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The NetCDF-Java Library is a Java interface to NetCDF files,
as well as to many other types of scientific data formats.
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/*
* Copyright 1998-2014 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.unidata.geoloc;
import ucar.unidata.geoloc.projection.LatLonProjection;
import ucar.unidata.util.*;
import java.util.*;
/**
* Superclass for our implementations of geoloc.Projection.
*
* All subclasses must:
* - override equals() and return true when all parameters are equal
*
- create "atts" list of parameters as string-valued Attribute pairs
*
- implement abstract methods
*
*
* If possible, set defaultmapArea to some reasonable world coord bounding box
* otherwise, provide a way for the user to specify it when a specific projection
* is created.
*
* Note on "false_easting" and "fale_northing" projection parameters:
*
- false_easting(northing) = The value added to all x (y) values in the rectangular coordinates for a map projection.
* This value frequently is assigned to eliminate negative numbers.
* Expressed in the unit of measure identified in Planar Coordinate Units.
*
- We dont currently use, assuming that the x and y are just fine as negetive numbers.
*
*
* @author John Caron
* @see Projection
*/
public abstract class ProjectionImpl implements Projection, java.io.Serializable {
/**
* Earth radius in kilometers
*/
static public final double EARTH_RADIUS = Earth.getRadius() * 0.001; // km
/**
* Latitude index
*/
public static final int INDEX_LAT = 0;
/**
* Longitude index
*/
public static final int INDEX_LON = 1;
/**
* X index
*/
public static final int INDEX_X = 0;
/**
* Y index
*/
public static final int INDEX_Y = 1;
/**
* tolerence for checks
*/
protected static final double TOLERANCE = 1.0e-6;
/**
* PI
*/
public static final double PI = Math.PI;
/**
* PI/2
*/
public static final double PI_OVER_2 = Math.PI / 2.0;
/**
* PI/4
*/
public static final double PI_OVER_4 = Math.PI / 4.0;
///////////////////////////////////////////////////////////////////////
/**
* name of this projection.
*/
protected String name; // LOOK should be final, IDV needs setName()
/**
* flag for latlon
*/
protected final boolean isLatLon;
/**
* list of attributes
*/
protected final List atts = new ArrayList<>();
/**
* default map area
*/
protected ProjectionRect defaultMapArea = new ProjectionRect();
/**
* copy constructor - avoid clone !!
*
* @return a copy of this Projection
*/
abstract public ProjectionImpl constructCopy();
protected ProjectionImpl(String name, boolean isLatLon) {
this.name = name;
this.isLatLon = isLatLon;
}
/**
* Get the name of the type of the projection.
*
* @return the class name
*/
public String getClassName() {
String className = getClass().getName();
int index = className.lastIndexOf(".");
if (index >= 0) {
className = className.substring(index + 1);
}
return className;
}
/**
* Get a string representation of the projection parameters
*
* @return string representation of the projection parameters
*/
public abstract String paramsToString();
/**
* Get the label to be used in the gui for this type of projection.
* This defaults to call getClassName
*
* @return Type label
*/
public String getProjectionTypeLabel() {
return getClassName();
}
/**
* Convert a LatLonPoint to projection coordinates
*
* @param latlon convert from these lat, lon coordinates
* @param destPoint the object to write to
* @return the given destPoint
*/
public abstract ProjectionPoint latLonToProj(LatLonPoint latlon, ProjectionPointImpl destPoint);
/**
* Convert projection coordinates to a LatLonPoint
* Note: a new object is not created on each call for the return value.
*
* @param ppt convert from these projection coordinates
* @param destPoint the object to write to
* @return LatLonPoint convert to these lat/lon coordinates
*/
public abstract LatLonPoint projToLatLon(ProjectionPoint ppt, LatLonPointImpl destPoint);
/**
* Convert a LatLonPoint to projection coordinates
* Note: a new object is now created on each call for the return value, as of 4.0.46
*
* @param latLon convert from these lat, lon coordinates
* @return ProjectionPoint convert to these projection coordinates
*/
public ProjectionPoint latLonToProj(LatLonPoint latLon) {
return latLonToProj(latLon, new ProjectionPointImpl());
}
/**
* Convert projection coordinates to a LatLonPoint
* Note: a new object is now created on each call for the return value, as of 4.0.46
*
* @param ppt convert from these projection coordinates
* @return LatLonPoint convert to these lat/lon coordinates
*/
public LatLonPoint projToLatLon(ProjectionPoint ppt) {
return projToLatLon(ppt, new LatLonPointImpl());
}
/**
* Does the line between these two points cross the projection "seam".
