b = this[i];

      c = input[(m = input.length - closed) - 1];

      j = -1;

      while (++j < m) {

        d = input[j];

        if (d3_geom_polygonInside(d, a, b)) {

          if (!d3_geom_polygonInside(c, a, b)) {

            subject.push(d3_geom_polygonIntersect(c, d, a, b));

          }

          subject.push(d);

        } else if (d3_geom_polygonInside(c, a, b)) {

          subject.push(d3_geom_polygonIntersect(c, d, a, b));

        }

        c = d;

      }

      if (closed) subject.push(subject[0]);

      a = b;

    }

    return subject;

  };

  function d3_geom_polygonInside(p, a, b) {

    return (b[0] - a[0]) * (p[1] - a[1]) < (b[1] - a[1]) * (p[0] - a[0]);

  }

  function d3_geom_polygonIntersect(c, d, a, b) {

    var x1 = c[0], x3 = a[0], x21 = d[0] - x1, x43 = b[0] - x3, y1 = c[1], y3 = a[1], y21 = d[1] - y1, y43 = b[1] - y3, ua = (x43 * (y1 - y3) - y43 * (x1 - x3)) / (y43 * x21 - x43 * y21);

    return [ x1 + ua * x21, y1 + ua * y21 ];

  }

  function d3_geom_polygonClosed(coordinates) {

    var a = coordinates[0], b = coordinates[coordinates.length - 1];

    return !(a[0] - b[0] || a[1] - b[1]);

  }

  var d3_geom_voronoiEdges, d3_geom_voronoiCells, d3_geom_voronoiBeaches, d3_geom_voronoiBeachPool = [], d3_geom_voronoiFirstCircle, d3_geom_voronoiCircles, d3_geom_voronoiCirclePool = [];

  function d3_geom_voronoiBeach() {

    d3_geom_voronoiRedBlackNode(this);

    this.edge = this.site = this.circle = null;

  }

  function d3_geom_voronoiCreateBeach(site) {

    var beach = d3_geom_voronoiBeachPool.pop() || new d3_geom_voronoiBeach();

    beach.site = site;

    return beach;

  }

  function d3_geom_voronoiDetachBeach(beach) {

    d3_geom_voronoiDetachCircle(beach);

    d3_geom_voronoiBeaches.remove(beach);

    d3_geom_voronoiBeachPool.push(beach);

    d3_geom_voronoiRedBlackNode(beach);

  }

  function d3_geom_voronoiRemoveBeach(beach) {

    var circle = beach.circle, x = circle.x, y = circle.cy, vertex = {

      x: x,

      y: y

    }, previous = beach.P, next = beach.N, disappearing = [ beach ];

    d3_geom_voronoiDetachBeach(beach);

    var lArc = previous;

    while (lArc.circle && abs(x - lArc.circle.x) < ? && abs(y - lArc.circle.cy) < ?) {

      previous = lArc.P;

      disappearing.unshift(lArc);

      d3_geom_voronoiDetachBeach(lArc);

      lArc = previous;

    }

    disappearing.unshift(lArc);

    d3_geom_voronoiDetachCircle(lArc);

    var rArc = next;

    while (rArc.circle && abs(x - rArc.circle.x) < ? && abs(y - rArc.circle.cy) < ?) {

      next = rArc.N;

      disappearing.push(rArc);

      d3_geom_voronoiDetachBeach(rArc);

      rArc = next;

    }

    disappearing.push(rArc);

    d3_geom_voronoiDetachCircle(rArc);

    var nArcs = disappearing.length, iArc;

    for (iArc = 1; iArc < nArcs; ++iArc) {

      rArc = disappearing[iArc];

      lArc = disappearing[iArc - 1];

      d3_geom_voronoiSetEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);

    }

    lArc = disappearing[0];

    rArc = disappearing[nArcs - 1];

    rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, rArc.site, null, vertex);

    d3_geom_voronoiAttachCircle(lArc);

    d3_geom_voronoiAttachCircle(rArc);

  }

  function d3_geom_voronoiAddBeach(site) {

    var x = site.x, directrix = site.y, lArc, rArc, dxl, dxr, node = d3_geom_voronoiBeaches._;

    while (node) {

      dxl = d3_geom_voronoiLeftBreakPoint(node, directrix) - x;

      if (dxl > ?) node = node.L; else {

        dxr = x - d3_geom_voronoiRightBreakPoint(node, directrix);

        if (dxr > ?) {

          if (!node.R) {

            lArc = node;

            break;

          }

          node = node.R;

        } else {

          if (dxl > -?) {

            lArc = node.P;

            rArc = node;

          } else if (dxr > -?) {

            lArc = node;

            rArc = node.N;

          } else {

            lArc = rArc = node;

          }

          break;

        }

      }

    }

    var newArc = d3_geom_voronoiCreateBeach(site);

    d3_geom_voronoiBeaches.insert(lArc, newArc);

    if (!lArc && !rArc) return;

    if (lArc === rArc) {

      d3_geom_voronoiDetachCircle(lArc);

      rArc = d3_geom_voronoiCreateBeach(lArc.site);

      d3_geom_voronoiBeaches.insert(newArc, rArc);

      newArc.edge = rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);

      d3_geom_voronoiAttachCircle(lArc);

      d3_geom_voronoiAttachCircle(rArc);

      return;

    }

    if (!rArc) {

      newArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);

      return;

    }

    d3_geom_voronoiDetachCircle(lArc);

    d3_geom_voronoiDetachCircle(rArc);

    var lSite = lArc.site, ax = lSite.x, ay = lSite.y, bx = site.x - ax, by = site.y - ay, rSite = rArc.site, cx = rSite.x - ax, cy = rSite.y - ay, d = 2 * (bx * cy - by * cx), hb = bx * bx + by * by, hc = cx * cx + cy * cy, vertex = {

      x: (cy * hb - by * hc) / d + ax,

      y: (bx * hc - cx * hb) / d + ay

    };

    d3_geom_voronoiSetEdgeEnd(rArc.edge, lSite, rSite, vertex);

    newArc.edge = d3_geom_voronoiCreateEdge(lSite, site, null, vertex);

    rArc.edge = d3_geom_voronoiCreateEdge(site, rSite, null, vertex);

    d3_geom_voronoiAttachCircle(lArc);

    d3_geom_voronoiAttachCircle(rArc);

  }

  function d3_geom_voronoiLeftBreakPoint(arc, directrix) {

    var site = arc.site, rfocx = site.x, rfocy = site.y, pby2 = rfocy - directrix;

    if (!pby2) return rfocx;

    var lArc = arc.P;

    if (!lArc) return -Infinity;

    site = lArc.site;

    var lfocx = site.x, lfocy = site.y, plby2 = lfocy - directrix;

    if (!plby2) return lfocx;

    var hl = lfocx - rfocx, aby2 = 1 / pby2 - 1 / plby2, b = hl / plby2;

    if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;

    return (rfocx + lfocx) / 2;

  }

  function d3_geom_voronoiRightBreakPoint(arc, directrix) {

    var rArc = arc.N;

    if (rArc) return d3_geom_voronoiLeftBreakPoint(rArc, directrix);

    var site = arc.site;

    return site.y === directrix ? site.x : Infinity;

  }

  function d3_geom_voronoiCell(site) {

    this.site = site;

    this.edges = [];

  }

  d3_geom_voronoiCell.prototype.prepare = function() {

    var halfEdges = this.edges, iHalfEdge = halfEdges.length, edge;

    while (iHalfEdge--) {

      edge = halfEdges[iHalfEdge].edge;

      if (!edge.b || !edge.a) halfEdges.splice(iHalfEdge, 1);

    }

    halfEdges.sort(d3_geom_voronoiHalfEdgeOrder);

    return halfEdges.length;

  };

  function d3_geom_voronoiCloseCells(extent) {

    var x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], x2, y2, x3, y3, cells = d3_geom_voronoiCells, iCell = cells.length, cell, iHalfEdge, halfEdges, nHalfEdges, start, end;

    while (iCell--) {

      cell = cells[iCell];

      if (!cell || !cell.prepare()) continue;

      halfEdges = cell.edges;

      nHalfEdges = halfEdges.length;

      iHalfEdge = 0;

      while (iHalfEdge < nHalfEdges) {

        end = halfEdges[iHalfEdge].end(), x3 = end.x, y3 = end.y;

        start = halfEdges[++iHalfEdge % nHalfEdges].start(), x2 = start.x, y2 = start.y;

        if (abs(x3 - x2) > ? || abs(y3 - y2) > ?) {

          halfEdges.splice(iHalfEdge, 0, new d3_geom_voronoiHalfEdge(d3_geom_voronoiCreateBorderEdge(cell.site, end, abs(x3 - x0) < ? && y1 - y3 > ? ? {

            x: x0,

            y: abs(x2 - x0) < ? ? y2 : y1

          } : abs(y3 - y1) < ? && x1 - x3 > ? ? {

            x: abs(y2 - y1) < ? ? x2 : x1,

            y: y1

          } : abs(x3 - x1) < ? && y3 - y0 > ? ? {

            x: x1,

            y: abs(x2 - x1) < ? ? y2 : y0

          } : abs(y3 - y0) < ? && x3 - x0 > ? ? {

            x: abs(y2 - y0) < ? ? x2 : x0,

            y: y0

          } : null), cell.site, null));

          ++nHalfEdges;

        }

      }

    }

  }

  function d3_geom_voronoiHalfEdgeOrder(a, b) {

    return b.angle - a.angle;

  }

  function d3_geom_voronoiCircle() {

    d3_geom_voronoiRedBlackNode(this);

    this.x = this.y = this.arc = this.site = this.cy = null;

  }

  function d3_geom_voronoiAttachCircle(arc) {

    var lArc = arc.P, rArc = arc.N;

    if (!lArc || !rArc) return;

    var lSite = lArc.site, cSite = arc.site, rSite = rArc.site;

    if (lSite === rSite) return;

    var bx = cSite.x, by = cSite.y, ax = lSite.x - bx, ay = lSite.y - by, cx = rSite.x - bx, cy = rSite.y - by;

    var d = 2 * (ax * cy - ay * cx);

    if (d >= -?2) return;

    var ha = ax * ax + ay * ay, hc = cx * cx + cy * cy, x = (cy * ha - ay * hc) / d, y = (ax * hc - cx * ha) / d, cy = y + by;

    var circle = d3_geom_voronoiCirclePool.pop() || new d3_geom_voronoiCircle();

    circle.arc = arc;

    circle.site = cSite;

    circle.x = x + bx;

    circle.y = cy + Math.sqrt(x * x + y * y);

    circle.cy = cy;

    arc.circle = circle;

    var before = null, node = d3_geom_voronoiCircles._;

    while (node) {

      if (circle.y < node.y || circle.y === node.y && circle.x <= node.x) {

        if (node.L) node = node.L; else {

          before = node.P;

          break;

        }

      } else {

        if (node.R) node = node.R; else {

          before = node;

          break;

        }

      }

    }

    d3_geom_voronoiCircles.insert(before, circle);

    if (!before) d3_geom_voronoiFirstCircle = circle;

  }

  function d3_geom_voronoiDetachCircle(arc) {

    var circle = arc.circle;

    if (circle) {

      if (!circle.P) d3_geom_voronoiFirstCircle = circle.N;

      d3_geom_voronoiCircles.remove(circle);

      d3_geom_voronoiCirclePool.push(circle);

      d3_geom_voronoiRedBlackNode(circle);

      arc.circle = null;

    }

  }

  function d3_geom_voronoiClipEdges(extent) {

    var edges = d3_geom_voronoiEdges, clip = d3_geom_clipLine(extent[0][0], extent[0][1], extent[1][0], extent[1][1]), i = edges.length, e;

    while (i--) {

      e = edges[i];

      if (!d3_geom_voronoiConnectEdge(e, extent) || !clip(e) || abs(e.a.x - e.b.x) < ? && abs(e.a.y - e.b.y) < ?) {

        e.a = e.b = null;

        edges.splice(i, 1);

      }

    }

  }

  function d3_geom_voronoiConnectEdge(edge, extent) {

    var vb = edge.b;

    if (vb) return true;

    var va = edge.a, x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], lSite = edge.l, rSite = edge.r, lx = lSite.x, ly = lSite.y, rx = rSite.x, ry = rSite.y, fx = (lx + rx) / 2, fy = (ly + ry) / 2, fm, fb;

    if (ry === ly) {

      if (fx < x0 || fx >= x1) return;

      if (lx > rx) {

        if (!va) va = {

          x: fx,

          y: y0

        }; else if (va.y >= y1) return;

        vb = {

          x: fx,

          y: y1

        };

      } else {

        if (!va) va = {

          x: fx,

          y: y1

        }; else if (va.y < y0) return;

        vb = {

          x: fx,

          y: y0

        };

      }

    } else {

      fm = (lx - rx) / (ry - ly);

      fb = fy - fm * fx;

      if (fm < -1 || fm > 1) {

        if (lx > rx) {

          if (!va) va = {

            x: (y0 - fb) / fm,

            y: y0

          }; else if (va.y >= y1) return;

          vb = {

            x: (y1 - fb) / fm,

            y: y1

          };

        } else {

          if (!va) va = {

            x: (y1 - fb) / fm,

            y: y1

          }; else if (va.y < y0) return;

          vb = {

            x: (y0 - fb) / fm,

            y: y0

          };

        }

      } else {

        if (ly < ry) {

          if (!va) va = {

            x: x0,

            y: fm * x0 + fb

          }; else if (va.x >= x1) return;

          vb = {

            x: x1,

            y: fm * x1 + fb

          };

        } else {

          if (!va) va = {

            x: x1,

            y: fm * x1 + fb

          }; else if (va.x < x0) return;

          vb = {

            x: x0,

            y: fm * x0 + fb

          };

        }

      }

    }

    edge.a = va;

    edge.b = vb;

    return true;

  }

  function d3_geom_voronoiEdge(lSite, rSite) {

    this.l = lSite;

    this.r = rSite;

    this.a = this.b = null;

  }

  function d3_geom_voronoiCreateEdge(lSite, rSite, va, vb) {

    var edge = new d3_geom_voronoiEdge(lSite, rSite);

    d3_geom_voronoiEdges.push(edge);

    if (va) d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, va);

    if (vb) d3_geom_voronoiSetEdgeEnd(edge, rSite, lSite, vb);

    d3_geom_voronoiCells[lSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, lSite, rSite));

    d3_geom_voronoiCells[rSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, rSite, lSite));

    return edge;

  }

  function d3_geom_voronoiCreateBorderEdge(lSite, va, vb) {

    var edge = new d3_geom_voronoiEdge(lSite, null);

    edge.a = va;

    edge.b = vb;

    d3_geom_voronoiEdges.push(edge);

    return edge;

  }

  function d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, vertex) {

    if (!edge.a && !edge.b) {

      edge.a = vertex;

      edge.l = lSite;

      edge.r = rSite;

    } else if (edge.l === rSite) {

      edge.b = vertex;

    } else {

      edge.a = vertex;

    }

  }

  function d3_geom_voronoiHalfEdge(edge, lSite, rSite) {

    var va = edge.a, vb = edge.b;

    this.edge = edge;

    this.site = lSite;

    this.angle = rSite ? Math.atan2(rSite.y - lSite.y, rSite.x - lSite.x) : edge.l === lSite ? Math.atan2(vb.x - va.x, va.y - vb.y) : Math.atan2(va.x - vb.x, vb.y - va.y);

  }

  d3_geom_voronoiHalfEdge.prototype = {

    start: function() {

      return this.edge.l === this.site ? this.edge.a : this.edge.b;

    },

    end: function() {

      return this.edge.l === this.site ? this.edge.b : this.edge.a;

    }

  };

  function d3_geom_voronoiRedBlackTree() {

    this._ = null;

  }

  function d3_geom_voronoiRedBlackNode(node) {

    node.U = node.C = node.L = node.R = node.P = node.N = null;

  }

  d3_geom_voronoiRedBlackTree.prototype = {

    insert: function(after, node) {

      var parent, grandpa, uncle;

      if (after) {

        node.P = after;

        node.N = after.N;

        if (after.N) after.N.P = node;

        after.N = node;

        if (after.R) {

          after = after.R;

          while (after.L) after = after.L;

          after.L = node;

        } else {

          after.R = node;

        }

        parent = after;

      } else if (this._) {

        after = d3_geom_voronoiRedBlackFirst(this._);

        node.P = null;

        node.N = after;

        after.P = after.L = node;

        parent = after;

      } else {

        node.P = node.N = null;

        this._ = node;

        parent = null;

      }

      node.L = node.R = null;

      node.U = parent;

      node.C = true;

      after = node;

      while (parent && parent.C) {

        grandpa = parent.U;

        if (parent === grandpa.L) {

          uncle = grandpa.R;

          if (uncle && uncle.C) {

            parent.C = uncle.C = false;

            grandpa.C = true;

            after = grandpa;

          } else {

            if (after === parent.R) {

              d3_geom_voronoiRedBlackRotateLeft(this, parent);

              after = parent;

              parent = after.U;

            }

            parent.C = false;

            grandpa.C = true;

            d3_geom_voronoiRedBlackRotateRight(this, grandpa);

          }

        } else {

          uncle = grandpa.L;

          if (uncle && uncle.C) {

            parent.C = uncle.C = false;

            grandpa.C = true;

            after = grandpa;

          } else {

            if (after === parent.L) {

              d3_geom_voronoiRedBlackRotateRight(this, parent);

              after = parent;

              parent = after.U;

            }

            parent.C = false;

            grandpa.C = true;

            d3_geom_voronoiRedBlackRotateLeft(this, grandpa);

          }

        }

        parent = after.U;

      }

      this._.C = false;

    },

    remove: function(node) {

      if (node.N) node.N.P = node.P;

      if (node.P) node.P.N = node.N;

      node.N = node.P = null;

      var parent = node.U, sibling, left = node.L, right = node.R, next, red;

      if (!left) next = right; else if (!right) next = left; else next = d3_geom_voronoiRedBlackFirst(right);

      if (parent) {

        if (parent.L === node) parent.L = next; else parent.R = next;

      } else {

        this._ = next;

      }

      if (left && right) {

        red = next.C;

        next.C = node.C;

        next.L = left;

        left.U = next;

        if (next !== right) {

          parent = next.U;

          next.U = node.U;

          node = next.R;

          parent.L = node;

          next.R = right;

          right.U = next;

        } else {

          next.U = parent;

          parent = next;

          node = next.R;

        }

      } else {

        red = node.C;

        node = next;

      }

      if (node) node.U = parent;

      if (red) return;

      if (node && node.C) {

        node.C = false;

        return;

      }

      do {

        if (node === this._) break;

        if (node === parent.L) {

          sibling = parent.R;

          if (sibling.C) {

            sibling.C = false;

            parent.C = true;

            d3_geom_voronoiRedBlackRotateLeft(this, parent);

            sibling = parent.R;

          }

          if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {

            if (!sibling.R || !sibling.R.C) {

              sibling.L.C = false;

              sibling.C = true;

              d3_geom_voronoiRedBlackRotateRight(this, sibling);

              sibling = parent.R;

            }

            sibling.C = parent.C;

            parent.C = sibling.R.C = false;

            d3_geom_voronoiRedBlackRotateLeft(this, parent);

            node = this._;

            break;

          }

        } else {

          sibling = parent.L;

          if (sibling.C) {

            sibling.C = false;

            parent.C = true;

            d3_geom_voronoiRedBlackRotateRight(this, parent);

            sibling = parent.L;

          }

          if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {

            if (!sibling.L || !sibling.L.C) {

              sibling.R.C = false;

              sibling.C = true;

              d3_geom_voronoiRedBlackRotateLeft(this, sibling);

              sibling = parent.L;

            }

            sibling.C = parent.C;

            parent.C = sibling.L.C = false;

            d3_geom_voronoiRedBlackRotateRight(this, parent);

            node = this._;

            break;

          }

        }

        sibling.C = true;

        node = parent;

        parent = parent.U;

      } while (!node.C);

      if (node) node.C = false;

    }

  };

  function d3_geom_voronoiRedBlackRotateLeft(tree, node) {

    var p = node, q = node.R, parent = p.U;

    if (parent) {

      if (parent.L === p) parent.L = q; else parent.R = q;

    } else {

      tree._ = q;

    }

    q.U = parent;

    p.U = q;

    p.R = q.L;

    if (p.R) p.R.U = p;

    q.L = p;

  }

  function d3_geom_voronoiRedBlackRotateRight(tree, node) {

    var p = node, q = node.L, parent = p.U;

    if (parent) {

      if (parent.L === p) parent.L = q; else parent.R = q;

