Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/JTSMultiLineStringProducer.java @ 483:c8089cd7d777
Added explicit index scheme to palette classes to allow external references.
gnv-artifacts/trunk@558 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 18 Jan 2010 10:56:41 +0000 |
parents | f7038820df2e |
children | 4080b57dcb52 |
rev | line source |
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Added support to trace rasters to JTS multi polygons and multi line strings.
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parents:
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1 package de.intevation.gnv.raster; |
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2 |
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3 import java.util.List; |
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4 import java.util.ArrayList; |
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5 |
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6 import org.apache.log4j.Logger; |
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7 |
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8 import com.vividsolutions.jts.geom.GeometryFactory; |
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9 import com.vividsolutions.jts.geom.MultiLineString; |
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10 import com.vividsolutions.jts.geom.LineString; |
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11 import com.vividsolutions.jts.geom.Coordinate; |
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12 |
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13 import gnu.trove.TIntObjectHashMap; |
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14 |
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15 import de.intevation.gnv.raster.Vectorizer.Edge; |
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16 |
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17 import de.intevation.gnv.utils.Pair; |
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18 |
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19 import de.intevation.gnv.math.IJKey; |
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20 |
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21 /** |
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22 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) |
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23 */ |
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24 public class JTSMultiLineStringProducer |
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25 extends IsoProducer |
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26 { |
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27 private static Logger log = Logger.getLogger( |
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28 JTSMultiLineStringProducer.class); |
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29 |
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30 protected GeometryFactory geometryFactory; |
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31 |
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32 public JTSMultiLineStringProducer( |
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33 double minX, double minY, |
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34 double maxX, double maxY |
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35 ) { |
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36 this( |
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37 JTSMultiPolygonProducer.createDefaultGeometryFactory(), |
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38 minX, minY, |
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39 maxX, maxY); |
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40 } |
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41 |
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42 public JTSMultiLineStringProducer( |
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43 GeometryFactory geometryFactory, |
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44 double minX, double minY, |
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45 double maxX, double maxY |
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46 ) { |
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47 super(minX, minY, maxX, maxY); |
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48 this.geometryFactory = geometryFactory; |
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49 } |
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50 |
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51 public List<Pair<Object, MultiLineString>> getMultiLineStrings( |
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52 AttributeGenerator attributeGenerator |
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53 ) { |
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54 ArrayList<Pair<Object, MultiLineString>> multiLineStrings = |
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55 new ArrayList<Pair<Object, MultiLineString>>(); |
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56 |
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57 double b1 = minX; |
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58 double m1 = width != 1 |
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59 ? (maxX - minX)/(width-1) |
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60 : 0d; |
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61 |
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62 double b2 = minY; |
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63 double m2 = height != 1 |
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64 ? (maxY - minY)/(height-1) |
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65 : 0d; |
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66 |
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67 ArrayList<Coordinate> coordinates = new ArrayList<Coordinate>(); |
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68 |
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69 for (IJKey key: joinPairs()) { |
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70 ArrayList<LineString> lineStrings = new ArrayList<LineString>(); |
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71 |
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72 // process complete |
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73 ArrayList<Edge> completeList = complete.get(key); |
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74 if (completeList != null) { |
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75 for (Edge head: completeList) { |
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76 Edge current = head; |
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77 do { |
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78 coordinates.add(new Coordinate( |
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79 m1*(current.a % width) + b1, |
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80 m2*(current.a / width) + b2)); |
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81 } |
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82 while ((current = current.next) != head); |
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83 // add head again to close shape |
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84 coordinates.add(new Coordinate( |
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85 m1*(head.a % width) + b1, |
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86 m2*(head.a / width) + b2)); |
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87 lineStrings.add( |
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88 geometryFactory.createLineString( |
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89 coordinates.toArray( |
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90 new Coordinate[coordinates.size()]))); |
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91 coordinates.clear(); |
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92 } |
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93 } |
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94 |
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95 // process open |
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96 TIntObjectHashMap map = commonOpen.get(key); |
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97 |
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98 if (map != null) { |
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99 for (Edge head: headList(map)) { |
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100 |
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101 head = Vectorizer.simplify(head, width); |
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102 Edge current = head, last = head; |
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103 do { |
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104 coordinates.add(new Coordinate( |
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105 m1*(current.a % width) + b1, |
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106 m2*(current.a / width) + b2)); |
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107 last = current; |
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108 } |
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109 while ((current = current.next) != null); |
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110 // add b from tail |
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111 coordinates.add(new Coordinate( |
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112 m1*(last.b % width) + b1, |
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113 m2*(last.b / width) + b2)); |
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114 lineStrings.add( |
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115 geometryFactory.createLineString( |
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116 coordinates.toArray( |
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117 new Coordinate[coordinates.size()]))); |
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118 coordinates.clear(); |
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119 } // for all in common open |
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120 } // if map defined for key |
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121 |
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122 if (!lineStrings.isEmpty()) { |
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123 MultiLineString multiLineString = |
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124 geometryFactory.createMultiLineString( |
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125 lineStrings.toArray( |
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126 new LineString[lineStrings.size()])); |
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127 lineStrings.clear(); |
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128 Object attribute = attributeGenerator != null |
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129 ? attributeGenerator.generateAttribute(key.i, key.j) |
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130 : key; |
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131 multiLineStrings.add(new Pair<Object, MultiLineString>( |
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132 attribute, |
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133 multiLineString)); |
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134 } |
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135 } // for all pairs |
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136 |
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137 return multiLineStrings; |
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138 } |
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139 } |
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |