source: josm/src/org/openstreetmap/josm/data/GeoPoint.java@ 2

package org.openstreetmap.josm.data;

/**
 * An point holding latitude/longitude and their corresponding north/east values, 
 * which may not be initialized.
 *
 * if x or y is "NaN", these are not initialized yet.
 *
 * @author imi
 */
public class GeoPoint implements Cloneable {

        /**
         * Latitude/Longitude coordinates.
         */
        public double lat = Double.NaN, lon = Double.NaN;

        /**
         * East/North coordinates;
         */
        public double x = Double.NaN, y = Double.NaN;

        /**
         * Construct the point with latitude / longitude values.
         * The x/y values are left uninitialized.
         * 
         * @param lat Latitude of the point.
         * @param lon Longitude of the point.
         */
        public GeoPoint(double lat, double lon) {
                this.lat = lat;
                this.lon = lon;
        }

        /**
         * Construct the point with all values unset (set to NaN)
         */
        public GeoPoint() {
        }

        @Override
        public GeoPoint clone() {
                try {return (GeoPoint)super.clone();} catch (CloneNotSupportedException e) {}
                return null;
        }
}