source: josm/trunk/src/org/openstreetmap/josm/data/projection/Puwg.java@ 5237

// License: GPL. Copyright 2007 by Immanuel Scholz and others
//                         2009 by Łukasz Stelmach
package org.openstreetmap.josm.data.projection;

import static org.openstreetmap.josm.tools.I18n.tr;

import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.coor.LatLon;
import org.openstreetmap.josm.data.projection.datum.GRS80Datum;
import org.openstreetmap.josm.data.projection.proj.ProjParameters;

/**
 * PUWG 1992 and 2000 are the official cordinate systems in Poland.
 * They use the same math as UTM only with different constants.
 *
 * @author steelman
 */
public class Puwg extends AbstractProjection {

    public static final int DEFAULT_ZONE = 0;

    private final int zone;

    static public PuwgData[] zones = new PuwgData[] {
        new Epsg2180(),
        new Epsg2176(),
        new Epsg2177(),
        new Epsg2178(),
        new Epsg2179()
    };

    public Puwg() {
        this(DEFAULT_ZONE);
    }

    public Puwg(int zone) {
        if (zone < 0 || zone >= zones.length)
            throw new IllegalArgumentException();
        ellps = Ellipsoid.GRS80;
        proj = new org.openstreetmap.josm.data.projection.proj.TransverseMercator();
        try {
            proj.initialize(new ProjParameters() {{ ellps = Puwg.this.ellps; }});
        } catch (ProjectionConfigurationException e) {
            throw new RuntimeException(e);
        }
        datum = GRS80Datum.INSTANCE;
        this.zone = zone;
        PuwgData z = zones[zone];
        x_0 = z.getPuwgFalseEasting();
        y_0 = z.getPuwgFalseNorthing();
        lon_0 = z.getPuwgCentralMeridianDeg();
        k_0 = z.getPuwgScaleFactor();
    }

    @Override
    public String toString() {
        return tr("PUWG (Poland)");
    }

    @Override
    public Integer getEpsgCode() {
        return zones[zone].getEpsgCode();
    }

    @Override
    public int hashCode() {
        return getClass().getName().hashCode()+zone; // our only real variable
    }

    @Override
    public String getCacheDirectoryName() {
        return zones[zone].getCacheDirectoryName();
    }

    @Override
    public Bounds getWorldBoundsLatLon() {
        return zones[zone].getWorldBoundsLatLon();
    }

    public interface PuwgData {
        double getPuwgCentralMeridianDeg();
        double getPuwgCentralMeridian();
        double getPuwgFalseEasting();
        double getPuwgFalseNorthing();
        double getPuwgScaleFactor();

        // Projection methods
        Integer getEpsgCode();
        String toCode();
        String getCacheDirectoryName();
        Bounds getWorldBoundsLatLon();
    }

    public static class Epsg2180 implements PuwgData {

        private static final double Epsg2180FalseEasting = 500000.0; /* y */
        private static final double Epsg2180FalseNorthing = -5300000.0; /* x */
        private static final double Epsg2180ScaleFactor = 0.9993;
        private static final double Epsg2180CentralMeridian = 19.0;

        @Override public String toString() {
            return tr("PUWG 1992 (Poland)");
        }

        @Override
        public Integer getEpsgCode() {
            return 2180;
        }

        @Override
        public String toCode() {
            return "EPSG:" + getEpsgCode();
        }

        @Override
        public String getCacheDirectoryName() {
            return "epsg2180";
        }

        @Override
        public Bounds getWorldBoundsLatLon()
        {
            return new Bounds(
                    new LatLon(49.00, 14.12),
                    new LatLon(54.84, 24.15), false);
        }

        @Override public double getPuwgCentralMeridianDeg() { return Epsg2180CentralMeridian; }
        @Override public double getPuwgCentralMeridian() { return Math.toRadians(Epsg2180CentralMeridian); }
        @Override public double getPuwgFalseEasting() { return Epsg2180FalseEasting; }
        @Override public double getPuwgFalseNorthing() { return Epsg2180FalseNorthing; }
        @Override public double getPuwgScaleFactor() { return Epsg2180ScaleFactor; }
    }

    abstract static class Puwg2000 implements PuwgData {

        private static final double PuwgFalseEasting = 500000.0;
        private static final double PuwgFalseNorthing = 0;
        private static final double PuwgScaleFactor = 0.999923;
        //final private double[] Puwg2000CentralMeridian = {15.0, 18.0, 21.0, 24.0};
        final private Integer[] Puwg2000Code = { 2176,  2177, 2178, 2179 };
        final private String[] Puwg2000CDName = { "epsg2176",  "epsg2177", "epsg2178", "epsg2179" };

        @Override public String toString() {
            return tr("PUWG 2000 Zone {0} (Poland)", Integer.toString(getZone()));
        }

        @Override
        public Integer getEpsgCode() {
            return Puwg2000Code[getZoneIndex()];
        }

        @Override
        public String toCode() {
            return "EPSG:" + getEpsgCode();
        }

        @Override
        public String getCacheDirectoryName() {
            return Puwg2000CDName[getZoneIndex()];
        }

        @Override
        public Bounds getWorldBoundsLatLon()
        {
            return new Bounds(
                    new LatLon(49.00, (3 * getZone()) - 1.5),
                    new LatLon(54.84, (3 * getZone()) + 1.5), false);
        }

        @Override public double getPuwgCentralMeridianDeg() { return getZone() * 3.0; }
        @Override public double getPuwgCentralMeridian() { return Math.toRadians(getZone() * 3.0); }
        @Override public double getPuwgFalseNorthing() { return PuwgFalseNorthing;}
        @Override public double getPuwgFalseEasting() { return 1e6 * getZone() + PuwgFalseEasting; }
        @Override public double getPuwgScaleFactor() { return PuwgScaleFactor; }
        public abstract int getZone();

        public int getZoneIndex() { return getZone() - 5; }

    }

    public static class Epsg2176 extends Puwg2000 {
        private static final int PuwgZone = 5;

        @Override
        public int getZone() { return PuwgZone; }
    }

    public static class Epsg2177 extends Puwg2000 {
        private static final int PuwgZone = 6;

        @Override
        public int getZone() { return PuwgZone; }
    }

    public static class Epsg2178 extends Puwg2000 {
        private static final int PuwgZone = 7;

        @Override
        public int getZone() { return PuwgZone; }
    }

    public static class Epsg2179 extends Puwg2000 {
        private static final int PuwgZone = 8;

        @Override
        public int getZone() { return PuwgZone; }
    }
}