    } else {

      tree._ = q;

    }

    q.U = parent;

    p.U = q;

    p.L = q.R;

    if (p.L) p.L.U = p;

    q.R = p;

  }

  function d3_geom_voronoiRedBlackFirst(node) {

    while (node.L) node = node.L;

    return node;

  }

  function d3_geom_voronoi(sites, bbox) {

    var site = sites.sort(d3_geom_voronoiVertexOrder).pop(), x0, y0, circle;

    d3_geom_voronoiEdges = [];

    d3_geom_voronoiCells = new Array(sites.length);

    d3_geom_voronoiBeaches = new d3_geom_voronoiRedBlackTree();

    d3_geom_voronoiCircles = new d3_geom_voronoiRedBlackTree();

    while (true) {

      circle = d3_geom_voronoiFirstCircle;

      if (site && (!circle || site.y < circle.y || site.y === circle.y && site.x < circle.x)) {

        if (site.x !== x0 || site.y !== y0) {

          d3_geom_voronoiCells[site.i] = new d3_geom_voronoiCell(site);

          d3_geom_voronoiAddBeach(site);

          x0 = site.x, y0 = site.y;

        }

        site = sites.pop();

      } else if (circle) {

        d3_geom_voronoiRemoveBeach(circle.arc);

      } else {

        break;

      }

    }

    if (bbox) d3_geom_voronoiClipEdges(bbox), d3_geom_voronoiCloseCells(bbox);

    var diagram = {

      cells: d3_geom_voronoiCells,

      edges: d3_geom_voronoiEdges

    };

    d3_geom_voronoiBeaches = d3_geom_voronoiCircles = d3_geom_voronoiEdges = d3_geom_voronoiCells = null;

    return diagram;

  }

  function d3_geom_voronoiVertexOrder(a, b) {

    return b.y - a.y || b.x - a.x;

  }

  d3.geom.voronoi = function(points) {

    var x = d3_geom_pointX, y = d3_geom_pointY, fx = x, fy = y, clipExtent = d3_geom_voronoiClipExtent;

    if (points) return voronoi(points);

    function voronoi(data) {

      var polygons = new Array(data.length), x0 = clipExtent[0][0], y0 = clipExtent[0][1], x1 = clipExtent[1][0], y1 = clipExtent[1][1];

      d3_geom_voronoi(sites(data), clipExtent).cells.forEach(function(cell, i) {

        var edges = cell.edges, site = cell.site, polygon = polygons[i] = edges.length ? edges.map(function(e) {

          var s = e.start();

          return [ s.x, s.y ];

        }) : site.x >= x0 && site.x <= x1 && site.y >= y0 && site.y <= y1 ? [ [ x0, y1 ], [ x1, y1 ], [ x1, y0 ], [ x0, y0 ] ] : [];

        polygon.point = data[i];

      });

      return polygons;

    }

    function sites(data) {

      return data.map(function(d, i) {

        return {

          x: Math.round(fx(d, i) / ?) * ?,

          y: Math.round(fy(d, i) / ?) * ?,

          i: i

        };

      });

    }

    voronoi.links = function(data) {

      return d3_geom_voronoi(sites(data)).edges.filter(function(edge) {

        return edge.l && edge.r;

      }).map(function(edge) {

        return {

          source: data[edge.l.i],

          target: data[edge.r.i]

        };

      });

    };

    voronoi.triangles = function(data) {

      var triangles = [];

      d3_geom_voronoi(sites(data)).cells.forEach(function(cell, i) {

        var site = cell.site, edges = cell.edges.sort(d3_geom_voronoiHalfEdgeOrder), j = -1, m = edges.length, e0, s0, e1 = edges[m - 1].edge, s1 = e1.l === site ? e1.r : e1.l;

        while (++j < m) {

          e0 = e1;

          s0 = s1;

          e1 = edges[j].edge;

          s1 = e1.l === site ? e1.r : e1.l;

          if (i < s0.i && i < s1.i && d3_geom_voronoiTriangleArea(site, s0, s1) < 0) {

            triangles.push([ data[i], data[s0.i], data[s1.i] ]);

          }

        }

      });

      return triangles;

    };

    voronoi.x = function(_) {

      return arguments.length ? (fx = d3_functor(x = _), voronoi) : x;

    };

    voronoi.y = function(_) {

      return arguments.length ? (fy = d3_functor(y = _), voronoi) : y;

    };

    voronoi.clipExtent = function(_) {

      if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent;

      clipExtent = _ == null ? d3_geom_voronoiClipExtent : _;

      return voronoi;

    };

    voronoi.size = function(_) {

      if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent && clipExtent[1];

      return voronoi.clipExtent(_ && [ [ 0, 0 ], _ ]);

    };

    return voronoi;

  };

  var d3_geom_voronoiClipExtent = [ [ -1e6, -1e6 ], [ 1e6, 1e6 ] ];

  function d3_geom_voronoiTriangleArea(a, b, c) {

    return (a.x - c.x) * (b.y - a.y) - (a.x - b.x) * (c.y - a.y);

  }

  d3.geom.delaunay = function(vertices) {

    return d3.geom.voronoi().triangles(vertices);

  };

  d3.geom.quadtree = function(points, x1, y1, x2, y2) {

    var x = d3_geom_pointX, y = d3_geom_pointY, compat;

    if (compat = arguments.length) {

      x = d3_geom_quadtreeCompatX;

      y = d3_geom_quadtreeCompatY;

      if (compat === 3) {

        y2 = y1;

        x2 = x1;

        y1 = x1 = 0;

      }

      return quadtree(points);

    }

    function quadtree(data) {

      var d, fx = d3_functor(x), fy = d3_functor(y), xs, ys, i, n, x1_, y1_, x2_, y2_;

      if (x1 != null) {

        x1_ = x1, y1_ = y1, x2_ = x2, y2_ = y2;

      } else {

        x2_ = y2_ = -(x1_ = y1_ = Infinity);

        xs = [], ys = [];

        n = data.length;

        if (compat) for (i = 0; i < n; ++i) {

          d = data[i];

          if (d.x < x1_) x1_ = d.x;

          if (d.y < y1_) y1_ = d.y;

          if (d.x > x2_) x2_ = d.x;

          if (d.y > y2_) y2_ = d.y;

          xs.push(d.x);

          ys.push(d.y);

        } else for (i = 0; i < n; ++i) {

          var x_ = +fx(d = data[i], i), y_ = +fy(d, i);

          if (x_ < x1_) x1_ = x_;

          if (y_ < y1_) y1_ = y_;

          if (x_ > x2_) x2_ = x_;

          if (y_ > y2_) y2_ = y_;

          xs.push(x_);

          ys.push(y_);

        }

      }

      var dx = x2_ - x1_, dy = y2_ - y1_;

      if (dx > dy) y2_ = y1_ + dx; else x2_ = x1_ + dy;

      function insert(n, d, x, y, x1, y1, x2, y2) {

        if (isNaN(x) || isNaN(y)) return;

        if (n.leaf) {

          var nx = n.x, ny = n.y;

          if (nx != null) {

            if (abs(nx - x) + abs(ny - y) < .01) {

              insertChild(n, d, x, y, x1, y1, x2, y2);

            } else {

              var nPoint = n.point;

              n.x = n.y = n.point = null;

              insertChild(n, nPoint, nx, ny, x1, y1, x2, y2);

              insertChild(n, d, x, y, x1, y1, x2, y2);

            }

          } else {

            n.x = x, n.y = y, n.point = d;

          }

        } else {

          insertChild(n, d, x, y, x1, y1, x2, y2);

        }

      }

      function insertChild(n, d, x, y, x1, y1, x2, y2) {

        var sx = (x1 + x2) * .5, sy = (y1 + y2) * .5, right = x >= sx, bottom = y >= sy, i = (bottom << 1) + right;

        n.leaf = false;

        n = n.nodes[i] || (n.nodes[i] = d3_geom_quadtreeNode());

        if (right) x1 = sx; else x2 = sx;

        if (bottom) y1 = sy; else y2 = sy;

        insert(n, d, x, y, x1, y1, x2, y2);

      }

      var root = d3_geom_quadtreeNode();

      root.add = function(d) {

        insert(root, d, +fx(d, ++i), +fy(d, i), x1_, y1_, x2_, y2_);

      };

      root.visit = function(f) {

        d3_geom_quadtreeVisit(f, root, x1_, y1_, x2_, y2_);

      };

      i = -1;

      if (x1 == null) {

        while (++i < n) {

          insert(root, data[i], xs[i], ys[i], x1_, y1_, x2_, y2_);

        }

        --i;

      } else data.forEach(root.add);

      xs = ys = data = d = null;

      return root;

    }

    quadtree.x = function(_) {

      return arguments.length ? (x = _, quadtree) : x;

    };

    quadtree.y = function(_) {

      return arguments.length ? (y = _, quadtree) : y;

    };

    quadtree.extent = function(_) {

      if (!arguments.length) return x1 == null ? null : [ [ x1, y1 ], [ x2, y2 ] ];

      if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = +_[0][0], y1 = +_[0][1], x2 = +_[1][0],

      y2 = +_[1][1];

      return quadtree;

    };

    quadtree.size = function(_) {

      if (!arguments.length) return x1 == null ? null : [ x2 - x1, y2 - y1 ];

      if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = y1 = 0, x2 = +_[0], y2 = +_[1];

      return quadtree;

    };

    return quadtree;

  };

  function d3_geom_quadtreeCompatX(d) {

    return d.x;

  }

  function d3_geom_quadtreeCompatY(d) {

    return d.y;

  }

  function d3_geom_quadtreeNode() {

    return {

      leaf: true,

      nodes: [],

      point: null,

      x: null,

      y: null

    };

  }

  function d3_geom_quadtreeVisit(f, node, x1, y1, x2, y2) {

    if (!f(node, x1, y1, x2, y2)) {

      var sx = (x1 + x2) * .5, sy = (y1 + y2) * .5, children = node.nodes;

      if (children[0]) d3_geom_quadtreeVisit(f, children[0], x1, y1, sx, sy);

      if (children[1]) d3_geom_quadtreeVisit(f, children[1], sx, y1, x2, sy);

      if (children[2]) d3_geom_quadtreeVisit(f, children[2], x1, sy, sx, y2);

      if (children[3]) d3_geom_quadtreeVisit(f, children[3], sx, sy, x2, y2);

    }

  }

  d3.interpolateRgb = d3_interpolateRgb;

  function d3_interpolateRgb(a, b) {

    a = d3.rgb(a);

    b = d3.rgb(b);

    var ar = a.r, ag = a.g, ab = a.b, br = b.r - ar, bg = b.g - ag, bb = b.b - ab;

    return function(t) {

      return "#" + d3_rgb_hex(Math.round(ar + br * t)) + d3_rgb_hex(Math.round(ag + bg * t)) + d3_rgb_hex(Math.round(ab + bb * t));

    };

  }

  d3.interpolateObject = d3_interpolateObject;

  function d3_interpolateObject(a, b) {

    var i = {}, c = {}, k;

    for (k in a) {

      if (k in b) {

        i[k] = d3_interpolate(a[k], b[k]);

      } else {

        c[k] = a[k];

      }

    }

    for (k in b) {

      if (!(k in a)) {

        c[k] = b[k];

      }

    }

    return function(t) {

      for (k in i) c[k] = i[k](t);

      return c;

    };

  }

  d3.interpolateNumber = d3_interpolateNumber;

  function d3_interpolateNumber(a, b) {

    b -= a = +a;

    return function(t) {

      return a + b * t;

    };

  }

  d3.interpolateString = d3_interpolateString;

  function d3_interpolateString(a, b) {

    var bi = d3_interpolate_numberA.lastIndex = d3_interpolate_numberB.lastIndex = 0, am, bm, bs, i = -1, s = [], q = [];

    a = a + "", b = b + "";

    while ((am = d3_interpolate_numberA.exec(a)) && (bm = d3_interpolate_numberB.exec(b))) {

      if ((bs = bm.index) > bi) {

        bs = b.substring(bi, bs);

        if (s[i]) s[i] += bs; else s[++i] = bs;

      }

      if ((am = am[0]) === (bm = bm[0])) {

        if (s[i]) s[i] += bm; else s[++i] = bm;

      } else {

        s[++i] = null;

        q.push({

          i: i,

          x: d3_interpolateNumber(am, bm)

        });

      }

      bi = d3_interpolate_numberB.lastIndex;

    }

    if (bi < b.length) {

      bs = b.substring(bi);

      if (s[i]) s[i] += bs; else s[++i] = bs;

    }

    return s.length < 2 ? q[0] ? (b = q[0].x, function(t) {

      return b(t) + "";

    }) : function() {

      return b;

    } : (b = q.length, function(t) {

      for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);

      return s.join("");

    });

  }

  var d3_interpolate_numberA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g, d3_interpolate_numberB = new RegExp(d3_interpolate_numberA.source, "g");

  d3.interpolate = d3_interpolate;

  function d3_interpolate(a, b) {

    var i = d3.interpolators.length, f;

    while (--i >= 0 && !(f = d3.interpolators[i](a, b))) ;

    return f;

  }

  d3.interpolators = [ function(a, b) {

    var t = typeof b;

    return (t === "string" ? d3_rgb_names.has(b) || /^(#|rgb\(|hsl\()/.test(b) ? d3_interpolateRgb : d3_interpolateString : b instanceof d3_color ? d3_interpolateRgb : Array.isArray(b) ? d3_interpolateArray : t === "object" && isNaN(b) ? d3_interpolateObject : d3_interpolateNumber)(a, b);

  } ];

  d3.interpolateArray = d3_interpolateArray;

  function d3_interpolateArray(a, b) {

    var x = [], c = [], na = a.length, nb = b.length, n0 = Math.min(a.length, b.length), i;

    for (i = 0; i < n0; ++i) x.push(d3_interpolate(a[i], b[i]));

    for (;i < na; ++i) c[i] = a[i];

    for (;i < nb; ++i) c[i] = b[i];

    return function(t) {

      for (i = 0; i < n0; ++i) c[i] = x[i](t);

      return c;

    };

  }

  var d3_ease_default = function() {

    return d3_identity;

  };

  var d3_ease = d3.map({

    linear: d3_ease_default,

    poly: d3_ease_poly,

    quad: function() {

      return d3_ease_quad;

    },

    cubic: function() {

      return d3_ease_cubic;

    },

    sin: function() {

      return d3_ease_sin;

    },

    exp: function() {

      return d3_ease_exp;

    },

    circle: function() {

      return d3_ease_circle;

    },

    elastic: d3_ease_elastic,

    back: d3_ease_back,

    bounce: function() {

      return d3_ease_bounce;

    }

  });

  var d3_ease_mode = d3.map({

    "in": d3_identity,

    out: d3_ease_reverse,

    "in-out": d3_ease_reflect,

    "out-in": function(f) {

      return d3_ease_reflect(d3_ease_reverse(f));

    }

  });

  d3.ease = function(name) {

    var i = name.indexOf("-"), t = i >= 0 ? name.substring(0, i) : name, m = i >= 0 ? name.substring(i + 1) : "in";

    t = d3_ease.get(t) || d3_ease_default;

    m = d3_ease_mode.get(m) || d3_identity;

    return d3_ease_clamp(m(t.apply(null, d3_arraySlice.call(arguments, 1))));

  };

  function d3_ease_clamp(f) {

    return function(t) {

      return t <= 0 ? 0 : t >= 1 ? 1 : f(t);

    };

  }

  function d3_ease_reverse(f) {

    return function(t) {

      return 1 - f(1 - t);

    };

  }

  function d3_ease_reflect(f) {

    return function(t) {

      return .5 * (t < .5 ? f(2 * t) : 2 - f(2 - 2 * t));

    };

  }

  function d3_ease_quad(t) {

    return t * t;

  }

  function d3_ease_cubic(t) {

    return t * t * t;

  }

  function d3_ease_cubicInOut(t) {

    if (t <= 0) return 0;

    if (t >= 1) return 1;

    var t2 = t * t, t3 = t2 * t;

    return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75);

  }

  function d3_ease_poly(e) {

    return function(t) {

      return Math.pow(t, e);

    };

  }

  function d3_ease_sin(t) {

    return 1 - Math.cos(t * half?);

  }

  function d3_ease_exp(t) {

    return Math.pow(2, 10 * (t - 1));

  }

  function d3_ease_circle(t) {

    return 1 - Math.sqrt(1 - t * t);

  }

  function d3_ease_elastic(a, p) {

    var s;

    if (arguments.length < 2) p = .45;

    if (arguments.length) s = p / ? * Math.asin(1 / a); else a = 1, s = p / 4;

    return function(t) {

      return 1 + a * Math.pow(2, -10 * t) * Math.sin((t - s) * ? / p);

    };

  }

  function d3_ease_back(s) {

    if (!s) s = 1.70158;

    return function(t) {

      return t * t * ((s + 1) * t - s);

    };

  }

  function d3_ease_bounce(t) {

    return t < 1 / 2.75 ? 7.5625 * t * t : t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75 : t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375 : 7.5625 * (t -= 2.625 / 2.75) * t + .984375;

  }

  d3.interpolateHcl = d3_interpolateHcl;

  function d3_interpolateHcl(a, b) {

    a = d3.hcl(a);

    b = d3.hcl(b);

    var ah = a.h, ac = a.c, al = a.l, bh = b.h - ah, bc = b.c - ac, bl = b.l - al;

    if (isNaN(bc)) bc = 0, ac = isNaN(ac) ? b.c : ac;

    if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;

    return function(t) {

      return d3_hcl_lab(ah + bh * t, ac + bc * t, al + bl * t) + "";

    };

  }

  d3.interpolateHsl = d3_interpolateHsl;

  function d3_interpolateHsl(a, b) {

    a = d3.hsl(a);

    b = d3.hsl(b);

    var ah = a.h, as = a.s, al = a.l, bh = b.h - ah, bs = b.s - as, bl = b.l - al;

    if (isNaN(bs)) bs = 0, as = isNaN(as) ? b.s : as;

    if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;

    return function(t) {

      return d3_hsl_rgb(ah + bh * t, as + bs * t, al + bl * t) + "";

    };

  }

  d3.interpolateLab = d3_interpolateLab;

  function d3_interpolateLab(a, b) {

    a = d3.lab(a);

    b = d3.lab(b);

    var al = a.l, aa = a.a, ab = a.b, bl = b.l - al, ba = b.a - aa, bb = b.b - ab;

    return function(t) {

      return d3_lab_rgb(al + bl * t, aa + ba * t, ab + bb * t) + "";

    };

  }

  d3.interpolateRound = d3_interpolateRound;

  function d3_interpolateRound(a, b) {

    b -= a;

    return function(t) {

      return Math.round(a + b * t);

    };

  }

  d3.transform = function(string) {

    var g = d3_document.createElementNS(d3.ns.prefix.svg, "g");

    return (d3.transform = function(string) {

      if (string != null) {

        g.setAttribute("transform", string);

        var t = g.transform.baseVal.consolidate();

      }

      return new d3_transform(t ? t.matrix : d3_transformIdentity);

    })(string);

  };

  function d3_transform(m) {

    var r0 = [ m.a, m.b ], r1 = [ m.c, m.d ], kx = d3_transformNormalize(r0), kz = d3_transformDot(r0, r1), ky = d3_transformNormalize(d3_transformCombine(r1, r0, -kz)) || 0;

    if (r0[0] * r1[1] < r1[0] * r0[1]) {

      r0[0] *= -1;

      r0[1] *= -1;

      kx *= -1;

      kz *= -1;

    }

    this.rotate = (kx ? Math.atan2(r0[1], r0[0]) : Math.atan2(-r1[0], r1[1])) * d3_degrees;

    this.translate = [ m.e, m.f ];

    this.scale = [ kx, ky ];

    this.skew = ky ? Math.atan2(kz, ky) * d3_degrees : 0;

  }

  d3_transform.prototype.toString = function() {

    return "translate(" + this.translate + ")rotate(" + this.rotate + ")skewX(" + this.skew + ")scale(" + this.scale + ")";

  };

  function d3_transformDot(a, b) {

    return a[0] * b[0] + a[1] * b[1];

  }

  function d3_transformNormalize(a) {

    var k = Math.sqrt(d3_transformDot(a, a));

    if (k) {

      a[0] /= k;

      a[1] /= k;

    }

    return k;

  }

  function d3_transformCombine(a, b, k) {

    a[0] += k * b[0];

    a[1] += k * b[1];

    return a;

