01: /*
02: * The JTS Topology Suite is a collection of Java classes that
03: * implement the fundamental operations required to validate a given
04: * geo-spatial data set to a known topological specification.
05: *
06: * Copyright (C) 2001 Vivid Solutions
07: *
08: * This library is free software; you can redistribute it and/or
09: * modify it under the terms of the GNU Lesser General Public
10: * License as published by the Free Software Foundation; either
11: * version 2.1 of the License, or (at your option) any later version.
12: *
13: * This library is distributed in the hope that it will be useful,
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16: * Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public
19: * License along with this library; if not, write to the Free Software
20: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: *
22: * For more information, contact:
23: *
24: * Vivid Solutions
25: * Suite #1A
26: * 2328 Government Street
27: * Victoria BC V8T 5G5
28: * Canada
29: *
30: * (250)385-6040
31: * www.vividsolutions.com
32: */
33: package com.vividsolutions.jtsexample.operation.polygonize;
34:
35: import java.util.ArrayList;
36: import java.util.Collection;
37:
38: import com.vividsolutions.jts.geom.Geometry;
39: import com.vividsolutions.jts.io.WKTReader;
40: import com.vividsolutions.jts.operation.polygonize.Polygonizer;
41:
42: /**
43: * Example of using Polygonizer class to polygonize a set of fully noded linestrings
44: *
45: * @version 1.7
46: */
47: public class PolygonizeExample {
48: public static void main(String[] args) throws Exception {
49: PolygonizeExample test = new PolygonizeExample();
50: try {
51: test.run();
52: } catch (Exception ex) {
53: ex.printStackTrace();
54: }
55: }
56:
57: public PolygonizeExample() {
58: }
59:
60: void run() throws Exception {
61: WKTReader rdr = new WKTReader();
62: Collection lines = new ArrayList();
63:
64: lines.add(rdr.read("LINESTRING (0 0 , 10 10)")); // isolated edge
65: lines.add(rdr.read("LINESTRING (185 221, 100 100)")); //dangling edge
66: lines.add(rdr.read("LINESTRING (185 221, 88 275, 180 316)"));
67: lines.add(rdr.read("LINESTRING (185 221, 292 281, 180 316)"));
68: lines.add(rdr.read("LINESTRING (189 98, 83 187, 185 221)"));
69: lines.add(rdr.read("LINESTRING (189 98, 325 168, 185 221)"));
70:
71: Polygonizer polygonizer = new Polygonizer();
72: polygonizer.add(lines);
73:
74: Collection polys = polygonizer.getPolygons();
75:
76: System.out.println("Polygons formed (" + polys.size() + "):");
77: System.out.println(polys);
78: }
79:
80: }
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