*
* @param pt1 the line goes between these two points
* @param pt2 the line goes between these two points
* @return false if there is no seam
*/
public abstract boolean crossSeam(ProjectionPoint pt1, ProjectionPoint pt2);
/**
* Returns true if this represents the same Projection as proj.
*
* @param proj projection in question
* @return true if this represents the same Projection as proj.
*/
public abstract boolean equals(Object proj);
/**
* Get the name of this specific projection (also see getClassName)
*
* @return name of the projection
*/
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
/**
* Get parameters as list of ucar.unidata.util.Parameter
*
* @return List of parameters
*/
public List getProjectionParameters() {
return atts;
}
public Parameter findProjectionParameter(String want) {
for (Parameter p : atts) {
if (p.getName().equals(want)) return p;
}
return null;
}
/**
* Add an attribute to this projection
*
* @param name name of the attribute
* @param value attribute value as a string
*/
protected void addParameter(String name, String value) {
atts.add(new Parameter(name, value));
}
/**
* Add an attribute to this projection
*
* @param name name of the attribute
* @param value attribute value as a double
*/
protected void addParameter(String name, double value) {
atts.add(new Parameter(name, value));
}
/**
* Add an attribute to this projection
*
* @param p specify as a Parameter
*/
protected void addParameter(Parameter p) {
atts.add(p);
}
/**
* Is this the lat/lon Projection ?
*
* @return true if it is the lat/lon Projection
*/
public boolean isLatLon() {
return isLatLon;
}
/**
* Get a header for display.
*
* @return human readable header for display
*/
public static String getHeader() {
StringBuilder headerB = new StringBuilder(60);
headerB.append("Name");
Format.tab(headerB, 20, true);
headerB.append("Class");
Format.tab(headerB, 40, true);
headerB.append("Parameters");
return headerB.toString();
}
/**
* Get a String representation of this projection.
*
* @return the name of the projection. This is what gets
* displayed when you add the projection object to
* a UI widget (e.g. label, combobox)
*/
public String toString() {
return getName();
}
/**
* Get a reasonable bounding box for this projection.
*
* @return reasonable bounding box
*/
public ProjectionRect getDefaultMapArea() {
return defaultMapArea;
}
/**
* Get the bounding box in lat/lon.
*
* @return the LatLonRectangle for the bounding box
*/
public LatLonRect getDefaultMapAreaLL() {
return projToLatLonBB(defaultMapArea);
}
/**
* Set a reasonable bounding box for this specific projection.
* Projections are typically specific to an area of the world;
* theres no bounding box that works for all projections.
*
* @param bb bounding box
*/
public void setDefaultMapArea(ProjectionRect bb) {
if (bb == null) return;
defaultMapArea = new ProjectionRect(bb);
}
//////// convenience routines
/**
* Convert a LatLonPoint to projection coordinates
* Note: a new object is now created on each call for the return value, as of 4.0.46
*
* @param lat latitude of point to convert
* @param lon longitude of point to convert
* @return ProjectionPointImpl convert to these projection coordinates
*/
public ProjectionPoint latLonToProj(double lat, double lon) {
return latLonToProj(new LatLonPointImpl(lat, lon));
}
/**
* Convert a projection coordinate to a LatLonPoint
* Note: a new object is now created on each call for the return value, as of 4.0.46
*
* @param x x value to convert
* @param y y value to convert
* @return LatLonPointImpl convert to these lat/lon coordinates
*/
public LatLonPoint projToLatLon(double x, double y) {
return projToLatLon(new ProjectionPointImpl(x, y));
}
///////////////////////////////////////////////////////////////////////////////////
// optimizations for doing double and float arrays
/**
* Convert projection coordinates to lat/lon coordinates.