  }

  var d3_transformIdentity = {

    a: 1,

    b: 0,

    c: 0,

    d: 1,

    e: 0,

    f: 0

  };

  d3.interpolateTransform = d3_interpolateTransform;

  function d3_interpolateTransform(a, b) {

    var s = [], q = [], n, A = d3.transform(a), B = d3.transform(b), ta = A.translate, tb = B.translate, ra = A.rotate, rb = B.rotate, wa = A.skew, wb = B.skew, ka = A.scale, kb = B.scale;

    if (ta[0] != tb[0] || ta[1] != tb[1]) {

      s.push("translate(", null, ",", null, ")");

      q.push({

        i: 1,

        x: d3_interpolateNumber(ta[0], tb[0])

      }, {

        i: 3,

        x: d3_interpolateNumber(ta[1], tb[1])

      });

    } else if (tb[0] || tb[1]) {

      s.push("translate(" + tb + ")");

    } else {

      s.push("");

    }

    if (ra != rb) {

      if (ra - rb > 180) rb += 360; else if (rb - ra > 180) ra += 360;

      q.push({

        i: s.push(s.pop() + "rotate(", null, ")") - 2,

        x: d3_interpolateNumber(ra, rb)

      });

    } else if (rb) {

      s.push(s.pop() + "rotate(" + rb + ")");

    }

    if (wa != wb) {

      q.push({

        i: s.push(s.pop() + "skewX(", null, ")") - 2,

        x: d3_interpolateNumber(wa, wb)

      });

    } else if (wb) {

      s.push(s.pop() + "skewX(" + wb + ")");

    }

    if (ka[0] != kb[0] || ka[1] != kb[1]) {

      n = s.push(s.pop() + "scale(", null, ",", null, ")");

      q.push({

        i: n - 4,

        x: d3_interpolateNumber(ka[0], kb[0])

      }, {

        i: n - 2,

        x: d3_interpolateNumber(ka[1], kb[1])

      });

    } else if (kb[0] != 1 || kb[1] != 1) {

      s.push(s.pop() + "scale(" + kb + ")");

    }

    n = q.length;

    return function(t) {

      var i = -1, o;

      while (++i < n) s[(o = q[i]).i] = o.x(t);

      return s.join("");

    };

  }

  function d3_uninterpolateNumber(a, b) {

    b = b - (a = +a) ? 1 / (b - a) : 0;

    return function(x) {

      return (x - a) * b;

    };

  }

  function d3_uninterpolateClamp(a, b) {

    b = b - (a = +a) ? 1 / (b - a) : 0;

    return function(x) {

      return Math.max(0, Math.min(1, (x - a) * b));

    };

  }

  d3.layout = {};

  d3.layout.bundle = function() {

    return function(links) {

      var paths = [], i = -1, n = links.length;

      while (++i < n) paths.push(d3_layout_bundlePath(links[i]));

      return paths;

    };

  };

  function d3_layout_bundlePath(link) {

    var start = link.source, end = link.target, lca = d3_layout_bundleLeastCommonAncestor(start, end), points = [ start ];

    while (start !== lca) {

      start = start.parent;

      points.push(start);

    }

    var k = points.length;

    while (end !== lca) {

      points.splice(k, 0, end);

      end = end.parent;

    }

    return points;

  }

  function d3_layout_bundleAncestors(node) {

    var ancestors = [], parent = node.parent;

    while (parent != null) {

      ancestors.push(node);

      node = parent;

      parent = parent.parent;

    }

    ancestors.push(node);

    return ancestors;

  }

  function d3_layout_bundleLeastCommonAncestor(a, b) {

    if (a === b) return a;

    var aNodes = d3_layout_bundleAncestors(a), bNodes = d3_layout_bundleAncestors(b), aNode = aNodes.pop(), bNode = bNodes.pop(), sharedNode = null;

    while (aNode === bNode) {

      sharedNode = aNode;

      aNode = aNodes.pop();

      bNode = bNodes.pop();

    }

    return sharedNode;

  }

  d3.layout.chord = function() {

    var chord = {}, chords, groups, matrix, n, padding = 0, sortGroups, sortSubgroups, sortChords;

    function relayout() {

      var subgroups = {}, groupSums = [], groupIndex = d3.range(n), subgroupIndex = [], k, x, x0, i, j;

      chords = [];

      groups = [];

      k = 0, i = -1;

      while (++i < n) {

        x = 0, j = -1;

        while (++j < n) {

          x += matrix[i][j];

        }

        groupSums.push(x);

        subgroupIndex.push(d3.range(n));

        k += x;

      }

      if (sortGroups) {

        groupIndex.sort(function(a, b) {

          return sortGroups(groupSums[a], groupSums[b]);

        });

      }

      if (sortSubgroups) {

        subgroupIndex.forEach(function(d, i) {

          d.sort(function(a, b) {

            return sortSubgroups(matrix[i][a], matrix[i][b]);

          });

        });

      }

      k = (? - padding * n) / k;

      x = 0, i = -1;

      while (++i < n) {

        x0 = x, j = -1;

        while (++j < n) {

          var di = groupIndex[i], dj = subgroupIndex[di][j], v = matrix[di][dj], a0 = x, a1 = x += v * k;

          subgroups[di + "-" + dj] = {

            index: di,

            subindex: dj,

            startAngle: a0,

            endAngle: a1,

            value: v

          };

        }

        groups[di] = {

          index: di,

          startAngle: x0,

          endAngle: x,

          value: (x - x0) / k

        };

        x += padding;

      }

      i = -1;

      while (++i < n) {

        j = i - 1;

        while (++j < n) {

          var source = subgroups[i + "-" + j], target = subgroups[j + "-" + i];

          if (source.value || target.value) {

            chords.push(source.value < target.value ? {

              source: target,

              target: source

            } : {

              source: source,

              target: target

            });

          }

        }

      }

      if (sortChords) resort();

    }

    function resort() {

      chords.sort(function(a, b) {

        return sortChords((a.source.value + a.target.value) / 2, (b.source.value + b.target.value) / 2);

      });

    }

    chord.matrix = function(x) {

      if (!arguments.length) return matrix;

      n = (matrix = x) && matrix.length;

      chords = groups = null;

      return chord;

    };

    chord.padding = function(x) {

      if (!arguments.length) return padding;

      padding = x;

      chords = groups = null;

      return chord;

    };

    chord.sortGroups = function(x) {

      if (!arguments.length) return sortGroups;

      sortGroups = x;

      chords = groups = null;

      return chord;

    };

    chord.sortSubgroups = function(x) {

      if (!arguments.length) return sortSubgroups;

      sortSubgroups = x;

      chords = null;

      return chord;

    };

    chord.sortChords = function(x) {

      if (!arguments.length) return sortChords;

      sortChords = x;

      if (chords) resort();

      return chord;

    };

    chord.chords = function() {

      if (!chords) relayout();

      return chords;

    };

    chord.groups = function() {

      if (!groups) relayout();

      return groups;

    };

    return chord;

  };

  d3.layout.force = function() {

    var force = {}, event = d3.dispatch("start", "tick", "end"), size = [ 1, 1 ], drag, alpha, friction = .9, linkDistance = d3_layout_forceLinkDistance, linkStrength = d3_layout_forceLinkStrength, charge = -30, chargeDistance2 = d3_layout_forceChargeDistance2, gravity = .1, theta2 = .64, nodes = [], links = [], distances, strengths, charges;

    function repulse(node) {

      return function(quad, x1, _, x2) {

        if (quad.point !== node) {

          var dx = quad.cx - node.x, dy = quad.cy - node.y, dw = x2 - x1, dn = dx * dx + dy * dy;

          if (dw * dw / theta2 < dn) {

            if (dn < chargeDistance2) {

              var k = quad.charge / dn;

              node.px -= dx * k;

              node.py -= dy * k;

            }

            return true;

          }

          if (quad.point && dn && dn < chargeDistance2) {

            var k = quad.pointCharge / dn;

            node.px -= dx * k;

            node.py -= dy * k;

          }

        }

        return !quad.charge;

      };

    }

    force.tick = function() {

      if ((alpha *= .99) < .005) {

        event.end({

          type: "end",

          alpha: alpha = 0

        });

        return true;

      }

      var n = nodes.length, m = links.length, q, i, o, s, t, l, k, x, y;

      for (i = 0; i < m; ++i) {

        o = links[i];

        s = o.source;

        t = o.target;

        x = t.x - s.x;

        y = t.y - s.y;

        if (l = x * x + y * y) {

          l = alpha * strengths[i] * ((l = Math.sqrt(l)) - distances[i]) / l;

          x *= l;

          y *= l;

          t.x -= x * (k = s.weight / (t.weight + s.weight));

          t.y -= y * k;

          s.x += x * (k = 1 - k);

          s.y += y * k;

        }

      }

      if (k = alpha * gravity) {

        x = size[0] / 2;

        y = size[1] / 2;

        i = -1;

        if (k) while (++i < n) {

          o = nodes[i];

          o.x += (x - o.x) * k;

          o.y += (y - o.y) * k;

        }

      }

      if (charge) {

        d3_layout_forceAccumulate(q = d3.geom.quadtree(nodes), alpha, charges);

        i = -1;

        while (++i < n) {

          if (!(o = nodes[i]).fixed) {

            q.visit(repulse(o));

          }

        }

      }

      i = -1;

      while (++i < n) {

        o = nodes[i];

        if (o.fixed) {

          o.x = o.px;

          o.y = o.py;

        } else {

          o.x -= (o.px - (o.px = o.x)) * friction;

          o.y -= (o.py - (o.py = o.y)) * friction;

        }

      }

      event.tick({

        type: "tick",

        alpha: alpha

      });

    };

    force.nodes = function(x) {

      if (!arguments.length) return nodes;

      nodes = x;

      return force;

    };

    force.links = function(x) {

      if (!arguments.length) return links;

      links = x;

      return force;

    };

    force.size = function(x) {

      if (!arguments.length) return size;

      size = x;

      return force;

    };

    force.linkDistance = function(x) {

      if (!arguments.length) return linkDistance;

      linkDistance = typeof x === "function" ? x : +x;

      return force;

    };

    force.distance = force.linkDistance;

    force.linkStrength = function(x) {

      if (!arguments.length) return linkStrength;

      linkStrength = typeof x === "function" ? x : +x;

      return force;

    };

    force.friction = function(x) {

      if (!arguments.length) return friction;

      friction = +x;

      return force;

    };

    force.charge = function(x) {

      if (!arguments.length) return charge;

      charge = typeof x === "function" ? x : +x;

      return force;

    };

    force.chargeDistance = function(x) {

      if (!arguments.length) return Math.sqrt(chargeDistance2);

      chargeDistance2 = x * x;

      return force;

    };

    force.gravity = function(x) {

      if (!arguments.length) return gravity;

      gravity = +x;

      return force;

    };

    force.theta = function(x) {

      if (!arguments.length) return Math.sqrt(theta2);

      theta2 = x * x;

      return force;

    };

    force.alpha = function(x) {

      if (!arguments.length) return alpha;

      x = +x;

      if (alpha) {

        if (x > 0) alpha = x; else alpha = 0;

      } else if (x > 0) {

        event.start({

          type: "start",

          alpha: alpha = x

        });

        d3.timer(force.tick);

      }

      return force;

    };

    force.start = function() {

      var i, n = nodes.length, m = links.length, w = size[0], h = size[1], neighbors, o;

      for (i = 0; i < n; ++i) {

        (o = nodes[i]).index = i;

        o.weight = 0;

      }

      for (i = 0; i < m; ++i) {

        o = links[i];

        if (typeof o.source == "number") o.source = nodes[o.source];

        if (typeof o.target == "number") o.target = nodes[o.target];

        ++o.source.weight;

        ++o.target.weight;

      }

      for (i = 0; i < n; ++i) {

        o = nodes[i];

        if (isNaN(o.x)) o.x = position("x", w);

        if (isNaN(o.y)) o.y = position("y", h);

        if (isNaN(o.px)) o.px = o.x;

        if (isNaN(o.py)) o.py = o.y;

      }

      distances = [];

      if (typeof linkDistance === "function") for (i = 0; i < m; ++i) distances[i] = +linkDistance.call(this, links[i], i); else for (i = 0; i < m; ++i) distances[i] = linkDistance;

      strengths = [];

      if (typeof linkStrength === "function") for (i = 0; i < m; ++i) strengths[i] = +linkStrength.call(this, links[i], i); else for (i = 0; i < m; ++i) strengths[i] = linkStrength;

      charges = [];

      if (typeof charge === "function") for (i = 0; i < n; ++i) charges[i] = +charge.call(this, nodes[i], i); else for (i = 0; i < n; ++i) charges[i] = charge;

      function position(dimension, size) {

        if (!neighbors) {

          neighbors = new Array(n);

          for (j = 0; j < n; ++j) {

            neighbors[j] = [];

          }

          for (j = 0; j < m; ++j) {

            var o = links[j];

            neighbors[o.source.index].push(o.target);

            neighbors[o.target.index].push(o.source);

          }

        }

        var candidates = neighbors[i], j = -1, m = candidates.length, x;

        while (++j < m) if (!isNaN(x = candidates[j][dimension])) return x;

        return Math.random() * size;

      }

      return force.resume();

    };

    force.resume = function() {

      return force.alpha(.1);

    };

    force.stop = function() {

      return force.alpha(0);

    };

    force.drag = function() {

      if (!drag) drag = d3.behavior.drag().origin(d3_identity).on("dragstart.force", d3_layout_forceDragstart).on("drag.force", dragmove).on("dragend.force", d3_layout_forceDragend);

      if (!arguments.length) return drag;

      this.on("mouseover.force", d3_layout_forceMouseover).on("mouseout.force", d3_layout_forceMouseout).call(drag);

    };

    function dragmove(d) {

      d.px = d3.event.x, d.py = d3.event.y;

      force.resume();

    }

    return d3.rebind(force, event, "on");

  };

  function d3_layout_forceDragstart(d) {

    d.fixed |= 2;

  }

  function d3_layout_forceDragend(d) {

    d.fixed &= ~6;

  }

  function d3_layout_forceMouseover(d) {

    d.fixed |= 4;

    d.px = d.x, d.py = d.y;

  }

  function d3_layout_forceMouseout(d) {

    d.fixed &= ~4;

  }

  function d3_layout_forceAccumulate(quad, alpha, charges) {

    var cx = 0, cy = 0;

    quad.charge = 0;

    if (!quad.leaf) {

      var nodes = quad.nodes, n = nodes.length, i = -1, c;

      while (++i < n) {

        c = nodes[i];

        if (c == null) continue;

        d3_layout_forceAccumulate(c, alpha, charges);

        quad.charge += c.charge;

        cx += c.charge * c.cx;

        cy += c.charge * c.cy;

      }

    }

    if (quad.point) {

      if (!quad.leaf) {

        quad.point.x += Math.random() - .5;

        quad.point.y += Math.random() - .5;

      }

      var k = alpha * charges[quad.point.index];

      quad.charge += quad.pointCharge = k;

      cx += k * quad.point.x;

      cy += k * quad.point.y;

    }

    quad.cx = cx / quad.charge;

    quad.cy = cy / quad.charge;

  }

  var d3_layout_forceLinkDistance = 20, d3_layout_forceLinkStrength = 1, d3_layout_forceChargeDistance2 = Infinity;

  d3.layout.hierarchy = function() {

    var sort = d3_layout_hierarchySort, children = d3_layout_hierarchyChildren, value = d3_layout_hierarchyValue;

    function hierarchy(root) {

      var stack = [ root ], nodes = [], node;

      root.depth = 0;

      while ((node = stack.pop()) != null) {

        nodes.push(node);

        if ((childs = children.call(hierarchy, node, node.depth)) && (n = childs.length)) {

          var n, childs, child;

          while (--n >= 0) {

            stack.push(child = childs[n]);

            child.parent = node;

            child.depth = node.depth + 1;

          }

          if (value) node.value = 0;

          node.children = childs;

        } else {

          if (value) node.value = +value.call(hierarchy, node, node.depth) || 0;

          delete node.children;

        }

      }

      d3_layout_hierarchyVisitAfter(root, function(node) {

        var childs, parent;

        if (sort && (childs = node.children)) childs.sort(sort);

        if (value && (parent = node.parent)) parent.value += node.value;

      });

      return nodes;

    }

    hierarchy.sort = function(x) {

      if (!arguments.length) return sort;

      sort = x;

      return hierarchy;

    };

    hierarchy.children = function(x) {

      if (!arguments.length) return children;

      children = x;

      return hierarchy;

    };

    hierarchy.value = function(x) {

      if (!arguments.length) return value;

      value = x;

      return hierarchy;

    };

    hierarchy.revalue = function(root) {

      if (value) {

        d3_layout_hierarchyVisitBefore(root, function(node) {

          if (node.children) node.value = 0;

        });

        d3_layout_hierarchyVisitAfter(root, function(node) {

          var parent;

          if (!node.children) node.value = +value.call(hierarchy, node, node.depth) || 0;

          if (parent = node.parent) parent.value += node.value;

        });

      }

      return root;

    };

    return hierarchy;

  };

  function d3_layout_hierarchyRebind(object, hierarchy) {

    d3.rebind(object, hierarchy, "sort", "children", "value");

    object.nodes = object;

    object.links = d3_layout_hierarchyLinks;

    return object;

  }

  function d3_layout_hierarchyVisitBefore(node, callback) {

    var nodes = [ node ];

    while ((node = nodes.pop()) != null) {

      callback(node);

      if ((children = node.children) && (n = children.length)) {

        var n, children;

        while (--n >= 0) nodes.push(children[n]);

      }

    }

  }

  function d3_layout_hierarchyVisitAfter(node, callback) {

    var nodes = [ node ], nodes2 = [];

    while ((node = nodes.pop()) != null) {

      nodes2.push(node);

      if ((children = node.children) && (n = children.length)) {

        var i = -1, n, children;

        while (++i < n) nodes.push(children[i]);

      }

    }

    while ((node = nodes2.pop()) != null) {

      callback(node);

    }

  }

  function d3_layout_hierarchyChildren(d) {

    return d.children;

  }

  function d3_layout_hierarchyValue(d) {

    return d.value;

  }

  function d3_layout_hierarchySort(a, b) {

    return b.value - a.value;

  }

  function d3_layout_hierarchyLinks(nodes) {

    return d3.merge(nodes.map(function(parent) {

      return (parent.children || []).map(function(child) {

        return {

          source: parent,

          target: child

        };

      });

    }));

  }

  d3.layout.partition = function() {

    var hierarchy = d3.layout.hierarchy(), size = [ 1, 1 ];

    function position(node, x, dx, dy) {

      var children = node.children;

      node.x = x;

      node.y = node.depth * dy;

      node.dx = dx;

      node.dy = dy;

      if (children && (n = children.length)) {

        var i = -1, n, c, d;

        dx = node.value ? dx / node.value : 0;

        while (++i < n) {

          position(c = children[i], x, d = c.value * dx, dy);

          x += d;

        }

      }

    }

    function depth(node) {

      var children = node.children, d = 0;

      if (children && (n = children.length)) {

        var i = -1, n;

        while (++i < n) d = Math.max(d, depth(children[i]));

      }

      return 1 + d;

    }

    function partition(d, i) {

      var nodes = hierarchy.call(this, d, i);

      position(nodes[0], 0, size[0], size[1] / depth(nodes[0]));

      return nodes;

    }

    partition.size = function(x) {

      if (!arguments.length) return size;

      size = x;

      return partition;

    };

    return d3_layout_hierarchyRebind(partition, hierarchy);

  };

  d3.layout.pie = function() {

    var value = Number, sort = d3_layout_pieSortByValue, startAngle = 0, endAngle = ?;

    function pie(data) {

      var values = data.map(function(d, i) {

        return +value.call(pie, d, i);

      });

      var a = +(typeof startAngle === "function" ? startAngle.apply(this, arguments) : startAngle);

      var k = ((typeof endAngle === "function" ? endAngle.apply(this, arguments) : endAngle) - a) / d3.sum(values);

      var index = d3.range(data.length);

      if (sort != null) index.sort(sort === d3_layout_pieSortByValue ? function(i, j) {

        return values[j] - values[i];

      } : function(i, j) {

        return sort(data[i], data[j]);

      });

      var arcs = [];

      index.forEach(function(i) {

        var d;

        arcs[i] = {

          data: data[i],

          value: d = values[i],

          startAngle: a,

          endAngle: a += d * k

        };

      });

      return arcs;

    }

    pie.value = function(x) {

      if (!arguments.length) return value;

      value = x;

      return pie;

