source: josm/src/org/openstreetmap/josm/data/projection/Mercator.java@ 36

package org.openstreetmap.josm.data.projection;

import javax.swing.JComponent;

import org.openstreetmap.josm.data.GeoPoint;

/**
 * Implement Mercator Projection code, coded after documentation
 * from wikipedia.
 * 
 * The center of the mercator projection is always the 0° 
 * coordinate.
 * 
 * @author imi
 */
public class Mercator extends Projection {

        @Override
        public void latlon2xy(GeoPoint p) {
                p.x = p.lon*Math.PI/180;
                p.y = Math.log(Math.tan(Math.PI/4+p.lat*Math.PI/360));
        }

        @Override
        public void xy2latlon(GeoPoint p) {
                p.lon = p.x*180/Math.PI;
                p.lat = Math.atan(Math.sinh(p.y))*180/Math.PI;
        }

        @Override
        public String toString() {
                return "Mercator";
        }

        @Override
        public JComponent getConfigurationPanel() {
                return null;
        }

        @Override
        public void commitConfigurationPanel() {
        }
}