*
* @param from array of projection coordinates: from[2][n],
* where from[0][i], from[1][i] is the x, y coordinate
* of the ith point
* @return resulting array of lat/lon coordinates, where to[0][i], to[1][i]
* is the lat,lon coordinate of the ith point
*/
public double[][] projToLatLon(double[][] from) {
return projToLatLon(from, new double[2][from[0].length]);
}
/**
* Convert projection coordinates to lat/lon coordinate.
*
* @param from array of projection coordinates: from[2][n], where
* (from[0][i], from[1][i]) is the (x, y) coordinate
* of the ith point
* @param to resulting array of lat/lon coordinates: to[2][n] where
* (to[0][i], to[1][i]) is the (lat, lon) coordinate of
* the ith point
* @return the "to" array
*/
public double[][] projToLatLon(double[][] from, double[][] to) {
if ((from == null) || (from.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "null array argument or wrong dimension (from)");
}
if ((to == null) || (to.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "null array argument or wrong dimension (to)");
}
if (from[0].length != to[0].length) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "from array not same length as to array");
}
for (int i = 0; i < from[0].length; i++) {
LatLonPoint endL = projToLatLon(from[0][i], from[1][i]);
to[0][i] = endL.getLatitude();
to[1][i] = endL.getLongitude();
}
return to;
}
/**
* Convert projection coordinates to lat/lon coordinates.
*
* @param from array of projection coordinates: from[2][n],
* where from[0][i], from[1][i] is the x, y coordinate
* of the ith point
* @return resulting array of lat/lon coordinates, where to[0][i], to[1][i]
* is the lat,lon coordinate of the ith point
*/
public float[][] projToLatLon(float[][] from) {
return projToLatLon(from, new float[2][from[0].length]);
}
/**
* Convert projection coordinates to lat/lon coordinate.
*
* @param from array of projection coordinates: from[2][n], where
* (from[0][i], from[1][i]) is the (x, y) coordinate
* of the ith point
* @param to resulting array of lat/lon coordinates: to[2][n] where
* (to[0][i], to[1][i]) is the (lat, lon) coordinate of
* the ith point
* @return the "to" array
*/
public float[][] projToLatLon(float[][] from, float[][] to) {
if ((from == null) || (from.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "null array argument or wrong dimension (from)");
}
if ((to == null) || (to.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "null array argument or wrong dimension (to)");
}
if (from[0].length != to[0].length) {
throw new IllegalArgumentException("ProjectionImpl.projToLatLon:"
+ "from array not same length as to array");
}
ProjectionPointImpl ppi = new ProjectionPointImpl();
LatLonPointImpl llpi = new LatLonPointImpl();
for (int i = 0; i < from[0].length; i++) {
ppi.setLocation((double) from[0][i], (double) from[1][i]);
projToLatLon(ppi, llpi);
to[0][i] = (float) llpi.getLatitude();
to[1][i] = (float) llpi.getLongitude();
}
return to;
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n],
* where from[0][i], from[1][i] is the (lat,lon)
* coordinate of the ith point
* @return resulting array of projection coordinates, where to[0][i],
* to[1][i] is the (x,y) coordinate of the ith point
*/
public double[][] latLonToProj(double[][] from) {
return latLonToProj(from, new double[2][from[0].length]);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[0][i], from[1][i]) is the (lat,lon) coordinate
* of the ith point
* @param to resulting array of projection coordinates: to[2][n]
* where (to[0][i], to[1][i]) is the (x,y) coordinate
* of the ith point
* @return the "to" array
*/
public double[][] latLonToProj(double[][] from, double[][] to) {
return latLonToProj(from, to, INDEX_LAT, INDEX_LON);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[latIndex][i], from[lonIndex][i]) is the (lat,lon)
* coordinate of the ith point
* @param latIndex index of lat coordinate; must be 0 or 1
* @param lonIndex index of lon coordinate; must be 0 or 1
* @return resulting array of projection coordinates: to[2][n] where
* (to[0][i], to[1][i]) is the (x,y) coordinate of the ith point
*/
public double[][] latLonToProj(double[][] from, int latIndex,