    };

    pie.sort = function(x) {

      if (!arguments.length) return sort;

      sort = x;

      return pie;

    };

    pie.startAngle = function(x) {

      if (!arguments.length) return startAngle;

      startAngle = x;

      return pie;

    };

    pie.endAngle = function(x) {

      if (!arguments.length) return endAngle;

      endAngle = x;

      return pie;

    };

    return pie;

  };

  var d3_layout_pieSortByValue = {};

  d3.layout.stack = function() {

    var values = d3_identity, order = d3_layout_stackOrderDefault, offset = d3_layout_stackOffsetZero, out = d3_layout_stackOut, x = d3_layout_stackX, y = d3_layout_stackY;

    function stack(data, index) {

      var series = data.map(function(d, i) {

        return values.call(stack, d, i);

      });

      var points = series.map(function(d) {

        return d.map(function(v, i) {

          return [ x.call(stack, v, i), y.call(stack, v, i) ];

        });

      });

      var orders = order.call(stack, points, index);

      series = d3.permute(series, orders);

      points = d3.permute(points, orders);

      var offsets = offset.call(stack, points, index);

      var n = series.length, m = series[0].length, i, j, o;

      for (j = 0; j < m; ++j) {

        out.call(stack, series[0][j], o = offsets[j], points[0][j][1]);

        for (i = 1; i < n; ++i) {

          out.call(stack, series[i][j], o += points[i - 1][j][1], points[i][j][1]);

        }

      }

      return data;

    }

    stack.values = function(x) {

      if (!arguments.length) return values;

      values = x;

      return stack;

    };

    stack.order = function(x) {

      if (!arguments.length) return order;

      order = typeof x === "function" ? x : d3_layout_stackOrders.get(x) || d3_layout_stackOrderDefault;

      return stack;

    };

    stack.offset = function(x) {

      if (!arguments.length) return offset;

      offset = typeof x === "function" ? x : d3_layout_stackOffsets.get(x) || d3_layout_stackOffsetZero;

      return stack;

    };

    stack.x = function(z) {

      if (!arguments.length) return x;

      x = z;

      return stack;

    };

    stack.y = function(z) {

      if (!arguments.length) return y;

      y = z;

      return stack;

    };

    stack.out = function(z) {

      if (!arguments.length) return out;

      out = z;

      return stack;

    };

    return stack;

  };

  function d3_layout_stackX(d) {

    return d.x;

  }

  function d3_layout_stackY(d) {

    return d.y;

  }

  function d3_layout_stackOut(d, y0, y) {

    d.y0 = y0;

    d.y = y;

  }

  var d3_layout_stackOrders = d3.map({

    "inside-out": function(data) {

      var n = data.length, i, j, max = data.map(d3_layout_stackMaxIndex), sums = data.map(d3_layout_stackReduceSum), index = d3.range(n).sort(function(a, b) {

        return max[a] - max[b];

      }), top = 0, bottom = 0, tops = [], bottoms = [];

      for (i = 0; i < n; ++i) {

        j = index[i];

        if (top < bottom) {

          top += sums[j];

          tops.push(j);

        } else {

          bottom += sums[j];

          bottoms.push(j);

        }

      }

      return bottoms.reverse().concat(tops);

    },

    reverse: function(data) {

      return d3.range(data.length).reverse();

    },

    "default": d3_layout_stackOrderDefault

  });

  var d3_layout_stackOffsets = d3.map({

    silhouette: function(data) {

      var n = data.length, m = data[0].length, sums = [], max = 0, i, j, o, y0 = [];

      for (j = 0; j < m; ++j) {

        for (i = 0, o = 0; i < n; i++) o += data[i][j][1];

        if (o > max) max = o;

        sums.push(o);

      }

      for (j = 0; j < m; ++j) {

        y0[j] = (max - sums[j]) / 2;

      }

      return y0;

    },

    wiggle: function(data) {

      var n = data.length, x = data[0], m = x.length, i, j, k, s1, s2, s3, dx, o, o0, y0 = [];

      y0[0] = o = o0 = 0;

      for (j = 1; j < m; ++j) {

        for (i = 0, s1 = 0; i < n; ++i) s1 += data[i][j][1];

        for (i = 0, s2 = 0, dx = x[j][0] - x[j - 1][0]; i < n; ++i) {

          for (k = 0, s3 = (data[i][j][1] - data[i][j - 1][1]) / (2 * dx); k < i; ++k) {

            s3 += (data[k][j][1] - data[k][j - 1][1]) / dx;

          }

          s2 += s3 * data[i][j][1];

        }

        y0[j] = o -= s1 ? s2 / s1 * dx : 0;

        if (o < o0) o0 = o;

      }

      for (j = 0; j < m; ++j) y0[j] -= o0;

      return y0;

    },

    expand: function(data) {

      var n = data.length, m = data[0].length, k = 1 / n, i, j, o, y0 = [];

      for (j = 0; j < m; ++j) {

        for (i = 0, o = 0; i < n; i++) o += data[i][j][1];

        if (o) for (i = 0; i < n; i++) data[i][j][1] /= o; else for (i = 0; i < n; i++) data[i][j][1] = k;

      }

      for (j = 0; j < m; ++j) y0[j] = 0;

      return y0;

    },

    zero: d3_layout_stackOffsetZero

  });

  function d3_layout_stackOrderDefault(data) {

    return d3.range(data.length);

  }

  function d3_layout_stackOffsetZero(data) {

    var j = -1, m = data[0].length, y0 = [];

    while (++j < m) y0[j] = 0;

    return y0;

  }

  function d3_layout_stackMaxIndex(array) {

    var i = 1, j = 0, v = array[0][1], k, n = array.length;

    for (;i < n; ++i) {

      if ((k = array[i][1]) > v) {

        j = i;

        v = k;

      }

    }

    return j;

  }

  function d3_layout_stackReduceSum(d) {

    return d.reduce(d3_layout_stackSum, 0);

  }

  function d3_layout_stackSum(p, d) {

    return p + d[1];

  }

  d3.layout.histogram = function() {

    var frequency = true, valuer = Number, ranger = d3_layout_histogramRange, binner = d3_layout_histogramBinSturges;

    function histogram(data, i) {

      var bins = [], values = data.map(valuer, this), range = ranger.call(this, values, i), thresholds = binner.call(this, range, values, i), bin, i = -1, n = values.length, m = thresholds.length - 1, k = frequency ? 1 : 1 / n, x;

      while (++i < m) {

        bin = bins[i] = [];

        bin.dx = thresholds[i + 1] - (bin.x = thresholds[i]);

        bin.y = 0;

      }

      if (m > 0) {

        i = -1;

        while (++i < n) {

          x = values[i];

          if (x >= range[0] && x <= range[1]) {

            bin = bins[d3.bisect(thresholds, x, 1, m) - 1];

            bin.y += k;

            bin.push(data[i]);

          }

        }

      }

      return bins;

    }

    histogram.value = function(x) {

      if (!arguments.length) return valuer;

      valuer = x;

      return histogram;

    };

    histogram.range = function(x) {

      if (!arguments.length) return ranger;

      ranger = d3_functor(x);

      return histogram;

    };

    histogram.bins = function(x) {

      if (!arguments.length) return binner;

      binner = typeof x === "number" ? function(range) {

        return d3_layout_histogramBinFixed(range, x);

      } : d3_functor(x);

      return histogram;

    };

    histogram.frequency = function(x) {

      if (!arguments.length) return frequency;

      frequency = !!x;

      return histogram;

    };

    return histogram;

  };

  function d3_layout_histogramBinSturges(range, values) {

    return d3_layout_histogramBinFixed(range, Math.ceil(Math.log(values.length) / Math.LN2 + 1));

  }

  function d3_layout_histogramBinFixed(range, n) {

    var x = -1, b = +range[0], m = (range[1] - b) / n, f = [];

    while (++x <= n) f[x] = m * x + b;

    return f;

  }

  function d3_layout_histogramRange(values) {

    return [ d3.min(values), d3.max(values) ];

  }

  d3.layout.pack = function() {

    var hierarchy = d3.layout.hierarchy().sort(d3_layout_packSort), padding = 0, size = [ 1, 1 ], radius;

    function pack(d, i) {

      var nodes = hierarchy.call(this, d, i), root = nodes[0], w = size[0], h = size[1], r = radius == null ? Math.sqrt : typeof radius === "function" ? radius : function() {

        return radius;

      };

      root.x = root.y = 0;

      d3_layout_hierarchyVisitAfter(root, function(d) {

        d.r = +r(d.value);

      });

      d3_layout_hierarchyVisitAfter(root, d3_layout_packSiblings);

      if (padding) {

        var dr = padding * (radius ? 1 : Math.max(2 * root.r / w, 2 * root.r / h)) / 2;

        d3_layout_hierarchyVisitAfter(root, function(d) {

          d.r += dr;

        });

        d3_layout_hierarchyVisitAfter(root, d3_layout_packSiblings);

        d3_layout_hierarchyVisitAfter(root, function(d) {

          d.r -= dr;

        });

      }

      d3_layout_packTransform(root, w / 2, h / 2, radius ? 1 : 1 / Math.max(2 * root.r / w, 2 * root.r / h));

      return nodes;

    }

    pack.size = function(_) {

      if (!arguments.length) return size;

      size = _;

      return pack;

    };

    pack.radius = function(_) {

      if (!arguments.length) return radius;

      radius = _ == null || typeof _ === "function" ? _ : +_;

      return pack;

    };

    pack.padding = function(_) {

      if (!arguments.length) return padding;

      padding = +_;

      return pack;

    };

    return d3_layout_hierarchyRebind(pack, hierarchy);

  };

  function d3_layout_packSort(a, b) {

    return a.value - b.value;

  }

  function d3_layout_packInsert(a, b) {

    var c = a._pack_next;

    a._pack_next = b;

    b._pack_prev = a;

    b._pack_next = c;

    c._pack_prev = b;

  }

  function d3_layout_packSplice(a, b) {

    a._pack_next = b;

    b._pack_prev = a;

  }

  function d3_layout_packIntersects(a, b) {

    var dx = b.x - a.x, dy = b.y - a.y, dr = a.r + b.r;

    return .999 * dr * dr > dx * dx + dy * dy;

  }

  function d3_layout_packSiblings(node) {

    if (!(nodes = node.children) || !(n = nodes.length)) return;

    var nodes, xMin = Infinity, xMax = -Infinity, yMin = Infinity, yMax = -Infinity, a, b, c, i, j, k, n;

    function bound(node) {

      xMin = Math.min(node.x - node.r, xMin);

      xMax = Math.max(node.x + node.r, xMax);

      yMin = Math.min(node.y - node.r, yMin);

      yMax = Math.max(node.y + node.r, yMax);

    }

    nodes.forEach(d3_layout_packLink);

    a = nodes[0];

    a.x = -a.r;

    a.y = 0;

    bound(a);

    if (n > 1) {

      b = nodes[1];

      b.x = b.r;

      b.y = 0;

      bound(b);

      if (n > 2) {

        c = nodes[2];

        d3_layout_packPlace(a, b, c);

        bound(c);

        d3_layout_packInsert(a, c);

        a._pack_prev = c;

        d3_layout_packInsert(c, b);

        b = a._pack_next;

        for (i = 3; i < n; i++) {

          d3_layout_packPlace(a, b, c = nodes[i]);

          var isect = 0, s1 = 1, s2 = 1;

          for (j = b._pack_next; j !== b; j = j._pack_next, s1++) {

            if (d3_layout_packIntersects(j, c)) {

              isect = 1;

              break;

            }

          }

          if (isect == 1) {

            for (k = a._pack_prev; k !== j._pack_prev; k = k._pack_prev, s2++) {

              if (d3_layout_packIntersects(k, c)) {

                break;

              }

            }

          }

          if (isect) {

            if (s1 < s2 || s1 == s2 && b.r < a.r) d3_layout_packSplice(a, b = j); else d3_layout_packSplice(a = k, b);

            i--;

          } else {

            d3_layout_packInsert(a, c);

            b = c;

            bound(c);

          }

        }

      }

    }

    var cx = (xMin + xMax) / 2, cy = (yMin + yMax) / 2, cr = 0;

    for (i = 0; i < n; i++) {

      c = nodes[i];

      c.x -= cx;

      c.y -= cy;

      cr = Math.max(cr, c.r + Math.sqrt(c.x * c.x + c.y * c.y));

    }

    node.r = cr;

    nodes.forEach(d3_layout_packUnlink);

  }

  function d3_layout_packLink(node) {

    node._pack_next = node._pack_prev = node;

  }

  function d3_layout_packUnlink(node) {

    delete node._pack_next;

    delete node._pack_prev;

  }

  function d3_layout_packTransform(node, x, y, k) {

    var children = node.children;

    node.x = x += k * node.x;

    node.y = y += k * node.y;

    node.r *= k;

    if (children) {

      var i = -1, n = children.length;

      while (++i < n) d3_layout_packTransform(children[i], x, y, k);

    }

  }

  function d3_layout_packPlace(a, b, c) {

    var db = a.r + c.r, dx = b.x - a.x, dy = b.y - a.y;

    if (db && (dx || dy)) {

      var da = b.r + c.r, dc = dx * dx + dy * dy;

      da *= da;

      db *= db;

      var x = .5 + (db - da) / (2 * dc), y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);

      c.x = a.x + x * dx + y * dy;

      c.y = a.y + x * dy - y * dx;

    } else {

      c.x = a.x + db;

      c.y = a.y;

    }

  }

  d3.layout.tree = function() {

    var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = null;

    function tree(d, i) {

      var nodes = hierarchy.call(this, d, i), root0 = nodes[0], root1 = wrapTree(root0);

      d3_layout_hierarchyVisitAfter(root1, firstWalk), root1.parent.m = -root1.z;

      d3_layout_hierarchyVisitBefore(root1, secondWalk);

      if (nodeSize) d3_layout_hierarchyVisitBefore(root0, sizeNode); else {

        var left = root0, right = root0, bottom = root0;

        d3_layout_hierarchyVisitBefore(root0, function(node) {

          if (node.x < left.x) left = node;

          if (node.x > right.x) right = node;

          if (node.depth > bottom.depth) bottom = node;

        });

        var tx = separation(left, right) / 2 - left.x, kx = size[0] / (right.x + separation(right, left) / 2 + tx), ky = size[1] / (bottom.depth || 1);

        d3_layout_hierarchyVisitBefore(root0, function(node) {

          node.x = (node.x + tx) * kx;

          node.y = node.depth * ky;

        });

      }

      return nodes;

    }

    function wrapTree(root0) {

      var root1 = {

        A: null,

        children: [ root0 ]

      }, queue = [ root1 ], node1;

      while ((node1 = queue.pop()) != null) {

        for (var children = node1.children, child, i = 0, n = children.length; i < n; ++i) {

          queue.push((children[i] = child = {

            _: children[i],

            parent: node1,

            children: (child = children[i].children) && child.slice() || [],

            A: null,

            a: null,

            z: 0,

            m: 0,

            c: 0,

            s: 0,

            t: null,

            i: i

          }).a = child);

        }

      }

      return root1.children[0];

    }

    function firstWalk(v) {

      var children = v.children, siblings = v.parent.children, w = v.i ? siblings[v.i - 1] : null;

      if (children.length) {

        d3_layout_treeShift(v);

        var midpoint = (children[0].z + children[children.length - 1].z) / 2;

        if (w) {

          v.z = w.z + separation(v._, w._);

          v.m = v.z - midpoint;

        } else {

          v.z = midpoint;

        }

      } else if (w) {

        v.z = w.z + separation(v._, w._);

      }

      v.parent.A = apportion(v, w, v.parent.A || siblings[0]);

    }

    function secondWalk(v) {

      v._.x = v.z + v.parent.m;

      v.m += v.parent.m;

    }

    function apportion(v, w, ancestor) {

      if (w) {

        var vip = v, vop = v, vim = w, vom = vip.parent.children[0], sip = vip.m, sop = vop.m, sim = vim.m, som = vom.m, shift;

        while (vim = d3_layout_treeRight(vim), vip = d3_layout_treeLeft(vip), vim && vip) {

          vom = d3_layout_treeLeft(vom);

          vop = d3_layout_treeRight(vop);

          vop.a = v;

          shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);

          if (shift > 0) {

            d3_layout_treeMove(d3_layout_treeAncestor(vim, v, ancestor), v, shift);

            sip += shift;

            sop += shift;

          }

          sim += vim.m;

          sip += vip.m;

          som += vom.m;

          sop += vop.m;

        }

        if (vim && !d3_layout_treeRight(vop)) {

          vop.t = vim;

          vop.m += sim - sop;

        }

        if (vip && !d3_layout_treeLeft(vom)) {

          vom.t = vip;

          vom.m += sip - som;

          ancestor = v;

        }

      }

      return ancestor;

    }

    function sizeNode(node) {

      node.x *= size[0];

      node.y = node.depth * size[1];

    }

    tree.separation = function(x) {

      if (!arguments.length) return separation;

      separation = x;

      return tree;

    };

    tree.size = function(x) {

      if (!arguments.length) return nodeSize ? null : size;

      nodeSize = (size = x) == null ? sizeNode : null;

      return tree;

    };

    tree.nodeSize = function(x) {

      if (!arguments.length) return nodeSize ? size : null;

      nodeSize = (size = x) == null ? null : sizeNode;

      return tree;

    };

    return d3_layout_hierarchyRebind(tree, hierarchy);

  };

  function d3_layout_treeSeparation(a, b) {

    return a.parent == b.parent ? 1 : 2;

  }

  function d3_layout_treeLeft(v) {

    var children = v.children;

    return children.length ? children[0] : v.t;

  }

  function d3_layout_treeRight(v) {

    var children = v.children, n;

    return (n = children.length) ? children[n - 1] : v.t;

  }

  function d3_layout_treeMove(wm, wp, shift) {

    var change = shift / (wp.i - wm.i);

    wp.c -= change;

    wp.s += shift;

    wm.c += change;

    wp.z += shift;

    wp.m += shift;

  }

  function d3_layout_treeShift(v) {

    var shift = 0, change = 0, children = v.children, i = children.length, w;

    while (--i >= 0) {

      w = children[i];

      w.z += shift;

      w.m += shift;

      shift += w.s + (change += w.c);

    }

  }

  function d3_layout_treeAncestor(vim, v, ancestor) {

    return vim.a.parent === v.parent ? vim.a : ancestor;

  }

  d3.layout.cluster = function() {

    var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = false;

    function cluster(d, i) {

      var nodes = hierarchy.call(this, d, i), root = nodes[0], previousNode, x = 0;

      d3_layout_hierarchyVisitAfter(root, function(node) {

        var children = node.children;

        if (children && children.length) {

          node.x = d3_layout_clusterX(children);

          node.y = d3_layout_clusterY(children);

        } else {

          node.x = previousNode ? x += separation(node, previousNode) : 0;

          node.y = 0;

          previousNode = node;

        }

      });

      var left = d3_layout_clusterLeft(root), right = d3_layout_clusterRight(root), x0 = left.x - separation(left, right) / 2, x1 = right.x + separation(right, left) / 2;

      d3_layout_hierarchyVisitAfter(root, nodeSize ? function(node) {

        node.x = (node.x - root.x) * size[0];

        node.y = (root.y - node.y) * size[1];

      } : function(node) {

        node.x = (node.x - x0) / (x1 - x0) * size[0];

        node.y = (1 - (root.y ? node.y / root.y : 1)) * size[1];

      });

      return nodes;

    }

    cluster.separation = function(x) {

      if (!arguments.length) return separation;

      separation = x;

      return cluster;

    };

    cluster.size = function(x) {

      if (!arguments.length) return nodeSize ? null : size;

      nodeSize = (size = x) == null;

      return cluster;

    };

    cluster.nodeSize = function(x) {

      if (!arguments.length) return nodeSize ? size : null;

      nodeSize = (size = x) != null;

      return cluster;

    };

    return d3_layout_hierarchyRebind(cluster, hierarchy);

  };

  function d3_layout_clusterY(children) {

    return 1 + d3.max(children, function(child) {

      return child.y;

    });

  }

  function d3_layout_clusterX(children) {

    return children.reduce(function(x, child) {

      return x + child.x;

    }, 0) / children.length;

  }

  function d3_layout_clusterLeft(node) {

    var children = node.children;

    return children && children.length ? d3_layout_clusterLeft(children[0]) : node;

  }

  function d3_layout_clusterRight(node) {

    var children = node.children, n;

    return children && (n = children.length) ? d3_layout_clusterRight(children[n - 1]) : node;

