Class AreaSimilarityMeasure

1	/*
2	* Copyright (c) 2016 Vivid Solutions.
3	*
4	* All rights reserved. This program and the accompanying materials
5	* are made available under the terms of the Eclipse Public License 2.0
6	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
7	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
8	* and the Eclipse Distribution License is available at
9	*
10	* http://www.eclipse.org/org/documents/edl-v10.php.
11	*/
12
13	package org.locationtech.jts.algorithm.match;
14
15	import org.locationtech.jts.geom.Geometry;
16
17	/**
18	* Measures the degree of similarity between two {@link Geometry}s
19	* using the area of intersection between the geometries.
20	* The measure is normalized to lie in the range [0, 1].
21	* Higher measures indicate a great degree of similarity.
22	* <p>
23	* NOTE: Currently experimental and incomplete.
24	*
25	* @author mbdavis
26	*
27	*/
28	public class AreaSimilarityMeasure
29	implements SimilarityMeasure
30	{
31	/*
32	public static double measure(Geometry a, Geometry b)
33	{
34	AreaSimilarityMeasure gv = new AreaSimilarityMeasure(a, b);
35	return gv.measure();
36	}
37	*/
38
39	/**
40	* Creates a new instance.
41	*/
42	public AreaSimilarityMeasure()
43	{
44	}
45
46	public double measure(Geometry g1, Geometry g2)
47	{
48	double areaInt = g1.intersection(g2).getArea();
49	double areaUnion = g1.union(g2).getArea();
50	return areaInt / areaUnion;
51	}
52
53
54	}
55