int lonIndex) {
return latLonToProj(from, new double[2][from[0].length], latIndex,
lonIndex);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[latIndex][i], from[lonIndex][i]) is the (lat,lon)
* coordinate of the ith point
* @param to resulting array of projection coordinates: to[2][n]
* where (to[0][i], to[1][i]) is the (x,y) coordinate of
* the ith point
* @param latIndex index of lat coordinate; must be 0 or 1
* @param lonIndex index of lon coordinate; must be 0 or 1
* @return the "to" array
*/
public double[][] latLonToProj(double[][] from, double[][] to,
int latIndex, int lonIndex) {
if ((from == null) || (from.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "null array argument or wrong dimension (from)");
}
if ((to == null) || (to.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "null array argument or wrong dimension (to)");
}
if (from[0].length != to[0].length) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "from array not same length as to array");
}
ProjectionPointImpl ppi = new ProjectionPointImpl();
LatLonPointImpl llpi = new LatLonPointImpl();
for (int i = 0; i < from[0].length; i++) {
llpi.setLatitude(from[latIndex][i]);
llpi.setLongitude(from[lonIndex][i]);
latLonToProj(llpi, ppi);
to[0][i] = ppi.getX();
to[1][i] = ppi.getY();
}
return to;
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n],
* where from[0][i], from[1][i] is the (lat,lon)
* coordinate of the ith point
* @return resulting array of projection coordinates, where to[0][i],
* to[1][i] is the (x,y) coordinate of the ith point
*/
public float[][] latLonToProj(float[][] from) {
return latLonToProj(from, new float[2][from[0].length]);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[0][i], from[1][i]) is the (lat,lon) coordinate
* of the ith point
* @param to resulting array of projection coordinates: to[2][n]
* where (to[0][i], to[1][i]) is the (x,y) coordinate
* of the ith point
* @return the "to" array
*/
public float[][] latLonToProj(float[][] from, float[][] to) {
return latLonToProj(from, to, INDEX_LAT, INDEX_LON);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[latIndex][i], from[lonIndex][i]) is the (lat,lon)
* coordinate of the ith point
* @param latIndex index of lat coordinate; must be 0 or 1
* @param lonIndex index of lon coordinate; must be 0 or 1
* @return resulting array of projection coordinates: to[2][n] where
* (to[0][i], to[1][i]) is the (x,y) coordinate of the ith point
*/
public float[][] latLonToProj(float[][] from, int latIndex,
int lonIndex) {
return latLonToProj(from, new float[2][from[0].length], latIndex,
lonIndex);
}
/**
* Convert lat/lon coordinates to projection coordinates.
*
* @param from array of lat/lon coordinates: from[2][n], where
* (from[latIndex][i], from[lonIndex][i]) is the (lat,lon)
* coordinate of the ith point
* @param to resulting array of projection coordinates: to[2][n]
* where (to[0][i], to[1][i]) is the (x,y) coordinate of
* the ith point
* @param latIndex index of lat coordinate; must be 0 or 1
* @param lonIndex index of lon coordinate; must be 0 or 1
* @return the "to" array
*/
public float[][] latLonToProj(float[][] from, float[][] to, int latIndex,
int lonIndex) {
// ucar.unidata.util.Misc.printStack ("latLonToProj-" + this + " size=" + from[0].length, 4, null);
if ((from == null) || (from.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "null array argument or wrong dimension (from)");
}
if ((to == null) || (to.length != 2)) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "null array argument or wrong dimension (to)");
}
if (from[0].length != to[0].length) {
throw new IllegalArgumentException("ProjectionImpl.latLonToProj:"
+ "from array not same length as to array");
}
ProjectionPointImpl ppi = new ProjectionPointImpl();
LatLonPointImpl llpi = new LatLonPointImpl();
for (int i = 0; i < from[0].length; i++) {
llpi.setLatitude(from[latIndex][i]);
llpi.setLongitude(from[lonIndex][i]);
latLonToProj(llpi, ppi);
to[0][i] = (float) ppi.getX();
to[1][i] = (float) ppi.getY();
}
return to;
}
// bounding box utilities
/**
* Alternate way to calculate latLonToProjBB, originally in GridCoordSys.