  }

  d3.layout.treemap = function() {

    var hierarchy = d3.layout.hierarchy(), round = Math.round, size = [ 1, 1 ], padding = null, pad = d3_layout_treemapPadNull, sticky = false, stickies, mode = "squarify", ratio = .5 * (1 + Math.sqrt(5));

    function scale(children, k) {

      var i = -1, n = children.length, child, area;

      while (++i < n) {

        area = (child = children[i]).value * (k < 0 ? 0 : k);

        child.area = isNaN(area) || area <= 0 ? 0 : area;

      }

    }

    function squarify(node) {

      var children = node.children;

      if (children && children.length) {

        var rect = pad(node), row = [], remaining = children.slice(), child, best = Infinity, score, u = mode === "slice" ? rect.dx : mode === "dice" ? rect.dy : mode === "slice-dice" ? node.depth & 1 ? rect.dy : rect.dx : Math.min(rect.dx, rect.dy), n;

        scale(remaining, rect.dx * rect.dy / node.value);

        row.area = 0;

        while ((n = remaining.length) > 0) {

          row.push(child = remaining[n - 1]);

          row.area += child.area;

          if (mode !== "squarify" || (score = worst(row, u)) <= best) {

            remaining.pop();

            best = score;

          } else {

            row.area -= row.pop().area;

            position(row, u, rect, false);

            u = Math.min(rect.dx, rect.dy);

            row.length = row.area = 0;

            best = Infinity;

          }

        }

        if (row.length) {

          position(row, u, rect, true);

          row.length = row.area = 0;

        }

        children.forEach(squarify);

      }

    }

    function stickify(node) {

      var children = node.children;

      if (children && children.length) {

        var rect = pad(node), remaining = children.slice(), child, row = [];

        scale(remaining, rect.dx * rect.dy / node.value);

        row.area = 0;

        while (child = remaining.pop()) {

          row.push(child);

          row.area += child.area;

          if (child.z != null) {

            position(row, child.z ? rect.dx : rect.dy, rect, !remaining.length);

            row.length = row.area = 0;

          }

        }

        children.forEach(stickify);

      }

    }

    function worst(row, u) {

      var s = row.area, r, rmax = 0, rmin = Infinity, i = -1, n = row.length;

      while (++i < n) {

        if (!(r = row[i].area)) continue;

        if (r < rmin) rmin = r;

        if (r > rmax) rmax = r;

      }

      s *= s;

      u *= u;

      return s ? Math.max(u * rmax * ratio / s, s / (u * rmin * ratio)) : Infinity;

    }

    function position(row, u, rect, flush) {

      var i = -1, n = row.length, x = rect.x, y = rect.y, v = u ? round(row.area / u) : 0, o;

      if (u == rect.dx) {

        if (flush || v > rect.dy) v = rect.dy;

        while (++i < n) {

          o = row[i];

          o.x = x;

          o.y = y;

          o.dy = v;

          x += o.dx = Math.min(rect.x + rect.dx - x, v ? round(o.area / v) : 0);

        }

        o.z = true;

        o.dx += rect.x + rect.dx - x;

        rect.y += v;

        rect.dy -= v;

      } else {

        if (flush || v > rect.dx) v = rect.dx;

        while (++i < n) {

          o = row[i];

          o.x = x;

          o.y = y;

          o.dx = v;

          y += o.dy = Math.min(rect.y + rect.dy - y, v ? round(o.area / v) : 0);

        }

        o.z = false;

        o.dy += rect.y + rect.dy - y;

        rect.x += v;

        rect.dx -= v;

      }

    }

    function treemap(d) {

      var nodes = stickies || hierarchy(d), root = nodes[0];

      root.x = 0;

      root.y = 0;

      root.dx = size[0];

      root.dy = size[1];

      if (stickies) hierarchy.revalue(root);

      scale([ root ], root.dx * root.dy / root.value);

      (stickies ? stickify : squarify)(root);

      if (sticky) stickies = nodes;

      return nodes;

    }

    treemap.size = function(x) {

      if (!arguments.length) return size;

      size = x;

      return treemap;

    };

    treemap.padding = function(x) {

      if (!arguments.length) return padding;

      function padFunction(node) {

        var p = x.call(treemap, node, node.depth);

        return p == null ? d3_layout_treemapPadNull(node) : d3_layout_treemapPad(node, typeof p === "number" ? [ p, p, p, p ] : p);

      }

      function padConstant(node) {

        return d3_layout_treemapPad(node, x);

      }

      var type;

      pad = (padding = x) == null ? d3_layout_treemapPadNull : (type = typeof x) === "function" ? padFunction : type === "number" ? (x = [ x, x, x, x ],

      padConstant) : padConstant;

      return treemap;

    };

    treemap.round = function(x) {

      if (!arguments.length) return round != Number;

      round = x ? Math.round : Number;

      return treemap;

    };

    treemap.sticky = function(x) {

      if (!arguments.length) return sticky;

      sticky = x;

      stickies = null;

      return treemap;

    };

    treemap.ratio = function(x) {

      if (!arguments.length) return ratio;

      ratio = x;

      return treemap;

    };

    treemap.mode = function(x) {

      if (!arguments.length) return mode;

      mode = x + "";

      return treemap;

    };

    return d3_layout_hierarchyRebind(treemap, hierarchy);

  };

  function d3_layout_treemapPadNull(node) {

    return {

      x: node.x,

      y: node.y,

      dx: node.dx,

      dy: node.dy

    };

  }

  function d3_layout_treemapPad(node, padding) {

    var x = node.x + padding[3], y = node.y + padding[0], dx = node.dx - padding[1] - padding[3], dy = node.dy - padding[0] - padding[2];

    if (dx < 0) {

      x += dx / 2;

      dx = 0;

    }

    if (dy < 0) {

      y += dy / 2;

      dy = 0;

    }

    return {

      x: x,

      y: y,

      dx: dx,

      dy: dy

    };

  }

  d3.random = {

    normal: function(?, ?) {

      var n = arguments.length;

      if (n < 2) ? = 1;

      if (n < 1) ? = 0;

      return function() {

        var x, y, r;

        do {

          x = Math.random() * 2 - 1;

          y = Math.random() * 2 - 1;

          r = x * x + y * y;

        } while (!r || r > 1);

        return ? + ? * x * Math.sqrt(-2 * Math.log(r) / r);

      };

    },

    logNormal: function() {

      var random = d3.random.normal.apply(d3, arguments);

      return function() {

        return Math.exp(random());

      };

    },

    bates: function(m) {

      var random = d3.random.irwinHall(m);

      return function() {

        return random() / m;

      };

    },

    irwinHall: function(m) {

      return function() {

        for (var s = 0, j = 0; j < m; j++) s += Math.random();

        return s;

      };

    }

  };

  d3.scale = {};

  function d3_scaleExtent(domain) {

    var start = domain[0], stop = domain[domain.length - 1];

    return start < stop ? [ start, stop ] : [ stop, start ];

  }

  function d3_scaleRange(scale) {

    return scale.rangeExtent ? scale.rangeExtent() : d3_scaleExtent(scale.range());

  }

  function d3_scale_bilinear(domain, range, uninterpolate, interpolate) {

    var u = uninterpolate(domain[0], domain[1]), i = interpolate(range[0], range[1]);

    return function(x) {

      return i(u(x));

    };

  }

  function d3_scale_nice(domain, nice) {

    var i0 = 0, i1 = domain.length - 1, x0 = domain[i0], x1 = domain[i1], dx;

    if (x1 < x0) {

      dx = i0, i0 = i1, i1 = dx;

      dx = x0, x0 = x1, x1 = dx;

    }

    domain[i0] = nice.floor(x0);

    domain[i1] = nice.ceil(x1);

    return domain;

  }

  function d3_scale_niceStep(step) {

    return step ? {

      floor: function(x) {

        return Math.floor(x / step) * step;

      },

      ceil: function(x) {

        return Math.ceil(x / step) * step;

      }

    } : d3_scale_niceIdentity;

  }

  var d3_scale_niceIdentity = {

    floor: d3_identity,

    ceil: d3_identity

  };

  function d3_scale_polylinear(domain, range, uninterpolate, interpolate) {

    var u = [], i = [], j = 0, k = Math.min(domain.length, range.length) - 1;

    if (domain[k] < domain[0]) {

      domain = domain.slice().reverse();

      range = range.slice().reverse();

    }

    while (++j <= k) {

      u.push(uninterpolate(domain[j - 1], domain[j]));

      i.push(interpolate(range[j - 1], range[j]));

    }

    return function(x) {

      var j = d3.bisect(domain, x, 1, k) - 1;

      return i[j](u[j](x));

    };

  }

  d3.scale.linear = function() {

    return d3_scale_linear([ 0, 1 ], [ 0, 1 ], d3_interpolate, false);

  };

  function d3_scale_linear(domain, range, interpolate, clamp) {

    var output, input;

    function rescale() {

      var linear = Math.min(domain.length, range.length) > 2 ? d3_scale_polylinear : d3_scale_bilinear, uninterpolate = clamp ? d3_uninterpolateClamp : d3_uninterpolateNumber;

      output = linear(domain, range, uninterpolate, interpolate);

      input = linear(range, domain, uninterpolate, d3_interpolate);

      return scale;

    }

    function scale(x) {

      return output(x);

    }

    scale.invert = function(y) {

      return input(y);

    };

    scale.domain = function(x) {

      if (!arguments.length) return domain;

      domain = x.map(Number);

      return rescale();

    };

    scale.range = function(x) {

      if (!arguments.length) return range;

      range = x;

      return rescale();

    };

    scale.rangeRound = function(x) {

      return scale.range(x).interpolate(d3_interpolateRound);

    };

    scale.clamp = function(x) {

      if (!arguments.length) return clamp;

      clamp = x;

      return rescale();

    };

    scale.interpolate = function(x) {

      if (!arguments.length) return interpolate;

      interpolate = x;

      return rescale();

    };

    scale.ticks = function(m) {

      return d3_scale_linearTicks(domain, m);

    };

    scale.tickFormat = function(m, format) {

      return d3_scale_linearTickFormat(domain, m, format);

    };

    scale.nice = function(m) {

      d3_scale_linearNice(domain, m);

      return rescale();

    };

    scale.copy = function() {

      return d3_scale_linear(domain, range, interpolate, clamp);

    };

    return rescale();

  }

  function d3_scale_linearRebind(scale, linear) {

    return d3.rebind(scale, linear, "range", "rangeRound", "interpolate", "clamp");

  }

  function d3_scale_linearNice(domain, m) {

    return d3_scale_nice(domain, d3_scale_niceStep(d3_scale_linearTickRange(domain, m)[2]));

  }

  function d3_scale_linearTickRange(domain, m) {

    if (m == null) m = 10;

    var extent = d3_scaleExtent(domain), span = extent[1] - extent[0], step = Math.pow(10, Math.floor(Math.log(span / m) / Math.LN10)), err = m / span * step;

    if (err <= .15) step *= 10; else if (err <= .35) step *= 5; else if (err <= .75) step *= 2;

    extent[0] = Math.ceil(extent[0] / step) * step;

    extent[1] = Math.floor(extent[1] / step) * step + step * .5;

    extent[2] = step;

    return extent;

  }

  function d3_scale_linearTicks(domain, m) {

    return d3.range.apply(d3, d3_scale_linearTickRange(domain, m));

  }

  function d3_scale_linearTickFormat(domain, m, format) {

    var range = d3_scale_linearTickRange(domain, m);

    if (format) {

      var match = d3_format_re.exec(format);

      match.shift();

      if (match[8] === "s") {

        var prefix = d3.formatPrefix(Math.max(abs(range[0]), abs(range[1])));

        if (!match[7]) match[7] = "." + d3_scale_linearPrecision(prefix.scale(range[2]));

        match[8] = "f";

        format = d3.format(match.join(""));

        return function(d) {

          return format(prefix.scale(d)) + prefix.symbol;

        };

      }

      if (!match[7]) match[7] = "." + d3_scale_linearFormatPrecision(match[8], range);

      format = match.join("");

    } else {

      format = ",." + d3_scale_linearPrecision(range[2]) + "f";

    }

    return d3.format(format);

  }

  var d3_scale_linearFormatSignificant = {

    s: 1,

    g: 1,

    p: 1,

    r: 1,

    e: 1

  };

  function d3_scale_linearPrecision(value) {

    return -Math.floor(Math.log(value) / Math.LN10 + .01);

  }

  function d3_scale_linearFormatPrecision(type, range) {

    var p = d3_scale_linearPrecision(range[2]);

    return type in d3_scale_linearFormatSignificant ? Math.abs(p - d3_scale_linearPrecision(Math.max(abs(range[0]), abs(range[1])))) + +(type !== "e") : p - (type === "%") * 2;

  }

  d3.scale.log = function() {

    return d3_scale_log(d3.scale.linear().domain([ 0, 1 ]), 10, true, [ 1, 10 ]);

  };

  function d3_scale_log(linear, base, positive, domain) {

    function log(x) {

      return (positive ? Math.log(x < 0 ? 0 : x) : -Math.log(x > 0 ? 0 : -x)) / Math.log(base);

    }

    function pow(x) {

      return positive ? Math.pow(base, x) : -Math.pow(base, -x);

    }

    function scale(x) {

      return linear(log(x));

    }

    scale.invert = function(x) {

      return pow(linear.invert(x));

    };

    scale.domain = function(x) {

      if (!arguments.length) return domain;

      positive = x[0] >= 0;

      linear.domain((domain = x.map(Number)).map(log));

      return scale;

    };

    scale.base = function(_) {

      if (!arguments.length) return base;

      base = +_;

      linear.domain(domain.map(log));

      return scale;

    };

    scale.nice = function() {

      var niced = d3_scale_nice(domain.map(log), positive ? Math : d3_scale_logNiceNegative);

      linear.domain(niced);

      domain = niced.map(pow);

      return scale;

    };

    scale.ticks = function() {

      var extent = d3_scaleExtent(domain), ticks = [], u = extent[0], v = extent[1], i = Math.floor(log(u)), j = Math.ceil(log(v)), n = base % 1 ? 2 : base;

      if (isFinite(j - i)) {

        if (positive) {

          for (;i < j; i++) for (var k = 1; k < n; k++) ticks.push(pow(i) * k);

          ticks.push(pow(i));

        } else {

          ticks.push(pow(i));

          for (;i++ < j; ) for (var k = n - 1; k > 0; k--) ticks.push(pow(i) * k);

        }

        for (i = 0; ticks[i] < u; i++) {}

        for (j = ticks.length; ticks[j - 1] > v; j--) {}

        ticks = ticks.slice(i, j);

      }

      return ticks;

    };

    scale.tickFormat = function(n, format) {

      if (!arguments.length) return d3_scale_logFormat;

      if (arguments.length < 2) format = d3_scale_logFormat; else if (typeof format !== "function") format = d3.format(format);

      var k = Math.max(.1, n / scale.ticks().length), f = positive ? (e = 1e-12, Math.ceil) : (e = -1e-12,

      Math.floor), e;

      return function(d) {

        return d / pow(f(log(d) + e)) <= k ? format(d) : "";

      };

    };

    scale.copy = function() {

      return d3_scale_log(linear.copy(), base, positive, domain);

    };

    return d3_scale_linearRebind(scale, linear);

  }

  var d3_scale_logFormat = d3.format(".0e"), d3_scale_logNiceNegative = {

    floor: function(x) {

      return -Math.ceil(-x);

    },

    ceil: function(x) {

      return -Math.floor(-x);

    }

  };

  d3.scale.pow = function() {

    return d3_scale_pow(d3.scale.linear(), 1, [ 0, 1 ]);

  };

  function d3_scale_pow(linear, exponent, domain) {

    var powp = d3_scale_powPow(exponent), powb = d3_scale_powPow(1 / exponent);

    function scale(x) {

      return linear(powp(x));

    }

    scale.invert = function(x) {

      return powb(linear.invert(x));

    };

    scale.domain = function(x) {

      if (!arguments.length) return domain;

      linear.domain((domain = x.map(Number)).map(powp));

      return scale;

    };

    scale.ticks = function(m) {

      return d3_scale_linearTicks(domain, m);

    };

    scale.tickFormat = function(m, format) {

      return d3_scale_linearTickFormat(domain, m, format);

    };

    scale.nice = function(m) {

      return scale.domain(d3_scale_linearNice(domain, m));

    };

    scale.exponent = function(x) {

      if (!arguments.length) return exponent;

      powp = d3_scale_powPow(exponent = x);

      powb = d3_scale_powPow(1 / exponent);

      linear.domain(domain.map(powp));

      return scale;

    };

    scale.copy = function() {

      return d3_scale_pow(linear.copy(), exponent, domain);

    };

    return d3_scale_linearRebind(scale, linear);

  }

  function d3_scale_powPow(e) {

    return function(x) {

      return x < 0 ? -Math.pow(-x, e) : Math.pow(x, e);

    };

  }

  d3.scale.sqrt = function() {

    return d3.scale.pow().exponent(.5);

  };

  d3.scale.ordinal = function() {

    return d3_scale_ordinal([], {

      t: "range",

      a: [ [] ]

    });

  };

  function d3_scale_ordinal(domain, ranger) {

    var index, range, rangeBand;

    function scale(x) {

      return range[((index.get(x) || (ranger.t === "range" ? index.set(x, domain.push(x)) : NaN)) - 1) % range.length];

    }

    function steps(start, step) {

      return d3.range(domain.length).map(function(i) {

        return start + step * i;

      });

    }

    scale.domain = function(x) {

      if (!arguments.length) return domain;

      domain = [];

      index = new d3_Map();

      var i = -1, n = x.length, xi;

      while (++i < n) if (!index.has(xi = x[i])) index.set(xi, domain.push(xi));

      return scale[ranger.t].apply(scale, ranger.a);

    };

    scale.range = function(x) {

      if (!arguments.length) return range;

      range = x;

      rangeBand = 0;

      ranger = {

        t: "range",

        a: arguments

      };

      return scale;

    };

    scale.rangePoints = function(x, padding) {

      if (arguments.length < 2) padding = 0;

      var start = x[0], stop = x[1], step = (stop - start) / (Math.max(1, domain.length - 1) + padding);

      range = steps(domain.length < 2 ? (start + stop) / 2 : start + step * padding / 2, step);

      rangeBand = 0;

      ranger = {

        t: "rangePoints",

        a: arguments

      };

      return scale;

    };

    scale.rangeBands = function(x, padding, outerPadding) {

      if (arguments.length < 2) padding = 0;

      if (arguments.length < 3) outerPadding = padding;

      var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = (stop - start) / (domain.length - padding + 2 * outerPadding);

      range = steps(start + step * outerPadding, step);

      if (reverse) range.reverse();

      rangeBand = step * (1 - padding);

      ranger = {

        t: "rangeBands",

        a: arguments

      };

      return scale;

    };

    scale.rangeRoundBands = function(x, padding, outerPadding) {

      if (arguments.length < 2) padding = 0;

      if (arguments.length < 3) outerPadding = padding;

      var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = Math.floor((stop - start) / (domain.length - padding + 2 * outerPadding)), error = stop - start - (domain.length - padding) * step;

      range = steps(start + Math.round(error / 2), step);

      if (reverse) range.reverse();

      rangeBand = Math.round(step * (1 - padding));

      ranger = {

        t: "rangeRoundBands",

        a: arguments

      };

      return scale;

    };

    scale.rangeBand = function() {

      return rangeBand;

    };

    scale.rangeExtent = function() {

      return d3_scaleExtent(ranger.a[0]);

    };

    scale.copy = function() {

      return d3_scale_ordinal(domain, ranger);

    };

    return scale.domain(domain);

  }

  d3.scale.category10 = function() {

    return d3.scale.ordinal().range(d3_category10);

  };

  d3.scale.category20 = function() {

    return d3.scale.ordinal().range(d3_category20);

  };

  d3.scale.category20b = function() {

    return d3.scale.ordinal().range(d3_category20b);

  };

  d3.scale.category20c = function() {

    return d3.scale.ordinal().range(d3_category20c);

