Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/JTSMultiLineStringProducer.java @ 469:62fc63d0f71d

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Added a new State in Product Verticalprofile in Timeseriespoints. Now it will be displayed the Years where measurements happened and than only the dates of the chosen Year will be fetched and displayed. gnv-artifacts/trunk@532 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 12 Jan 2010 12:42:53 +0000
parents f7038820df2e
children 4080b57dcb52
rev   line source
465
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
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
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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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
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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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 :
http://dive4elements.wald.intevation.org