* Difficult to do this in a general way.
*
* @param latlonRect desired lat/lon rectangle
* @return a ProjectionRect
*/
ProjectionRect latLonToProjBB2(LatLonRect latlonRect) {
double minx, maxx, miny, maxy;
LatLonPointImpl llpt = latlonRect.getLowerLeftPoint();
LatLonPointImpl urpt = latlonRect.getUpperRightPoint();
LatLonPointImpl lrpt = latlonRect.getLowerRightPoint();
LatLonPointImpl ulpt = latlonRect.getUpperLeftPoint();
if (isLatLon()) {
minx = getMinOrMaxLon(llpt.getLongitude(), ulpt.getLongitude(), true);
miny = Math.min(llpt.getLatitude(), lrpt.getLatitude());
maxx = getMinOrMaxLon(urpt.getLongitude(), lrpt.getLongitude(), false);
maxy = Math.min(ulpt.getLatitude(), urpt.getLatitude());
} else {
ProjectionPoint ll = latLonToProj(llpt, new ProjectionPointImpl());
ProjectionPoint ur = latLonToProj(urpt, new ProjectionPointImpl());
ProjectionPoint lr = latLonToProj(lrpt, new ProjectionPointImpl());
ProjectionPoint ul = latLonToProj(ulpt, new ProjectionPointImpl());
minx = Math.min(ll.getX(), ul.getX());
miny = Math.min(ll.getY(), lr.getY());
maxx = Math.max(ur.getX(), lr.getX());
maxy = Math.max(ul.getY(), ur.getY());
}
return new ProjectionRect(minx, miny, maxx, maxy);
}
private double getMinOrMaxLon(double lon1, double lon2, boolean wantMin) {
double midpoint = (lon1 + lon2) / 2;
lon1 = LatLonPointImpl.lonNormal(lon1, midpoint);
lon2 = LatLonPointImpl.lonNormal(lon2, midpoint);
return wantMin ? Math.min(lon1, lon2) : Math.max(lon1, lon2);
}
/**
* Convert a lat/lon bounding box to a world coordinate bounding box,
* by finding the minimum enclosing box.
* Handles lat/lon points that do not intersect the projection panel.
*
* @param latlonRect input lat,lon bounding box
* @return minimum enclosing box in world coordinates, or null if no part of the LatLonRect intersects the projection plane
*/
public ProjectionRect latLonToProjBB(LatLonRect latlonRect) {
if (isLatLon) {
LatLonProjection llp = (LatLonProjection) this;
llp.setCenterLon(latlonRect.getCenterLon()); // LOOK side effect BAD !!
}
ProjectionPointImpl w1 = new ProjectionPointImpl();
ProjectionPointImpl w2 = new ProjectionPointImpl();
LatLonPoint ll = latlonRect.getLowerLeftPoint();
LatLonPoint ur = latlonRect.getUpperRightPoint();
latLonToProj(ll, w1);
latLonToProj(ur, w2);
//if (!isLatLon && crossSeam(w1, w2)) {
// log.warn("CROSS SEAM failure=" + w1 + " " + w2+" for "+this, new Throwable());
//}
// make bounding box out of those two corners
ProjectionRect world = new ProjectionRect(w1.getX(), w1.getY(), w2.getX(), w2.getY());
LatLonPointImpl la = new LatLonPointImpl();
LatLonPointImpl lb = new LatLonPointImpl();
// now extend if needed to the other two corners
la.setLatitude(ur.getLatitude());
la.setLongitude(ll.getLongitude());
latLonToProj(la, w1);
world.add(w1);
lb.setLatitude(ll.getLatitude());
lb.setLongitude(ur.getLongitude());
latLonToProj(lb, w2);
world.add(w2);
return world;
}
/**
* Convert a world coordinate bounding box to a lat/lon bounding box,
* by finding the minimum enclosing box.
*
* @param world input world coordinate bounding box
* @return minimum enclosing box in lat,lon coordinates.