  };

  var d3_category10 = [ 2062260, 16744206, 2924588, 14034728, 9725885, 9197131, 14907330, 8355711, 12369186, 1556175 ].map(d3_rgbString);

  var d3_category20 = [ 2062260, 11454440, 16744206, 16759672, 2924588, 10018698, 14034728, 16750742, 9725885, 12955861, 9197131, 12885140, 14907330, 16234194, 8355711, 13092807, 12369186, 14408589, 1556175, 10410725 ].map(d3_rgbString);

  var d3_category20b = [ 3750777, 5395619, 7040719, 10264286, 6519097, 9216594, 11915115, 13556636, 9202993, 12426809, 15186514, 15190932, 8666169, 11356490, 14049643, 15177372, 8077683, 10834324, 13528509, 14589654 ].map(d3_rgbString);

  var d3_category20c = [ 3244733, 7057110, 10406625, 13032431, 15095053, 16616764, 16625259, 16634018, 3253076, 7652470, 10607003, 13101504, 7695281, 10394312, 12369372, 14342891, 6513507, 9868950, 12434877, 14277081 ].map(d3_rgbString);

  d3.scale.quantile = function() {

    return d3_scale_quantile([], []);

  };

  function d3_scale_quantile(domain, range) {

    var thresholds;

    function rescale() {

      var k = 0, q = range.length;

      thresholds = [];

      while (++k < q) thresholds[k - 1] = d3.quantile(domain, k / q);

      return scale;

    }

    function scale(x) {

      if (!isNaN(x = +x)) return range[d3.bisect(thresholds, x)];

    }

    scale.domain = function(x) {

      if (!arguments.length) return domain;

      domain = x.filter(d3_number).sort(d3_ascending);

      return rescale();

    };

    scale.range = function(x) {

      if (!arguments.length) return range;

      range = x;

      return rescale();

    };

    scale.quantiles = function() {

      return thresholds;

    };

    scale.invertExtent = function(y) {

      y = range.indexOf(y);

      return y < 0 ? [ NaN, NaN ] : [ y > 0 ? thresholds[y - 1] : domain[0], y < thresholds.length ? thresholds[y] : domain[domain.length - 1] ];

    };

    scale.copy = function() {

      return d3_scale_quantile(domain, range);

    };

    return rescale();

  }

  d3.scale.quantize = function() {

    return d3_scale_quantize(0, 1, [ 0, 1 ]);

  };

  function d3_scale_quantize(x0, x1, range) {

    var kx, i;

    function scale(x) {

      return range[Math.max(0, Math.min(i, Math.floor(kx * (x - x0))))];

    }

    function rescale() {

      kx = range.length / (x1 - x0);

      i = range.length - 1;

      return scale;

    }

    scale.domain = function(x) {

      if (!arguments.length) return [ x0, x1 ];

      x0 = +x[0];

      x1 = +x[x.length - 1];

      return rescale();

    };

    scale.range = function(x) {

      if (!arguments.length) return range;

      range = x;

      return rescale();

    };

    scale.invertExtent = function(y) {

      y = range.indexOf(y);

      y = y < 0 ? NaN : y / kx + x0;

      return [ y, y + 1 / kx ];

    };

    scale.copy = function() {

      return d3_scale_quantize(x0, x1, range);

    };

    return rescale();

  }

  d3.scale.threshold = function() {

    return d3_scale_threshold([ .5 ], [ 0, 1 ]);

  };

  function d3_scale_threshold(domain, range) {

    function scale(x) {

      if (x <= x) return range[d3.bisect(domain, x)];

    }

    scale.domain = function(_) {

      if (!arguments.length) return domain;

      domain = _;

      return scale;

    };

    scale.range = function(_) {

      if (!arguments.length) return range;

      range = _;

      return scale;

    };

    scale.invertExtent = function(y) {

      y = range.indexOf(y);

      return [ domain[y - 1], domain[y] ];

    };

    scale.copy = function() {

      return d3_scale_threshold(domain, range);

    };

    return scale;

  }

  d3.scale.identity = function() {

    return d3_scale_identity([ 0, 1 ]);

  };

  function d3_scale_identity(domain) {

    function identity(x) {

      return +x;

    }

    identity.invert = identity;

    identity.domain = identity.range = function(x) {

      if (!arguments.length) return domain;

      domain = x.map(identity);

      return identity;

    };

    identity.ticks = function(m) {

      return d3_scale_linearTicks(domain, m);

    };

    identity.tickFormat = function(m, format) {

      return d3_scale_linearTickFormat(domain, m, format);

    };

    identity.copy = function() {

      return d3_scale_identity(domain);

    };

    return identity;

  }

  d3.svg = {};

  d3.svg.arc = function() {

    var innerRadius = d3_svg_arcInnerRadius, outerRadius = d3_svg_arcOuterRadius, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle;

    function arc() {

      var r0 = innerRadius.apply(this, arguments), r1 = outerRadius.apply(this, arguments), a0 = startAngle.apply(this, arguments) + d3_svg_arcOffset, a1 = endAngle.apply(this, arguments) + d3_svg_arcOffset, da = (a1 < a0 && (da = a0,

      a0 = a1, a1 = da), a1 - a0), df = da < ? ? "0" : "1", c0 = Math.cos(a0), s0 = Math.sin(a0), c1 = Math.cos(a1), s1 = Math.sin(a1);

      return da >= d3_svg_arcMax ? r0 ? "M0," + r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + -r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + r1 + "M0," + r0 + "A" + r0 + "," + r0 + " 0 1,0 0," + -r0 + "A" + r0 + "," + r0 + " 0 1,0 0," + r0 + "Z" : "M0," + r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + -r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + r1 + "Z" : r0 ? "M" + r1 * c0 + "," + r1 * s0 + "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1 + "L" + r0 * c1 + "," + r0 * s1 + "A" + r0 + "," + r0 + " 0 " + df + ",0 " + r0 * c0 + "," + r0 * s0 + "Z" : "M" + r1 * c0 + "," + r1 * s0 + "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1 + "L0,0" + "Z";

    }

    arc.innerRadius = function(v) {

      if (!arguments.length) return innerRadius;

      innerRadius = d3_functor(v);

      return arc;

    };

    arc.outerRadius = function(v) {

      if (!arguments.length) return outerRadius;

      outerRadius = d3_functor(v);

      return arc;

    };

    arc.startAngle = function(v) {

      if (!arguments.length) return startAngle;

      startAngle = d3_functor(v);

      return arc;

    };

    arc.endAngle = function(v) {

      if (!arguments.length) return endAngle;

      endAngle = d3_functor(v);

      return arc;

    };

    arc.centroid = function() {

      var r = (innerRadius.apply(this, arguments) + outerRadius.apply(this, arguments)) / 2, a = (startAngle.apply(this, arguments) + endAngle.apply(this, arguments)) / 2 + d3_svg_arcOffset;

      return [ Math.cos(a) * r, Math.sin(a) * r ];

    };

    return arc;

  };

  var d3_svg_arcOffset = -half?, d3_svg_arcMax = ? - ?;

  function d3_svg_arcInnerRadius(d) {

    return d.innerRadius;

  }

  function d3_svg_arcOuterRadius(d) {

    return d.outerRadius;

  }

  function d3_svg_arcStartAngle(d) {

    return d.startAngle;

  }

  function d3_svg_arcEndAngle(d) {

    return d.endAngle;

  }

  function d3_svg_line(projection) {

    var x = d3_geom_pointX, y = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, tension = .7;

    function line(data) {

      var segments = [], points = [], i = -1, n = data.length, d, fx = d3_functor(x), fy = d3_functor(y);

      function segment() {

        segments.push("M", interpolate(projection(points), tension));

      }

      while (++i < n) {

        if (defined.call(this, d = data[i], i)) {

          points.push([ +fx.call(this, d, i), +fy.call(this, d, i) ]);

        } else if (points.length) {

          segment();

          points = [];

        }

      }

      if (points.length) segment();

      return segments.length ? segments.join("") : null;

    }

    line.x = function(_) {

      if (!arguments.length) return x;

      x = _;

      return line;

    };

    line.y = function(_) {

      if (!arguments.length) return y;

      y = _;

      return line;

    };

    line.defined = function(_) {

      if (!arguments.length) return defined;

      defined = _;

      return line;

    };

    line.interpolate = function(_) {

      if (!arguments.length) return interpolateKey;

      if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;

      return line;

    };

    line.tension = function(_) {

      if (!arguments.length) return tension;

      tension = _;

      return line;

    };

    return line;

  }

  d3.svg.line = function() {

    return d3_svg_line(d3_identity);

  };

  var d3_svg_lineInterpolators = d3.map({

    linear: d3_svg_lineLinear,

    "linear-closed": d3_svg_lineLinearClosed,

    step: d3_svg_lineStep,

    "step-before": d3_svg_lineStepBefore,

    "step-after": d3_svg_lineStepAfter,

    basis: d3_svg_lineBasis,

    "basis-open": d3_svg_lineBasisOpen,

    "basis-closed": d3_svg_lineBasisClosed,

    bundle: d3_svg_lineBundle,

    cardinal: d3_svg_lineCardinal,

    "cardinal-open": d3_svg_lineCardinalOpen,

    "cardinal-closed": d3_svg_lineCardinalClosed,

    monotone: d3_svg_lineMonotone

  });

  d3_svg_lineInterpolators.forEach(function(key, value) {

    value.key = key;

    value.closed = /-closed$/.test(key);

  });

  function d3_svg_lineLinear(points) {

    return points.join("L");

  }

  function d3_svg_lineLinearClosed(points) {

    return d3_svg_lineLinear(points) + "Z";

  }

  function d3_svg_lineStep(points) {

    var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];

    while (++i < n) path.push("H", (p[0] + (p = points[i])[0]) / 2, "V", p[1]);

    if (n > 1) path.push("H", p[0]);

    return path.join("");

  }

  function d3_svg_lineStepBefore(points) {

    var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];

    while (++i < n) path.push("V", (p = points[i])[1], "H", p[0]);

    return path.join("");

  }

  function d3_svg_lineStepAfter(points) {

    var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];

    while (++i < n) path.push("H", (p = points[i])[0], "V", p[1]);

    return path.join("");

  }

  function d3_svg_lineCardinalOpen(points, tension) {

    return points.length < 4 ? d3_svg_lineLinear(points) : points[1] + d3_svg_lineHermite(points.slice(1, points.length - 1), d3_svg_lineCardinalTangents(points, tension));

  }

  function d3_svg_lineCardinalClosed(points, tension) {

    return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite((points.push(points[0]),

    points), d3_svg_lineCardinalTangents([ points[points.length - 2] ].concat(points, [ points[1] ]), tension));

  }

  function d3_svg_lineCardinal(points, tension) {

    return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineCardinalTangents(points, tension));

  }

  function d3_svg_lineHermite(points, tangents) {

    if (tangents.length < 1 || points.length != tangents.length && points.length != tangents.length + 2) {

      return d3_svg_lineLinear(points);

    }

    var quad = points.length != tangents.length, path = "", p0 = points[0], p = points[1], t0 = tangents[0], t = t0, pi = 1;

    if (quad) {

      path += "Q" + (p[0] - t0[0] * 2 / 3) + "," + (p[1] - t0[1] * 2 / 3) + "," + p[0] + "," + p[1];

      p0 = points[1];

      pi = 2;

    }

    if (tangents.length > 1) {

      t = tangents[1];

      p = points[pi];

      pi++;

      path += "C" + (p0[0] + t0[0]) + "," + (p0[1] + t0[1]) + "," + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];

      for (var i = 2; i < tangents.length; i++, pi++) {

        p = points[pi];

        t = tangents[i];

        path += "S" + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];

      }

    }

    if (quad) {

      var lp = points[pi];

      path += "Q" + (p[0] + t[0] * 2 / 3) + "," + (p[1] + t[1] * 2 / 3) + "," + lp[0] + "," + lp[1];

    }

    return path;

  }

  function d3_svg_lineCardinalTangents(points, tension) {

    var tangents = [], a = (1 - tension) / 2, p0, p1 = points[0], p2 = points[1], i = 1, n = points.length;

    while (++i < n) {

      p0 = p1;

      p1 = p2;

      p2 = points[i];

      tangents.push([ a * (p2[0] - p0[0]), a * (p2[1] - p0[1]) ]);

    }

    return tangents;

  }

  function d3_svg_lineBasis(points) {

    if (points.length < 3) return d3_svg_lineLinear(points);

    var i = 1, n = points.length, pi = points[0], x0 = pi[0], y0 = pi[1], px = [ x0, x0, x0, (pi = points[1])[0] ], py = [ y0, y0, y0, pi[1] ], path = [ x0, ",", y0, "L", d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];

    points.push(points[n - 1]);

    while (++i <= n) {

      pi = points[i];

      px.shift();

      px.push(pi[0]);

      py.shift();

      py.push(pi[1]);

      d3_svg_lineBasisBezier(path, px, py);

    }

    points.pop();

    path.push("L", pi);

    return path.join("");

  }

  function d3_svg_lineBasisOpen(points) {

    if (points.length < 4) return d3_svg_lineLinear(points);

    var path = [], i = -1, n = points.length, pi, px = [ 0 ], py = [ 0 ];

    while (++i < 3) {

      pi = points[i];

      px.push(pi[0]);

      py.push(pi[1]);

    }

    path.push(d3_svg_lineDot4(d3_svg_lineBasisBezier3, px) + "," + d3_svg_lineDot4(d3_svg_lineBasisBezier3, py));

    --i;

    while (++i < n) {

      pi = points[i];

      px.shift();

      px.push(pi[0]);

      py.shift();

      py.push(pi[1]);

      d3_svg_lineBasisBezier(path, px, py);

    }

    return path.join("");

  }

  function d3_svg_lineBasisClosed(points) {

    var path, i = -1, n = points.length, m = n + 4, pi, px = [], py = [];

    while (++i < 4) {

      pi = points[i % n];

      px.push(pi[0]);

      py.push(pi[1]);

    }

    path = [ d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];

    --i;

    while (++i < m) {

      pi = points[i % n];

      px.shift();

      px.push(pi[0]);

      py.shift();

      py.push(pi[1]);

      d3_svg_lineBasisBezier(path, px, py);

    }

    return path.join("");

  }

  function d3_svg_lineBundle(points, tension) {

    var n = points.length - 1;

    if (n) {

      var x0 = points[0][0], y0 = points[0][1], dx = points[n][0] - x0, dy = points[n][1] - y0, i = -1, p, t;

      while (++i <= n) {

        p = points[i];

        t = i / n;

        p[0] = tension * p[0] + (1 - tension) * (x0 + t * dx);

        p[1] = tension * p[1] + (1 - tension) * (y0 + t * dy);

      }

    }

    return d3_svg_lineBasis(points);

  }

  function d3_svg_lineDot4(a, b) {

    return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];

  }

  var d3_svg_lineBasisBezier1 = [ 0, 2 / 3, 1 / 3, 0 ], d3_svg_lineBasisBezier2 = [ 0, 1 / 3, 2 / 3, 0 ], d3_svg_lineBasisBezier3 = [ 0, 1 / 6, 2 / 3, 1 / 6 ];

  function d3_svg_lineBasisBezier(path, x, y) {

    path.push("C", d3_svg_lineDot4(d3_svg_lineBasisBezier1, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier1, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, y));

  }

  function d3_svg_lineSlope(p0, p1) {

    return (p1[1] - p0[1]) / (p1[0] - p0[0]);

  }

  function d3_svg_lineFiniteDifferences(points) {

    var i = 0, j = points.length - 1, m = [], p0 = points[0], p1 = points[1], d = m[0] = d3_svg_lineSlope(p0, p1);

    while (++i < j) {

      m[i] = (d + (d = d3_svg_lineSlope(p0 = p1, p1 = points[i + 1]))) / 2;

    }

    m[i] = d;

    return m;

  }

  function d3_svg_lineMonotoneTangents(points) {

    var tangents = [], d, a, b, s, m = d3_svg_lineFiniteDifferences(points), i = -1, j = points.length - 1;

    while (++i < j) {

      d = d3_svg_lineSlope(points[i], points[i + 1]);

      if (abs(d) < ?) {

        m[i] = m[i + 1] = 0;

      } else {

        a = m[i] / d;

        b = m[i + 1] / d;

        s = a * a + b * b;

        if (s > 9) {

          s = d * 3 / Math.sqrt(s);

          m[i] = s * a;

          m[i + 1] = s * b;

        }

      }

    }

    i = -1;

    while (++i <= j) {

      s = (points[Math.min(j, i + 1)][0] - points[Math.max(0, i - 1)][0]) / (6 * (1 + m[i] * m[i]));

      tangents.push([ s || 0, m[i] * s || 0 ]);

    }

    return tangents;

  }

  function d3_svg_lineMonotone(points) {

    return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineMonotoneTangents(points));

  }

  d3.svg.line.radial = function() {

    var line = d3_svg_line(d3_svg_lineRadial);

    line.radius = line.x, delete line.x;

    line.angle = line.y, delete line.y;

    return line;

  };

  function d3_svg_lineRadial(points) {

    var point, i = -1, n = points.length, r, a;

    while (++i < n) {

      point = points[i];

      r = point[0];

      a = point[1] + d3_svg_arcOffset;

      point[0] = r * Math.cos(a);

      point[1] = r * Math.sin(a);

    }

    return points;

  }

  function d3_svg_area(projection) {

    var x0 = d3_geom_pointX, x1 = d3_geom_pointX, y0 = 0, y1 = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, interpolateReverse = interpolate, L = "L", tension = .7;

    function area(data) {

      var segments = [], points0 = [], points1 = [], i = -1, n = data.length, d, fx0 = d3_functor(x0), fy0 = d3_functor(y0), fx1 = x0 === x1 ? function() {

        return x;

      } : d3_functor(x1), fy1 = y0 === y1 ? function() {

        return y;

      } : d3_functor(y1), x, y;

      function segment() {

        segments.push("M", interpolate(projection(points1), tension), L, interpolateReverse(projection(points0.reverse()), tension), "Z");

      }

      while (++i < n) {

        if (defined.call(this, d = data[i], i)) {

          points0.push([ x = +fx0.call(this, d, i), y = +fy0.call(this, d, i) ]);

          points1.push([ +fx1.call(this, d, i), +fy1.call(this, d, i) ]);

        } else if (points0.length) {

          segment();

          points0 = [];

          points1 = [];

        }

      }

      if (points0.length) segment();

      return segments.length ? segments.join("") : null;

    }

    area.x = function(_) {

      if (!arguments.length) return x1;

      x0 = x1 = _;

      return area;

    };

    area.x0 = function(_) {

      if (!arguments.length) return x0;

      x0 = _;

      return area;

    };

    area.x1 = function(_) {

      if (!arguments.length) return x1;

      x1 = _;

      return area;

    };

    area.y = function(_) {

      if (!arguments.length) return y1;

      y0 = y1 = _;

      return area;

    };

    area.y0 = function(_) {

      if (!arguments.length) return y0;

      y0 = _;

      return area;

    };

    area.y1 = function(_) {

      if (!arguments.length) return y1;

      y1 = _;

      return area;

    };

    area.defined = function(_) {

      if (!arguments.length) return defined;

      defined = _;

      return area;

    };

    area.interpolate = function(_) {

      if (!arguments.length) return interpolateKey;

      if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;

      interpolateReverse = interpolate.reverse || interpolate;

      L = interpolate.closed ? "M" : "L";

      return area;

    };

    area.tension = function(_) {

      if (!arguments.length) return tension;

      tension = _;

      return area;

    };

    return area;

  }

  d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter;

  d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore;

  d3.svg.area = function() {

    return d3_svg_area(d3_identity);

  };

  d3.svg.area.radial = function() {

    var area = d3_svg_area(d3_svg_lineRadial);

    area.radius = area.x, delete area.x;

    area.innerRadius = area.x0, delete area.x0;

    area.outerRadius = area.x1, delete area.x1;

    area.angle = area.y, delete area.y;

    area.startAngle = area.y0, delete area.y0;

    area.endAngle = area.y1, delete area.y1;

    return area;

  };

  d3.svg.chord = function() {

    var source = d3_source, target = d3_target, radius = d3_svg_chordRadius, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle;

    function chord(d, i) {

      var s = subgroup(this, source, d, i), t = subgroup(this, target, d, i);

      return "M" + s.p0 + arc(s.r, s.p1, s.a1 - s.a0) + (equals(s, t) ? curve(s.r, s.p1, s.r, s.p0) : curve(s.r, s.p1, t.r, t.p0) + arc(t.r, t.p1, t.a1 - t.a0) + curve(t.r, t.p1, s.r, s.p0)) + "Z";

    }

    function subgroup(self, f, d, i) {

      var subgroup = f.call(self, d, i), r = radius.call(self, subgroup, i), a0 = startAngle.call(self, subgroup, i) + d3_svg_arcOffset, a1 = endAngle.call(self, subgroup, i) + d3_svg_arcOffset;

      return {

        r: r,

        a0: a0,

        a1: a1,

        p0: [ r * Math.cos(a0), r * Math.sin(a0) ],

        p1: [ r * Math.cos(a1), r * Math.sin(a1) ]

