UTMGCT.java

//**********************************************************************
//
//<copyright>
//
//BBN Technologies
//10 Moulton Street
//Cambridge, MA 02138
//(617) 873-8000
//
//Copyright (C) BBNT Solutions LLC. All rights reserved.
//
//</copyright>
//**********************************************************************
//
//$Source:
///cvs/darwars/ambush/aar/src/com/bbn/ambush/mission/MissionHandler.java,v
//$
//$RCSfile: UTMGCT.java,v $
//$Revision: 1.3 $
//$Date: 2008/09/19 14:20:14 $
//$Author: dietrick $
//
//**********************************************************************

package com.bbn.openmap.proj.coords;

import java.awt.geom.Point2D;
import java.util.Properties;

import com.bbn.openmap.proj.Ellipsoid;
import com.bbn.openmap.util.PropUtils;

public class UTMGCT extends AbstractGCT implements GeoCoordTransformation {

    public final static String ZoneProperty = "zone";
    public final static String HemiProperty = "hemi";
    public final static String ElliposoidProperty = "ellipsoid";

    protected Ellipsoid ellipsoid = Ellipsoid.WGS_84;

    protected LatLonPoint tmpLL = new LatLonPoint.Double();
    protected UTMPoint tmpUTM = new UTMPoint();

    protected int zone_number;
    protected char zone_letter;

    /**
     * Make sure you call setProperties() or set the UTM before trying to use
     * this object.
     * 
     */
    public UTMGCT() {}

    public UTMGCT(int zone_number, char zone_letter) {
        this.zone_number = zone_number;
        this.zone_letter = zone_letter;
    }

    public UTMGCT(UTMPoint utmPoint) {
        setUtm(utmPoint);
    }

    public UTMPoint getUtm() {
        return tmpUTM;
    }

    public void setUtm(UTMPoint utm) {
        this.tmpUTM = utm;
        this.zone_number = utm.zone_number;
        this.zone_letter = utm.zone_letter;
    }

    public synchronized Point2D forward(double lat, double lon, Point2D ret) {
        tmpLL.setLatLon(lat, lon);
        UTMPoint.LLtoUTM(tmpLL, ellipsoid, tmpUTM, zone_number, zone_letter == 'N');
        ret.setLocation(tmpUTM.easting, tmpUTM.northing);
        return ret;
    }

    public LatLonPoint inverse(double x, double y, LatLonPoint ret) {
        UTMPoint.UTMtoLL(ellipsoid, y, x, zone_number, zone_letter, ret);
        return ret;
    }

    public void setProperties(String propertyPrefix, Properties props) {
        super.setProperties(propertyPrefix, props);

        propertyPrefix = PropUtils.getScopedPropertyPrefix(propertyPrefix);
        zone_number = PropUtils.intFromProperties(props, propertyPrefix
                + ZoneProperty, 0);

        String hString = props.getProperty(propertyPrefix + HemiProperty, "N");
        zone_letter = hString.charAt(0);

        String eName = props.getProperty(propertyPrefix + ElliposoidProperty,
                "WGS_84");
        ellipsoid = Ellipsoid.getByName(eName);
    }

    public Properties getProperties(Properties props) {
        props = super.getProperties(props);
        String prefix = PropUtils.getScopedPropertyPrefix(this);

        props.put(prefix + ZoneProperty, Integer.toString(zone_number));
        props.put(prefix + HemiProperty, Character.toString(zone_letter));
        props.put(prefix + ElliposoidProperty, ellipsoid.name.toUpperCase()
                .replace(' ', '_'));
        return props;
    }

    public Properties getPropertyInfo(Properties props) {
        props = super.getPropertyInfo(props);
        return props;
    }

    public Ellipsoid getEllipsoid() {
        return ellipsoid;
    }

    public void setEllipsoid(Ellipsoid ellipsoid) {
        this.ellipsoid = ellipsoid;
    }
}