/*
* The JTS Topology Suite is a collection of Java classes that
* implement the fundamental operations required to validate a given
* geo-spatial data set to a known topological specification.
*
* Copyright (C) 2001 Vivid Solutions
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.revolsys.geometry.algorithm.match;
import com.revolsys.geometry.model.Geometry;
/**
* Measures the degree of similarity between two {@link Geometry}s
* using the area of intersection between the geometries.
* The measure is normalized to lie in the range [0, 1].
* Higher measures indicate a great degree of similarity.
* <p>
* NOTE: Currently experimental and incomplete.
*
* @author mbdavis
*
*/
public class AreaSimilarityMeasure implements SimilarityMeasure {
/*
* public static double measure(Geometry a, Geometry b) { AreaSimilarityMeasure gv = new
* AreaSimilarityMeasure(a, b); return gv.measure(); }
*/
public AreaSimilarityMeasure() {
}
@Override
public double measure(final Geometry g1, final Geometry g2) {
final double areaInt = g1.intersection(g2).getArea();
final double areaUnion = g1.union(g2).getArea();
return areaInt / areaUnion;
}
}