      };

    }

    function equals(a, b) {

      return a.a0 == b.a0 && a.a1 == b.a1;

    }

    function arc(r, p, a) {

      return "A" + r + "," + r + " 0 " + +(a > ?) + ",1 " + p;

    }

    function curve(r0, p0, r1, p1) {

      return "Q 0,0 " + p1;

    }

    chord.radius = function(v) {

      if (!arguments.length) return radius;

      radius = d3_functor(v);

      return chord;

    };

    chord.source = function(v) {

      if (!arguments.length) return source;

      source = d3_functor(v);

      return chord;

    };

    chord.target = function(v) {

      if (!arguments.length) return target;

      target = d3_functor(v);

      return chord;

    };

    chord.startAngle = function(v) {

      if (!arguments.length) return startAngle;

      startAngle = d3_functor(v);

      return chord;

    };

    chord.endAngle = function(v) {

      if (!arguments.length) return endAngle;

      endAngle = d3_functor(v);

      return chord;

    };

    return chord;

  };

  function d3_svg_chordRadius(d) {

    return d.radius;

  }

  d3.svg.diagonal = function() {

    var source = d3_source, target = d3_target, projection = d3_svg_diagonalProjection;

    function diagonal(d, i) {

      var p0 = source.call(this, d, i), p3 = target.call(this, d, i), m = (p0.y + p3.y) / 2, p = [ p0, {

        x: p0.x,

        y: m

      }, {

        x: p3.x,

        y: m

      }, p3 ];

      p = p.map(projection);

      return "M" + p[0] + "C" + p[1] + " " + p[2] + " " + p[3];

    }

    diagonal.source = function(x) {

      if (!arguments.length) return source;

      source = d3_functor(x);

      return diagonal;

    };

    diagonal.target = function(x) {

      if (!arguments.length) return target;

      target = d3_functor(x);

      return diagonal;

    };

    diagonal.projection = function(x) {

      if (!arguments.length) return projection;

      projection = x;

      return diagonal;

    };

    return diagonal;

  };

  function d3_svg_diagonalProjection(d) {

    return [ d.x, d.y ];

  }

  d3.svg.diagonal.radial = function() {

    var diagonal = d3.svg.diagonal(), projection = d3_svg_diagonalProjection, projection_ = diagonal.projection;

    diagonal.projection = function(x) {

      return arguments.length ? projection_(d3_svg_diagonalRadialProjection(projection = x)) : projection;

    };

    return diagonal;

  };

  function d3_svg_diagonalRadialProjection(projection) {

    return function() {

      var d = projection.apply(this, arguments), r = d[0], a = d[1] + d3_svg_arcOffset;

      return [ r * Math.cos(a), r * Math.sin(a) ];

    };

  }

  d3.svg.symbol = function() {

    var type = d3_svg_symbolType, size = d3_svg_symbolSize;

    function symbol(d, i) {

      return (d3_svg_symbols.get(type.call(this, d, i)) || d3_svg_symbolCircle)(size.call(this, d, i));

    }

    symbol.type = function(x) {

      if (!arguments.length) return type;

      type = d3_functor(x);

      return symbol;

    };

    symbol.size = function(x) {

      if (!arguments.length) return size;

      size = d3_functor(x);

      return symbol;

    };

    return symbol;

  };

  function d3_svg_symbolSize() {

    return 64;

  }

  function d3_svg_symbolType() {

    return "circle";

  }

  function d3_svg_symbolCircle(size) {

    var r = Math.sqrt(size / ?);

    return "M0," + r + "A" + r + "," + r + " 0 1,1 0," + -r + "A" + r + "," + r + " 0 1,1 0," + r + "Z";

  }

  var d3_svg_symbols = d3.map({

    circle: d3_svg_symbolCircle,

    cross: function(size) {

      var r = Math.sqrt(size / 5) / 2;

      return "M" + -3 * r + "," + -r + "H" + -r + "V" + -3 * r + "H" + r + "V" + -r + "H" + 3 * r + "V" + r + "H" + r + "V" + 3 * r + "H" + -r + "V" + r + "H" + -3 * r + "Z";

    },

    diamond: function(size) {

      var ry = Math.sqrt(size / (2 * d3_svg_symbolTan30)), rx = ry * d3_svg_symbolTan30;

      return "M0," + -ry + "L" + rx + ",0" + " 0," + ry + " " + -rx + ",0" + "Z";

    },

    square: function(size) {

      var r = Math.sqrt(size) / 2;

      return "M" + -r + "," + -r + "L" + r + "," + -r + " " + r + "," + r + " " + -r + "," + r + "Z";

    },

    "triangle-down": function(size) {

      var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;

      return "M0," + ry + "L" + rx + "," + -ry + " " + -rx + "," + -ry + "Z";

    },

    "triangle-up": function(size) {

      var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;

      return "M0," + -ry + "L" + rx + "," + ry + " " + -rx + "," + ry + "Z";

    }

  });

  d3.svg.symbolTypes = d3_svg_symbols.keys();

  var d3_svg_symbolSqrt3 = Math.sqrt(3), d3_svg_symbolTan30 = Math.tan(30 * d3_radians);

  function d3_transition(groups, id) {

    d3_subclass(groups, d3_transitionPrototype);

    groups.id = id;

    return groups;

  }

  var d3_transitionPrototype = [], d3_transitionId = 0, d3_transitionInheritId, d3_transitionInherit;

  d3_transitionPrototype.call = d3_selectionPrototype.call;

  d3_transitionPrototype.empty = d3_selectionPrototype.empty;

  d3_transitionPrototype.node = d3_selectionPrototype.node;

  d3_transitionPrototype.size = d3_selectionPrototype.size;

  d3.transition = function(selection) {

    return arguments.length ? d3_transitionInheritId ? selection.transition() : selection : d3_selectionRoot.transition();

  };

  d3.transition.prototype = d3_transitionPrototype;

  d3_transitionPrototype.select = function(selector) {

    var id = this.id, subgroups = [], subgroup, subnode, node;

    selector = d3_selection_selector(selector);

    for (var j = -1, m = this.length; ++j < m; ) {

      subgroups.push(subgroup = []);

      for (var group = this[j], i = -1, n = group.length; ++i < n; ) {

        if ((node = group[i]) && (subnode = selector.call(node, node.__data__, i, j))) {

          if ("__data__" in node) subnode.__data__ = node.__data__;

          d3_transitionNode(subnode, i, id, node.__transition__[id]);

          subgroup.push(subnode);

        } else {

          subgroup.push(null);

        }

      }

    }

    return d3_transition(subgroups, id);

  };

  d3_transitionPrototype.selectAll = function(selector) {

    var id = this.id, subgroups = [], subgroup, subnodes, node, subnode, transition;

    selector = d3_selection_selectorAll(selector);

    for (var j = -1, m = this.length; ++j < m; ) {

      for (var group = this[j], i = -1, n = group.length; ++i < n; ) {

        if (node = group[i]) {

          transition = node.__transition__[id];

          subnodes = selector.call(node, node.__data__, i, j);

          subgroups.push(subgroup = []);

          for (var k = -1, o = subnodes.length; ++k < o; ) {

            if (subnode = subnodes[k]) d3_transitionNode(subnode, k, id, transition);

            subgroup.push(subnode);

          }

        }

      }

    }

    return d3_transition(subgroups, id);

  };

  d3_transitionPrototype.filter = function(filter) {

    var subgroups = [], subgroup, group, node;

    if (typeof filter !== "function") filter = d3_selection_filter(filter);

    for (var j = 0, m = this.length; j < m; j++) {

      subgroups.push(subgroup = []);

      for (var group = this[j], i = 0, n = group.length; i < n; i++) {

        if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {

          subgroup.push(node);

        }

      }

    }

    return d3_transition(subgroups, this.id);

  };

  d3_transitionPrototype.tween = function(name, tween) {

    var id = this.id;

    if (arguments.length < 2) return this.node().__transition__[id].tween.get(name);

    return d3_selection_each(this, tween == null ? function(node) {

      node.__transition__[id].tween.remove(name);

    } : function(node) {

      node.__transition__[id].tween.set(name, tween);

    });

  };

  function d3_transition_tween(groups, name, value, tween) {

    var id = groups.id;

    return d3_selection_each(groups, typeof value === "function" ? function(node, i, j) {

      node.__transition__[id].tween.set(name, tween(value.call(node, node.__data__, i, j)));

    } : (value = tween(value), function(node) {

      node.__transition__[id].tween.set(name, value);

    }));

  }

  d3_transitionPrototype.attr = function(nameNS, value) {

    if (arguments.length < 2) {

      for (value in nameNS) this.attr(value, nameNS[value]);

      return this;

    }

    var interpolate = nameNS == "transform" ? d3_interpolateTransform : d3_interpolate, name = d3.ns.qualify(nameNS);

    function attrNull() {

      this.removeAttribute(name);

    }

    function attrNullNS() {

      this.removeAttributeNS(name.space, name.local);

    }

    function attrTween(b) {

      return b == null ? attrNull : (b += "", function() {

        var a = this.getAttribute(name), i;

        return a !== b && (i = interpolate(a, b), function(t) {

          this.setAttribute(name, i(t));

        });

      });

    }

    function attrTweenNS(b) {

      return b == null ? attrNullNS : (b += "", function() {

        var a = this.getAttributeNS(name.space, name.local), i;

        return a !== b && (i = interpolate(a, b), function(t) {

          this.setAttributeNS(name.space, name.local, i(t));

        });

      });

    }

    return d3_transition_tween(this, "attr." + nameNS, value, name.local ? attrTweenNS : attrTween);

  };

  d3_transitionPrototype.attrTween = function(nameNS, tween) {

    var name = d3.ns.qualify(nameNS);

    function attrTween(d, i) {

      var f = tween.call(this, d, i, this.getAttribute(name));

      return f && function(t) {

        this.setAttribute(name, f(t));

      };

    }

    function attrTweenNS(d, i) {

      var f = tween.call(this, d, i, this.getAttributeNS(name.space, name.local));

      return f && function(t) {

        this.setAttributeNS(name.space, name.local, f(t));

      };

    }

    return this.tween("attr." + nameNS, name.local ? attrTweenNS : attrTween);

  };

  d3_transitionPrototype.style = function(name, value, priority) {

    var n = arguments.length;

    if (n < 3) {

      if (typeof name !== "string") {

        if (n < 2) value = "";

        for (priority in name) this.style(priority, name[priority], value);

        return this;

      }

      priority = "";

    }

    function styleNull() {

      this.style.removeProperty(name);

    }

    function styleString(b) {

      return b == null ? styleNull : (b += "", function() {

        var a = d3_window.getComputedStyle(this, null).getPropertyValue(name), i;

        return a !== b && (i = d3_interpolate(a, b), function(t) {

          this.style.setProperty(name, i(t), priority);

        });

      });

    }

    return d3_transition_tween(this, "style." + name, value, styleString);

  };

  d3_transitionPrototype.styleTween = function(name, tween, priority) {

    if (arguments.length < 3) priority = "";

    function styleTween(d, i) {

      var f = tween.call(this, d, i, d3_window.getComputedStyle(this, null).getPropertyValue(name));

      return f && function(t) {

        this.style.setProperty(name, f(t), priority);

      };

    }

    return this.tween("style." + name, styleTween);

  };

  d3_transitionPrototype.text = function(value) {

    return d3_transition_tween(this, "text", value, d3_transition_text);

  };

  function d3_transition_text(b) {

    if (b == null) b = "";

    return function() {

      this.textContent = b;

    };

  }

  d3_transitionPrototype.remove = function() {

    return this.each("end.transition", function() {

      var p;

      if (this.__transition__.count < 2 && (p = this.parentNode)) p.removeChild(this);

    });

  };

  d3_transitionPrototype.ease = function(value) {

    var id = this.id;

    if (arguments.length < 1) return this.node().__transition__[id].ease;

    if (typeof value !== "function") value = d3.ease.apply(d3, arguments);

    return d3_selection_each(this, function(node) {

      node.__transition__[id].ease = value;

    });

  };

  d3_transitionPrototype.delay = function(value) {

    var id = this.id;

    if (arguments.length < 1) return this.node().__transition__[id].delay;

    return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {

      node.__transition__[id].delay = +value.call(node, node.__data__, i, j);

    } : (value = +value, function(node) {

      node.__transition__[id].delay = value;

    }));

  };

  d3_transitionPrototype.duration = function(value) {

    var id = this.id;

    if (arguments.length < 1) return this.node().__transition__[id].duration;

    return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {

      node.__transition__[id].duration = Math.max(1, value.call(node, node.__data__, i, j));

    } : (value = Math.max(1, value), function(node) {

      node.__transition__[id].duration = value;

    }));

  };

  d3_transitionPrototype.each = function(type, listener) {

    var id = this.id;

    if (arguments.length < 2) {

      var inherit = d3_transitionInherit, inheritId = d3_transitionInheritId;

      d3_transitionInheritId = id;

      d3_selection_each(this, function(node, i, j) {

        d3_transitionInherit = node.__transition__[id];

        type.call(node, node.__data__, i, j);

      });

      d3_transitionInherit = inherit;

      d3_transitionInheritId = inheritId;

    } else {

      d3_selection_each(this, function(node) {

        var transition = node.__transition__[id];

        (transition.event || (transition.event = d3.dispatch("start", "end"))).on(type, listener);

      });

    }

    return this;

  };

  d3_transitionPrototype.transition = function() {

    var id0 = this.id, id1 = ++d3_transitionId, subgroups = [], subgroup, group, node, transition;

    for (var j = 0, m = this.length; j < m; j++) {

      subgroups.push(subgroup = []);

      for (var group = this[j], i = 0, n = group.length; i < n; i++) {

        if (node = group[i]) {

          transition = Object.create(node.__transition__[id0]);

          transition.delay += transition.duration;

          d3_transitionNode(node, i, id1, transition);

        }

        subgroup.push(node);

      }

    }

    return d3_transition(subgroups, id1);

  };

  function d3_transitionNode(node, i, id, inherit) {

    var lock = node.__transition__ || (node.__transition__ = {

      active: 0,

      count: 0

    }), transition = lock[id];

    if (!transition) {

      var time = inherit.time;

      transition = lock[id] = {

        tween: new d3_Map(),

        time: time,

        ease: inherit.ease,

        delay: inherit.delay,

        duration: inherit.duration

      };

      ++lock.count;

      d3.timer(function(elapsed) {

        var d = node.__data__, ease = transition.ease, delay = transition.delay, duration = transition.duration, timer = d3_timer_active, tweened = [];

        timer.t = delay + time;

        if (delay <= elapsed) return start(elapsed - delay);

        timer.c = start;

        function start(elapsed) {

          if (lock.active > id) return stop();

          lock.active = id;

          transition.event && transition.event.start.call(node, d, i);

          transition.tween.forEach(function(key, value) {

            if (value = value.call(node, d, i)) {

              tweened.push(value);

            }

          });

          d3.timer(function() {

            timer.c = tick(elapsed || 1) ? d3_true : tick;

            return 1;

          }, 0, time);

        }

        function tick(elapsed) {

          if (lock.active !== id) return stop();

          var t = elapsed / duration, e = ease(t), n = tweened.length;

          while (n > 0) {

            tweened[--n].call(node, e);

          }

          if (t >= 1) {

            transition.event && transition.event.end.call(node, d, i);

            return stop();

          }

        }

        function stop() {

          if (--lock.count) delete lock[id]; else delete node.__transition__;

          return 1;

        }

      }, 0, time);

    }

  }

  d3.svg.axis = function() {

    var scale = d3.scale.linear(), orient = d3_svg_axisDefaultOrient, innerTickSize = 6, outerTickSize = 6, tickPadding = 3, tickArguments_ = [ 10 ], tickValues = null, tickFormat_;

    function axis(g) {

      g.each(function() {

        var g = d3.select(this);

        var scale0 = this.__chart__ || scale, scale1 = this.__chart__ = scale.copy();

        var ticks = tickValues == null ? scale1.ticks ? scale1.ticks.apply(scale1, tickArguments_) : scale1.domain() : tickValues, tickFormat = tickFormat_ == null ? scale1.tickFormat ? scale1.tickFormat.apply(scale1, tickArguments_) : d3_identity : tickFormat_, tick = g.selectAll(".tick").data(ticks, scale1), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ?), tickExit = d3.transition(tick.exit()).style("opacity", ?).remove(), tickUpdate = d3.transition(tick.order()).style("opacity", 1), tickTransform;

        var range = d3_scaleRange(scale1), path = g.selectAll(".domain").data([ 0 ]), pathUpdate = (path.enter().append("path").attr("class", "domain"),

        d3.transition(path));

        tickEnter.append("line");

        tickEnter.append("text");

        var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text");

        switch (orient) {

         case "bottom":

          {

            tickTransform = d3_svg_axisX;

            lineEnter.attr("y2", innerTickSize);

            textEnter.attr("y", Math.max(innerTickSize, 0) + tickPadding);

            lineUpdate.attr("x2", 0).attr("y2", innerTickSize);

            textUpdate.attr("x", 0).attr("y", Math.max(innerTickSize, 0) + tickPadding);

            text.attr("dy", ".71em").style("text-anchor", "middle");

            pathUpdate.attr("d", "M" + range[0] + "," + outerTickSize + "V0H" + range[1] + "V" + outerTickSize);

            break;

          }



         case "top":

          {

            tickTransform = d3_svg_axisX;

            lineEnter.attr("y2", -innerTickSize);

            textEnter.attr("y", -(Math.max(innerTickSize, 0) + tickPadding));

            lineUpdate.attr("x2", 0).attr("y2", -innerTickSize);

            textUpdate.attr("x", 0).attr("y", -(Math.max(innerTickSize, 0) + tickPadding));

            text.attr("dy", "0em").style("text-anchor", "middle");

            pathUpdate.attr("d", "M" + range[0] + "," + -outerTickSize + "V0H" + range[1] + "V" + -outerTickSize);

            break;

          }



         case "left":

          {

            tickTransform = d3_svg_axisY;

            lineEnter.attr("x2", -innerTickSize);

            textEnter.attr("x", -(Math.max(innerTickSize, 0) + tickPadding));

            lineUpdate.attr("x2", -innerTickSize).attr("y2", 0);

            textUpdate.attr("x", -(Math.max(innerTickSize, 0) + tickPadding)).attr("y", 0);

            text.attr("dy", ".32em").style("text-anchor", "end");

            pathUpdate.attr("d", "M" + -outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + -outerTickSize);

            break;

          }



         case "right":

          {

            tickTransform = d3_svg_axisY;

            lineEnter.attr("x2", innerTickSize);

            textEnter.attr("x", Math.max(innerTickSize, 0) + tickPadding);

            lineUpdate.attr("x2", innerTickSize).attr("y2", 0);

            textUpdate.attr("x", Math.max(innerTickSize, 0) + tickPadding).attr("y", 0);

            text.attr("dy", ".32em").style("text-anchor", "start");

            pathUpdate.attr("d", "M" + outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + outerTickSize);

            break;

          }

        }

        if (scale1.rangeBand) {

          var x = scale1, dx = x.rangeBand() / 2;

          scale0 = scale1 = function(d) {

            return x(d) + dx;

          };

        } else if (scale0.rangeBand) {

          scale0 = scale1;

        } else {

          tickExit.call(tickTransform, scale1);

        }

        tickEnter.call(tickTransform, scale0);

        tickUpdate.call(tickTransform, scale1);

      });

    }

    axis.scale = function(x) {

      if (!arguments.length) return scale;

      scale = x;

      return axis;

    };

    axis.orient = function(x) {

      if (!arguments.length) return orient;

      orient = x in d3_svg_axisOrients ? x + "" : d3_svg_axisDefaultOrient;

      return axis;

    };

    axis.ticks = function() {

      if (!arguments.length) return tickArguments_;

      tickArguments_ = arguments;

      return axis;

    };

    axis.tickValues = function(x) {

      if (!arguments.length) return tickValues;

      tickValues = x;

      return axis;

    };

    axis.tickFormat = function(x) {

      if (!arguments.length) return tickFormat_;

      tickFormat_ = x;

      return axis;

    };

    axis.tickSize = function(x) {

      var n = arguments.length;

      if (!n) return innerTickSize;

      innerTickSize = +x;

      outerTickSize = +arguments[n - 1];

      return axis;

    };

    axis.innerTickSize = function(x) {

      if (!arguments.length) return innerTickSize;

      innerTickSize = +x;

      return axis;

