001: /*
002: * The JTS Topology Suite is a collection of Java classes that
003: * implement the fundamental operations required to validate a given
004: * geo-spatial data set to a known topological specification.
005: *
006: * Copyright (C) 2001 Vivid Solutions
007: *
008: * This library is free software; you can redistribute it and/or
009: * modify it under the terms of the GNU Lesser General Public
010: * License as published by the Free Software Foundation; either
011: * version 2.1 of the License, or (at your option) any later version.
012: *
013: * This library is distributed in the hope that it will be useful,
014: * but WITHOUT ANY WARRANTY; without even the implied warranty of
015: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
016: * Lesser General Public License for more details.
017: *
018: * You should have received a copy of the GNU Lesser General Public
019: * License along with this library; if not, write to the Free Software
020: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
021: *
022: * For more information, contact:
023: *
024: * Vivid Solutions
025: * Suite #1A
026: * 2328 Government Street
027: * Victoria BC V8T 5G5
028: * Canada
029: *
030: * (250)385-6040
031: * www.vividsolutions.com
032: */
033: package com.vividsolutions.jtsexample.operation.linemerge;
034:
035: import com.vividsolutions.jts.geom.Geometry;
036: import com.vividsolutions.jts.io.WKTReader;
037: import com.vividsolutions.jts.operation.linemerge.LineMerger;
038:
039: import java.util.ArrayList;
040: import java.util.Collection;
041:
042: /**
043: * Example of using the LineMerger class to sew together a set of fully noded
044: * linestrings.
045: *
046: * @version 1.7
047: */
048: public class LineMergeExample {
049: private WKTReader reader = new WKTReader();
050:
051: public LineMergeExample() {
052: }
053:
054: public static void main(String[] args) throws Exception {
055: LineMergeExample test = new LineMergeExample();
056: try {
057: test.run();
058: } catch (Exception ex) {
059: ex.printStackTrace();
060: }
061: }
062:
063: void run() throws Exception {
064: Collection lineStrings = getData();
065:
066: LineMerger lineMerger = new LineMerger();
067: lineMerger.add(lineStrings);
068: Collection mergedLineStrings = lineMerger
069: .getMergedLineStrings();
070:
071: System.out.println("Lines formed (" + mergedLineStrings.size()
072: + "):");
073: System.out.println(mergedLineStrings);
074: }
075:
076: Collection getData() {
077: Collection lines = new ArrayList();
078: lines
079: .add(read("LINESTRING (220 160, 240 150, 270 150, 290 170)"));
080: lines.add(read("LINESTRING (60 210, 30 190, 30 160)"));
081: lines
082: .add(read("LINESTRING (70 430, 100 430, 120 420, 140 400)"));
083: lines
084: .add(read("LINESTRING (160 310, 160 280, 160 250, 170 230)"));
085: lines
086: .add(read("LINESTRING (170 230, 180 210, 200 180, 220 160)"));
087: lines.add(read("LINESTRING (30 160, 40 150, 70 150)"));
088: lines
089: .add(read("LINESTRING (160 310, 200 330, 220 340, 240 360)"));
090: lines
091: .add(read("LINESTRING (140 400, 150 370, 160 340, 160 310)"));
092: lines
093: .add(read("LINESTRING (160 310, 130 300, 100 290, 70 270)"));
094: lines
095: .add(read("LINESTRING (240 360, 260 390, 260 410, 250 430)"));
096: lines.add(read("LINESTRING (70 150, 100 180, 100 200)"));
097: lines
098: .add(read("LINESTRING (70 270, 60 260, 50 240, 50 220, 60 210)"));
099: lines.add(read("LINESTRING (100 200, 90 210, 60 210)"));
100:
101: return lines;
102: }
103:
104: Geometry read(String lineWKT) {
105: try {
106: Geometry geom = reader.read(lineWKT);
107:
108: return geom;
109: } catch (Exception ex) {
110: ex.printStackTrace();
111: }
112:
113: return null;
114: }
115: }
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