*/
public LatLonRect projToLatLonBBold(ProjectionRect world) {
//System.out.println("world = " + world);
ProjectionPoint min = world.getMinPoint();
ProjectionPoint max = world.getMaxPoint();
//System.out.println("min = " + min);
//System.out.println("max = " + max);
LatLonRect llbb;
LatLonPointImpl llmin = new LatLonPointImpl();
LatLonPointImpl llmax = new LatLonPointImpl();
// make bounding box out of the min, max corners
projToLatLon(min, llmin);
projToLatLon(max, llmax);
llbb = new LatLonRect(llmin, llmax);
//System.out.println("llbb = " + llbb);
/*
double lona = la.getLongitude();
double lonb = lb.getLongitude();
if (((lona < lonb) && (lonb - lona <= 180.0))
|| ((lona > lonb) && (lona - lonb >= 180.0))) {
llbb = new LatLonRect(la, lb);
} else {
llbb = new LatLonRect(lb, la);
} */
ProjectionPointImpl w1 = new ProjectionPointImpl();
ProjectionPointImpl w2 = new ProjectionPointImpl();
// now extend if needed using the other two corners
w1.setLocation(min.getX(), max.getY());
projToLatLon(w1, llmin);
llbb.extend(llmin);
w2.setLocation(max.getX(), min.getY());
projToLatLon(w2, llmax);
llbb.extend(llmax);
return llbb;
}
/**
* Compute lat/lon bounding box from projection bounding box by finding the minimum enclosing box.
* @param bb projection bounding box
* @return lat, lon bounding box.
*/
public LatLonRect projToLatLonBB(ProjectionRect bb) {
// look at all 4 corners of the bounding box
LatLonPoint llpt = projToLatLon(bb.getLowerLeftPoint(), new LatLonPointImpl());
LatLonPoint lrpt = projToLatLon(bb.getLowerRightPoint(), new LatLonPointImpl());
LatLonPoint urpt = projToLatLon(bb.getUpperRightPoint(), new LatLonPointImpl());
LatLonPoint ulpt = projToLatLon(bb.getUpperLeftPoint(), new LatLonPointImpl());
// Check if grid contains poles.
boolean includesNorthPole = false;
/* int[] resultNP;
findXYindexFromLatLon(90.0, 0, resultNP);
if (resultNP[0] != -1 && resultNP[1] != -1)
includesNorthPole = true; */
boolean includesSouthPole = false;
/* int[] resultSP = new int[2];
findXYindexFromLatLon(-90.0, 0, resultSP);
if (resultSP[0] != -1 && resultSP[1] != -1)
includesSouthPole = true; */
LatLonRect llbb;
if (includesNorthPole && !includesSouthPole) {
llbb = new LatLonRect(llpt, new LatLonPointImpl(90.0, 0.0)); // ??? lon=???
llbb.extend(lrpt);
llbb.extend(urpt);
llbb.extend(ulpt);
// OR
//llbb.extend( new LatLonRect( llpt, lrpt ));
//llbb.extend( new LatLonRect( lrpt, urpt ) );
//llbb.extend( new LatLonRect( urpt, ulpt ) );
//llbb.extend( new LatLonRect( ulpt, llpt ) );
} else if (includesSouthPole && !includesNorthPole) {
llbb = new LatLonRect(llpt, new LatLonPointImpl(-90.0, -180.0)); // ??? lon=???
llbb.extend(lrpt);
llbb.extend(urpt);
llbb.extend(ulpt);
} else {
double latMin = Math.min(llpt.getLatitude(), lrpt.getLatitude());
double latMax = Math.max(ulpt.getLatitude(), urpt.getLatitude());
// longitude is a bit tricky as usual
double lonMin = getMinOrMaxLon(llpt.getLongitude(), ulpt.getLongitude(), true);
double lonMax = getMinOrMaxLon(lrpt.getLongitude(), urpt.getLongitude(), false);
LatLonPointImpl min = new LatLonPointImpl(latMin, lonMin);
LatLonPointImpl max = new LatLonPointImpl(latMax, lonMax);
llbb = new LatLonRect(min, max);
}
return llbb;
}
}
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