    };

    axis.outerTickSize = function(x) {

      if (!arguments.length) return outerTickSize;

      outerTickSize = +x;

      return axis;

    };

    axis.tickPadding = function(x) {

      if (!arguments.length) return tickPadding;

      tickPadding = +x;

      return axis;

    };

    axis.tickSubdivide = function() {

      return arguments.length && axis;

    };

    return axis;

  };

  var d3_svg_axisDefaultOrient = "bottom", d3_svg_axisOrients = {

    top: 1,

    right: 1,

    bottom: 1,

    left: 1

  };

  function d3_svg_axisX(selection, x) {

    selection.attr("transform", function(d) {

      return "translate(" + x(d) + ",0)";

    });

  }

  function d3_svg_axisY(selection, y) {

    selection.attr("transform", function(d) {

      return "translate(0," + y(d) + ")";

    });

  }

  d3.svg.brush = function() {

    var event = d3_eventDispatch(brush, "brushstart", "brush", "brushend"), x = null, y = null, xExtent = [ 0, 0 ], yExtent = [ 0, 0 ], xExtentDomain, yExtentDomain, xClamp = true, yClamp = true, resizes = d3_svg_brushResizes[0];

    function brush(g) {

      g.each(function() {

        var g = d3.select(this).style("pointer-events", "all").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)").on("mousedown.brush", brushstart).on("touchstart.brush", brushstart);

        var background = g.selectAll(".background").data([ 0 ]);

        background.enter().append("rect").attr("class", "background").style("visibility", "hidden").style("cursor", "crosshair");

        g.selectAll(".extent").data([ 0 ]).enter().append("rect").attr("class", "extent").style("cursor", "move");

        var resize = g.selectAll(".resize").data(resizes, d3_identity);

        resize.exit().remove();

        resize.enter().append("g").attr("class", function(d) {

          return "resize " + d;

        }).style("cursor", function(d) {

          return d3_svg_brushCursor[d];

        }).append("rect").attr("x", function(d) {

          return /[ew]$/.test(d) ? -3 : null;

        }).attr("y", function(d) {

          return /^[ns]/.test(d) ? -3 : null;

        }).attr("width", 6).attr("height", 6).style("visibility", "hidden");

        resize.style("display", brush.empty() ? "none" : null);

        var gUpdate = d3.transition(g), backgroundUpdate = d3.transition(background), range;

        if (x) {

          range = d3_scaleRange(x);

          backgroundUpdate.attr("x", range[0]).attr("width", range[1] - range[0]);

          redrawX(gUpdate);

        }

        if (y) {

          range = d3_scaleRange(y);

          backgroundUpdate.attr("y", range[0]).attr("height", range[1] - range[0]);

          redrawY(gUpdate);

        }

        redraw(gUpdate);

      });

    }

    brush.event = function(g) {

      g.each(function() {

        var event_ = event.of(this, arguments), extent1 = {

          x: xExtent,

          y: yExtent,

          i: xExtentDomain,

          j: yExtentDomain

        }, extent0 = this.__chart__ || extent1;

        this.__chart__ = extent1;

        if (d3_transitionInheritId) {

          d3.select(this).transition().each("start.brush", function() {

            xExtentDomain = extent0.i;

            yExtentDomain = extent0.j;

            xExtent = extent0.x;

            yExtent = extent0.y;

            event_({

              type: "brushstart"

            });

          }).tween("brush:brush", function() {

            var xi = d3_interpolateArray(xExtent, extent1.x), yi = d3_interpolateArray(yExtent, extent1.y);

            xExtentDomain = yExtentDomain = null;

            return function(t) {

              xExtent = extent1.x = xi(t);

              yExtent = extent1.y = yi(t);

              event_({

                type: "brush",

                mode: "resize"

              });

            };

          }).each("end.brush", function() {

            xExtentDomain = extent1.i;

            yExtentDomain = extent1.j;

            event_({

              type: "brush",

              mode: "resize"

            });

            event_({

              type: "brushend"

            });

          });

        } else {

          event_({

            type: "brushstart"

          });

          event_({

            type: "brush",

            mode: "resize"

          });

          event_({

            type: "brushend"

          });

        }

      });

    };

    function redraw(g) {

      g.selectAll(".resize").attr("transform", function(d) {

        return "translate(" + xExtent[+/e$/.test(d)] + "," + yExtent[+/^s/.test(d)] + ")";

      });

    }

    function redrawX(g) {

      g.select(".extent").attr("x", xExtent[0]);

      g.selectAll(".extent,.n>rect,.s>rect").attr("width", xExtent[1] - xExtent[0]);

    }

    function redrawY(g) {

      g.select(".extent").attr("y", yExtent[0]);

      g.selectAll(".extent,.e>rect,.w>rect").attr("height", yExtent[1] - yExtent[0]);

    }

    function brushstart() {

      var target = this, eventTarget = d3.select(d3.event.target), event_ = event.of(target, arguments), g = d3.select(target), resizing = eventTarget.datum(), resizingX = !/^(n|s)$/.test(resizing) && x, resizingY = !/^(e|w)$/.test(resizing) && y, dragging = eventTarget.classed("extent"), dragRestore = d3_event_dragSuppress(), center, origin = d3.mouse(target), offset;

      var w = d3.select(d3_window).on("keydown.brush", keydown).on("keyup.brush", keyup);

      if (d3.event.changedTouches) {

        w.on("touchmove.brush", brushmove).on("touchend.brush", brushend);

      } else {

        w.on("mousemove.brush", brushmove).on("mouseup.brush", brushend);

      }

      g.interrupt().selectAll("*").interrupt();

      if (dragging) {

        origin[0] = xExtent[0] - origin[0];

        origin[1] = yExtent[0] - origin[1];

      } else if (resizing) {

        var ex = +/w$/.test(resizing), ey = +/^n/.test(resizing);

        offset = [ xExtent[1 - ex] - origin[0], yExtent[1 - ey] - origin[1] ];

        origin[0] = xExtent[ex];

        origin[1] = yExtent[ey];

      } else if (d3.event.altKey) center = origin.slice();

      g.style("pointer-events", "none").selectAll(".resize").style("display", null);

      d3.select("body").style("cursor", eventTarget.style("cursor"));

      event_({

        type: "brushstart"

      });

      brushmove();

      function keydown() {

        if (d3.event.keyCode == 32) {

          if (!dragging) {

            center = null;

            origin[0] -= xExtent[1];

            origin[1] -= yExtent[1];

            dragging = 2;

          }

          d3_eventPreventDefault();

        }

      }

      function keyup() {

        if (d3.event.keyCode == 32 && dragging == 2) {

          origin[0] += xExtent[1];

          origin[1] += yExtent[1];

          dragging = 0;

          d3_eventPreventDefault();

        }

      }

      function brushmove() {

        var point = d3.mouse(target), moved = false;

        if (offset) {

          point[0] += offset[0];

          point[1] += offset[1];

        }

        if (!dragging) {

          if (d3.event.altKey) {

            if (!center) center = [ (xExtent[0] + xExtent[1]) / 2, (yExtent[0] + yExtent[1]) / 2 ];

            origin[0] = xExtent[+(point[0] < center[0])];

            origin[1] = yExtent[+(point[1] < center[1])];

          } else center = null;

        }

        if (resizingX && move1(point, x, 0)) {

          redrawX(g);

          moved = true;

        }

        if (resizingY && move1(point, y, 1)) {

          redrawY(g);

          moved = true;

        }

        if (moved) {

          redraw(g);

          event_({

            type: "brush",

            mode: dragging ? "move" : "resize"

          });

        }

      }

      function move1(point, scale, i) {

        var range = d3_scaleRange(scale), r0 = range[0], r1 = range[1], position = origin[i], extent = i ? yExtent : xExtent, size = extent[1] - extent[0], min, max;

        if (dragging) {

          r0 -= position;

          r1 -= size + position;

        }

        min = (i ? yClamp : xClamp) ? Math.max(r0, Math.min(r1, point[i])) : point[i];

        if (dragging) {

          max = (min += position) + size;

        } else {

          if (center) position = Math.max(r0, Math.min(r1, 2 * center[i] - min));

          if (position < min) {

            max = min;

            min = position;

          } else {

            max = position;

          }

        }

        if (extent[0] != min || extent[1] != max) {

          if (i) yExtentDomain = null; else xExtentDomain = null;

          extent[0] = min;

          extent[1] = max;

          return true;

        }

      }

      function brushend() {

        brushmove();

        g.style("pointer-events", "all").selectAll(".resize").style("display", brush.empty() ? "none" : null);

        d3.select("body").style("cursor", null);

        w.on("mousemove.brush", null).on("mouseup.brush", null).on("touchmove.brush", null).on("touchend.brush", null).on("keydown.brush", null).on("keyup.brush", null);

        dragRestore();

        event_({

          type: "brushend"

        });

      }

    }

    brush.x = function(z) {

      if (!arguments.length) return x;

      x = z;

      resizes = d3_svg_brushResizes[!x << 1 | !y];

      return brush;

    };

    brush.y = function(z) {

      if (!arguments.length) return y;

      y = z;

      resizes = d3_svg_brushResizes[!x << 1 | !y];

      return brush;

    };

    brush.clamp = function(z) {

      if (!arguments.length) return x && y ? [ xClamp, yClamp ] : x ? xClamp : y ? yClamp : null;

      if (x && y) xClamp = !!z[0], yClamp = !!z[1]; else if (x) xClamp = !!z; else if (y) yClamp = !!z;

      return brush;

    };

    brush.extent = function(z) {

      var x0, x1, y0, y1, t;

      if (!arguments.length) {

        if (x) {

          if (xExtentDomain) {

            x0 = xExtentDomain[0], x1 = xExtentDomain[1];

          } else {

            x0 = xExtent[0], x1 = xExtent[1];

            if (x.invert) x0 = x.invert(x0), x1 = x.invert(x1);

            if (x1 < x0) t = x0, x0 = x1, x1 = t;

          }

        }

        if (y) {

          if (yExtentDomain) {

            y0 = yExtentDomain[0], y1 = yExtentDomain[1];

          } else {

            y0 = yExtent[0], y1 = yExtent[1];

            if (y.invert) y0 = y.invert(y0), y1 = y.invert(y1);

            if (y1 < y0) t = y0, y0 = y1, y1 = t;

          }

        }

        return x && y ? [ [ x0, y0 ], [ x1, y1 ] ] : x ? [ x0, x1 ] : y && [ y0, y1 ];

      }

      if (x) {

        x0 = z[0], x1 = z[1];

        if (y) x0 = x0[0], x1 = x1[0];

        xExtentDomain = [ x0, x1 ];

        if (x.invert) x0 = x(x0), x1 = x(x1);

        if (x1 < x0) t = x0, x0 = x1, x1 = t;

        if (x0 != xExtent[0] || x1 != xExtent[1]) xExtent = [ x0, x1 ];

      }

      if (y) {

        y0 = z[0], y1 = z[1];

        if (x) y0 = y0[1], y1 = y1[1];

        yExtentDomain = [ y0, y1 ];

        if (y.invert) y0 = y(y0), y1 = y(y1);

        if (y1 < y0) t = y0, y0 = y1, y1 = t;

        if (y0 != yExtent[0] || y1 != yExtent[1]) yExtent = [ y0, y1 ];

      }

      return brush;

    };

    brush.clear = function() {

      if (!brush.empty()) {

        xExtent = [ 0, 0 ], yExtent = [ 0, 0 ];

        xExtentDomain = yExtentDomain = null;

      }

      return brush;

    };

    brush.empty = function() {

      return !!x && xExtent[0] == xExtent[1] || !!y && yExtent[0] == yExtent[1];

    };

    return d3.rebind(brush, event, "on");

  };

  var d3_svg_brushCursor = {

    n: "ns-resize",

    e: "ew-resize",

    s: "ns-resize",

    w: "ew-resize",

    nw: "nwse-resize",

    ne: "nesw-resize",

    se: "nwse-resize",

    sw: "nesw-resize"

  };

  var d3_svg_brushResizes = [ [ "n", "e", "s", "w", "nw", "ne", "se", "sw" ], [ "e", "w" ], [ "n", "s" ], [] ];

  var d3_time_format = d3_time.format = d3_locale_enUS.timeFormat;

  var d3_time_formatUtc = d3_time_format.utc;

  var d3_time_formatIso = d3_time_formatUtc("%Y-%m-%dT%H:%M:%S.%LZ");

  d3_time_format.iso = Date.prototype.toISOString && +new Date("2000-01-01T00:00:00.000Z") ? d3_time_formatIsoNative : d3_time_formatIso;

  function d3_time_formatIsoNative(date) {

    return date.toISOString();

  }

  d3_time_formatIsoNative.parse = function(string) {

    var date = new Date(string);

    return isNaN(date) ? null : date;

  };

  d3_time_formatIsoNative.toString = d3_time_formatIso.toString;

  d3_time.second = d3_time_interval(function(date) {

    return new d3_date(Math.floor(date / 1e3) * 1e3);

  }, function(date, offset) {

    date.setTime(date.getTime() + Math.floor(offset) * 1e3);

  }, function(date) {

    return date.getSeconds();

  });

  d3_time.seconds = d3_time.second.range;

  d3_time.seconds.utc = d3_time.second.utc.range;

  d3_time.minute = d3_time_interval(function(date) {

    return new d3_date(Math.floor(date / 6e4) * 6e4);

  }, function(date, offset) {

    date.setTime(date.getTime() + Math.floor(offset) * 6e4);

  }, function(date) {

    return date.getMinutes();

  });

  d3_time.minutes = d3_time.minute.range;

  d3_time.minutes.utc = d3_time.minute.utc.range;

  d3_time.hour = d3_time_interval(function(date) {

    var timezone = date.getTimezoneOffset() / 60;

    return new d3_date((Math.floor(date / 36e5 - timezone) + timezone) * 36e5);

  }, function(date, offset) {

    date.setTime(date.getTime() + Math.floor(offset) * 36e5);

  }, function(date) {

    return date.getHours();

  });

  d3_time.hours = d3_time.hour.range;

  d3_time.hours.utc = d3_time.hour.utc.range;

  d3_time.month = d3_time_interval(function(date) {

    date = d3_time.day(date);

    date.setDate(1);

    return date;

  }, function(date, offset) {

    date.setMonth(date.getMonth() + offset);

  }, function(date) {

    return date.getMonth();

  });

  d3_time.months = d3_time.month.range;

  d3_time.months.utc = d3_time.month.utc.range;

  function d3_time_scale(linear, methods, format) {

    function scale(x) {

      return linear(x);

    }

    scale.invert = function(x) {

      return d3_time_scaleDate(linear.invert(x));

    };

    scale.domain = function(x) {

      if (!arguments.length) return linear.domain().map(d3_time_scaleDate);

      linear.domain(x);

      return scale;

    };

    function tickMethod(extent, count) {

      var span = extent[1] - extent[0], target = span / count, i = d3.bisect(d3_time_scaleSteps, target);

      return i == d3_time_scaleSteps.length ? [ methods.year, d3_scale_linearTickRange(extent.map(function(d) {

        return d / 31536e6;

      }), count)[2] ] : !i ? [ d3_time_scaleMilliseconds, d3_scale_linearTickRange(extent, count)[2] ] : methods[target / d3_time_scaleSteps[i - 1] < d3_time_scaleSteps[i] / target ? i - 1 : i];

    }

    scale.nice = function(interval, skip) {

      var domain = scale.domain(), extent = d3_scaleExtent(domain), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" && tickMethod(extent, interval);

      if (method) interval = method[0], skip = method[1];

      function skipped(date) {

        return !isNaN(date) && !interval.range(date, d3_time_scaleDate(+date + 1), skip).length;

      }

      return scale.domain(d3_scale_nice(domain, skip > 1 ? {

        floor: function(date) {

          while (skipped(date = interval.floor(date))) date = d3_time_scaleDate(date - 1);

          return date;

        },

        ceil: function(date) {

          while (skipped(date = interval.ceil(date))) date = d3_time_scaleDate(+date + 1);

          return date;

        }

      } : interval));

    };

    scale.ticks = function(interval, skip) {

      var extent = d3_scaleExtent(scale.domain()), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" ? tickMethod(extent, interval) : !interval.range && [ {

        range: interval

      }, skip ];

      if (method) interval = method[0], skip = method[1];

      return interval.range(extent[0], d3_time_scaleDate(+extent[1] + 1), skip < 1 ? 1 : skip);

    };

    scale.tickFormat = function() {

      return format;

    };

    scale.copy = function() {

      return d3_time_scale(linear.copy(), methods, format);

    };

    return d3_scale_linearRebind(scale, linear);

  }

  function d3_time_scaleDate(t) {

    return new Date(t);

  }

  var d3_time_scaleSteps = [ 1e3, 5e3, 15e3, 3e4, 6e4, 3e5, 9e5, 18e5, 36e5, 108e5, 216e5, 432e5, 864e5, 1728e5, 6048e5, 2592e6, 7776e6, 31536e6 ];

  var d3_time_scaleLocalMethods = [ [ d3_time.second, 1 ], [ d3_time.second, 5 ], [ d3_time.second, 15 ], [ d3_time.second, 30 ], [ d3_time.minute, 1 ], [ d3_time.minute, 5 ], [ d3_time.minute, 15 ], [ d3_time.minute, 30 ], [ d3_time.hour, 1 ], [ d3_time.hour, 3 ], [ d3_time.hour, 6 ], [ d3_time.hour, 12 ], [ d3_time.day, 1 ], [ d3_time.day, 2 ], [ d3_time.week, 1 ], [ d3_time.month, 1 ], [ d3_time.month, 3 ], [ d3_time.year, 1 ] ];

  var d3_time_scaleLocalFormat = d3_time_format.multi([ [ ".%L", function(d) {

    return d.getMilliseconds();

  } ], [ ":%S", function(d) {

    return d.getSeconds();

  } ], [ "%I:%M", function(d) {

    return d.getMinutes();

  } ], [ "%I %p", function(d) {

    return d.getHours();

  } ], [ "%a %d", function(d) {

    return d.getDay() && d.getDate() != 1;

  } ], [ "%b %d", function(d) {

    return d.getDate() != 1;

  } ], [ "%B", function(d) {

    return d.getMonth();

  } ], [ "%Y", d3_true ] ]);

  var d3_time_scaleMilliseconds = {

    range: function(start, stop, step) {

      return d3.range(Math.ceil(start / step) * step, +stop, step).map(d3_time_scaleDate);

    },

    floor: d3_identity,

    ceil: d3_identity

  };

  d3_time_scaleLocalMethods.year = d3_time.year;

  d3_time.scale = function() {

    return d3_time_scale(d3.scale.linear(), d3_time_scaleLocalMethods, d3_time_scaleLocalFormat);

  };

  var d3_time_scaleUtcMethods = d3_time_scaleLocalMethods.map(function(m) {

    return [ m[0].utc, m[1] ];

  });

  var d3_time_scaleUtcFormat = d3_time_formatUtc.multi([ [ ".%L", function(d) {

    return d.getUTCMilliseconds();

  } ], [ ":%S", function(d) {

    return d.getUTCSeconds();

  } ], [ "%I:%M", function(d) {

    return d.getUTCMinutes();

  } ], [ "%I %p", function(d) {

    return d.getUTCHours();

  } ], [ "%a %d", function(d) {

    return d.getUTCDay() && d.getUTCDate() != 1;

  } ], [ "%b %d", function(d) {

    return d.getUTCDate() != 1;

  } ], [ "%B", function(d) {

    return d.getUTCMonth();

  } ], [ "%Y", d3_true ] ]);

  d3_time_scaleUtcMethods.year = d3_time.year.utc;

  d3_time.scale.utc = function() {

    return d3_time_scale(d3.scale.linear(), d3_time_scaleUtcMethods, d3_time_scaleUtcFormat);

  };

  d3.text = d3_xhrType(function(request) {

    return request.responseText;

  });

  d3.json = function(url, callback) {

    return d3_xhr(url, "application/json", d3_json, callback);

  };

  function d3_json(request) {

    return JSON.parse(request.responseText);

  }

  d3.html = function(url, callback) {

    return d3_xhr(url, "text/html", d3_html, callback);

  };

  function d3_html(request) {

    var range = d3_document.createRange();

    range.selectNode(d3_document.body);

    return range.createContextualFragment(request.responseText);

  }

  d3.xml = d3_xhrType(function(request) {

    return request.responseXML;

  });

  if (typeof define === "function" && define.amd) {

    define(d3);

  } else if (typeof module === "object" && module.exports) {

    module.exports = d3;

  } else {

    this.d3 = d3;

  }

}();