org.jxmapviewer.viewer.esri.ESRITileFactory Maven / Gradle / Ivy

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/*
 * ESRITileFactory.java
 *
 * Created on November 7, 2006, 10:51 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.jxmapviewer.viewer.esri;

import java.awt.geom.Point2D;
import java.math.BigDecimal;
import java.math.RoundingMode;

import org.jxmapviewer.viewer.DefaultTileFactory;
import org.jxmapviewer.viewer.GeoPosition;
import org.jxmapviewer.viewer.TileFactoryInfo;
import org.jxmapviewer.viewer.util.GeoUtil;

/**
 * @author rbair
 */
public class ESRITileFactory extends DefaultTileFactory
{
    private static final String projection = "8"; // mercator projection
    private static final String format = "png"; // get pngs back
    private String userId;
    private String datasource; // should be enum

    /** Creates a new instance of ESRITileFactory */
    public ESRITileFactory()
    {
        super(new ESRITileProviderInfo());
        ((ESRITileProviderInfo) super.getInfo()).factory = this;
        datasource = "ArcWeb:TA.Streets.NA";
    }

    /**
     * @param id the ESRI user id
     */
    public void setUserID(String id)
    {
        this.userId = id;
    }

    private static final class ESRITileProviderInfo extends TileFactoryInfo
    {
        private ESRITileFactory factory;

        private ESRITileProviderInfo()
        {
            super(0, 17, 18, 256, false, true, "http://www.arcwebservices.com/services/v2006/restmap?actn=getMap", "","", "");
        }

        @Override
        public String getTileUrl(int x, int y, int zoom)
        {
            // "&usrid=&ds=&c=-117.1817|34.0556&sf=52500&fmt=&ocs=";
            // System.out.println("getting tile at zoom: " + zoom);
            // System.out.println("map width at zoom = " + getMapWidthInTilesAtZoom(zoom));

            // provide the center point of the tile, in lat/long coords
            int tileY = y;
            int tileX = x;
            int pixelX = tileX * factory.getTileSize(zoom) + (factory.getTileSize(zoom) / 2);
            int pixelY = tileY * factory.getTileSize(zoom) + (factory.getTileSize(zoom) / 2);

            GeoPosition latlong = GeoUtil.getPosition(new Point2D.Double(pixelX, pixelY), zoom, this);

            // Chris is going to hate me for this (relying on 72dpi!), but:
            // 72 pixels per inch. The earth is 24,859.82 miles in circumference, at the equator.
            // Thus, the earth is 24,859.82 * 5280 * 12 * 72 pixels in circumference.

            double numFeetPerDegreeLong = 24859.82 * 5280 / 360; // the number of feet per degree longitude at the
                                                                    // equator
            double numPixelsPerDegreeLong = getLongitudeDegreeWidthInPixels(zoom);
            double numPixelsPerFoot = 96 * 12;
            int sf = (int) (numFeetPerDegreeLong / (numPixelsPerDegreeLong / numPixelsPerFoot));

            // round lat and long to 5 decimal places
            BigDecimal lat = new BigDecimal(latlong.getLatitude());
            BigDecimal lon = new BigDecimal(latlong.getLongitude());
            lat = lat.setScale(5, RoundingMode.DOWN);
            lon = lon.setScale(5, RoundingMode.DOWN);
            System.out.println("Tile      : [" + tileX + ", " + tileY + "]");
            System.out.println("Pixel     : [" + pixelX + ", " + pixelY + "]");
            System.out.println("Lat/Long  : [" + latlong.getLatitude() + ", " + latlong.getLongitude() + "]");
            System.out.println("Lat2/Long2: [" + lat.doubleValue() + ", " + lon.doubleValue() + "]");

            String url = baseURL + "&usrid=" + factory.userId + "&ds=" + factory.datasource + "&c=" + lon.doubleValue()
                    + "%7C" + lat.doubleValue() + "&sf=" + sf + // 52500" +
                    "&fmt=" + format + "&ocs=" + projection;
            System.out.println("the URL: " + url);
            return url;
        }
    }
}