Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java @ 1111:b96ce07ba56c
Added dummy sceleton for Cross Sections.
flys-artifacts/trunk@2617 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 31 Aug 2011 10:24:49 +0000 |
parents | 5b1198c27d43 |
children | faca1825818e |
rev | line source |
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The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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1 package de.intevation.flys.utils; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.File; |
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5 import java.io.Serializable; |
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6 import java.net.MalformedURLException; |
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7 import java.util.ArrayList; |
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8 import java.util.HashMap; |
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9 import java.util.List; |
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10 import java.util.Map; |
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11 |
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12 import com.vividsolutions.jts.geom.Coordinate; |
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13 import com.vividsolutions.jts.geom.Geometry; |
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14 |
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15 import org.opengis.feature.simple.SimpleFeature; |
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16 import org.opengis.feature.simple.SimpleFeatureType; |
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17 import org.opengis.referencing.FactoryException; |
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18 import org.opengis.referencing.NoSuchAuthorityCodeException; |
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19 import org.opengis.referencing.crs.CoordinateReferenceSystem; |
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20 |
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21 import org.geotools.data.DataStoreFactorySpi; |
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22 import org.geotools.data.FeatureStore; |
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23 import org.geotools.data.DefaultTransaction; |
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24 import org.geotools.data.Transaction; |
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25 import org.geotools.data.shapefile.ShapefileDataStore; |
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26 import org.geotools.data.shapefile.ShapefileDataStoreFactory; |
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27 import org.geotools.feature.FeatureIterator; |
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28 import org.geotools.feature.FeatureCollection; |
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29 import org.geotools.feature.simple.SimpleFeatureTypeBuilder; |
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30 import org.geotools.geojson.feature.FeatureJSON; |
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31 import org.geotools.referencing.CRS; |
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32 |
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33 |
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34 public class GeometryUtils { |
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35 |
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36 private GeometryUtils() { |
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37 } |
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38 |
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39 |
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40 /** |
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41 * Returns the boundary of Geometry <i>geom</i> in OpenLayers |
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42 * representation. |
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43 * |
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44 * @param geom The geometry. |
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45 * |
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46 * @return the OpenLayers boundary of <i>geom</i>. |
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47 */ |
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48 public static String jtsBoundsToOLBounds(Geometry geom) { |
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49 Coordinate[] c = geom != null ? geom.getCoordinates() : null; |
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50 |
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51 if (c == null || c.length < 2) { |
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52 return null; |
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53 } |
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54 |
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55 return "" + c[0].x + " " + c[1].y + " " + c[1].x + " " + c[0].y; |
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56 } |
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57 |
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58 |
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59 public static SimpleFeatureType buildFeatureType( |
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60 String name, String srs, Class geometryType) |
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61 { |
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62 try { |
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63 SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder(); |
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64 CoordinateReferenceSystem crs = CRS.decode(srs); |
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65 |
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66 builder.setName("flys"); |
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67 builder.setNamespaceURI("http://www.intevation.de/"); |
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68 builder.setCRS(crs); |
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69 builder.setSRS(srs); |
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70 |
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71 builder.add("geometry", geometryType, crs); |
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72 |
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73 return builder.buildFeatureType(); |
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74 } |
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75 catch (NoSuchAuthorityCodeException nsae) { |
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76 } |
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77 catch (FactoryException fe) { |
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78 } |
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79 |
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80 return null; |
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81 } |
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82 |
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83 |
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84 public static List<SimpleFeature> parseGeoJSON( |
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85 String geojson, SimpleFeatureType ft |
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86 ) { |
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87 List<SimpleFeature> collection = new ArrayList<SimpleFeature>(); |
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88 |
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89 try { |
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90 FeatureJSON fjson = new FeatureJSON(); |
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91 fjson.setFeatureType(ft); |
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92 |
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93 FeatureIterator<SimpleFeature> iterator = |
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94 fjson.streamFeatureCollection(geojson); |
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95 |
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96 while (iterator.hasNext()) { |
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97 collection.add(iterator.next()); |
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98 } |
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99 } |
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100 catch (IOException ioe) { |
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101 // TODO handle exception |
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102 } |
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103 |
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104 return collection; |
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105 } |
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106 |
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107 |
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108 public static boolean writeShapefile( |
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109 File shape, |
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110 SimpleFeatureType featureType, |
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111 FeatureCollection collection) |
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112 throws MalformedURLException, IOException |
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113 { |
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114 Map<String, Serializable> params = new HashMap<String, Serializable>(); |
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115 params.put("url", shape.toURI().toURL()); |
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116 params.put("create spatial index", Boolean.TRUE); |
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117 |
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118 DataStoreFactorySpi dataStoreFactory = new ShapefileDataStoreFactory(); |
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119 |
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120 ShapefileDataStore newDataStore = |
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121 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params); |
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122 newDataStore.createSchema(featureType); |
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123 |
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124 Transaction transaction = new DefaultTransaction("create"); |
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125 |
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126 String typeName = newDataStore.getTypeNames()[0]; |
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127 |
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128 FeatureStore<SimpleFeatureType, SimpleFeature> featureStore = |
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129 (FeatureStore<SimpleFeatureType, SimpleFeature>) |
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130 newDataStore.getFeatureSource(typeName); |
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131 |
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132 featureStore.setTransaction(transaction); |
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133 |
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134 featureStore.addFeatures(collection); |
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135 transaction.commit(); |
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136 |
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137 return true; |
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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 : |