source: josm/src/org/openstreetmap/josm/data/Bounds.java@ 9

package org.openstreetmap.josm.data;

/**
 * This is a simple data class for "rectangular" areas of the world, given in lat/lon/min/max
 * values.
 * 
 * Do not confuse this with "Area", which is an OSM-primitive for a vector of nodes, 
 * describing some area (like a sea).
 * 
 * @author imi
 */
public class Bounds {
        /**
         * The minimum and maximum coordinates.
         */
        public GeoPoint min, max;

        /**
         * Return the center point based on the lat/lon values.
         *
         * @return The center of these bounds.
         */
        public GeoPoint centerLatLon() {
                GeoPoint p = new GeoPoint((min.lat+max.lat) / 2, (min.lon+max.lon) / 2);
                return p;
        }

        /**
         * Return the center point based on the x/y values.
         *
         * @return The center of these bounds.
         */
        public GeoPoint centerXY() {
                GeoPoint p = new GeoPoint();
                p.x = (min.x+max.x) / 2;
                p.y = (min.y+max.y) / 2;
                return p;
        }
        
        /**
         * Construct bounds out of two geopoints
         */
        public Bounds(GeoPoint min, GeoPoint max) {
                this.min = min;
                this.max = max;
        }
}