Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java @ 1120:fb3947027e92

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Renamed WSPLGEN required waterlevels file to 'waterlevel.wst'. flys-artifacts/trunk@2627 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 01 Sep 2011 07:06:14 +0000
parents faca1825818e
children 66783d957201
rev   line source
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eeebf8514c7f The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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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
eeebf8514c7f The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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36 private GeometryUtils() {
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37 }
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38
eeebf8514c7f The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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39
eeebf8514c7f The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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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 return buildFeatureType(name, srs, geometryType, null);
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63 }
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64
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65
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66 /**
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67 * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder.
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68 *
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69 * @param name The name of the FeatureType.
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70 * @param srs The SRS (e.g. "EPSG:31466").
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71 * @param geometryType The geometry type's class (e.g. Polygon.class).
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72 * @param attrs Optional. An object with attribute-name/attribute-class
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73 * pairs where index 0 specifies the name as string and index 1 the type
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74 * as class.
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75 *
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76 * @return a new SimpleFeatureType.
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77 */
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78 public static SimpleFeatureType buildFeatureType(
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79 String name, String srs, Class geometryType, Object[][] attrs)
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80 {
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81 try {
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82 SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
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83 CoordinateReferenceSystem crs = CRS.decode(srs);
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84
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85 builder.setName("flys");
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86 builder.setNamespaceURI("http://www.intevation.de/");
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87 builder.setCRS(crs);
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88 builder.setSRS(srs);
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89
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90 builder.add("geometry", geometryType, crs);
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91
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92 if (attrs != null) {
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93 for (Object[] attr: attrs) {
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94 builder.add((String) attr[0], (Class) attr[1]);
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95 }
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96 }
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97
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98 return builder.buildFeatureType();
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99 }
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100 catch (NoSuchAuthorityCodeException nsae) {
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101 }
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102 catch (FactoryException fe) {
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103 }
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104
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105 return null;
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106 }
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107
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108
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109 public static List<SimpleFeature> parseGeoJSON(
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110 String geojson, SimpleFeatureType ft
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111 ) {
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112 List<SimpleFeature> collection = new ArrayList<SimpleFeature>();
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113
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114 try {
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115 FeatureJSON fjson = new FeatureJSON();
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116 fjson.setFeatureType(ft);
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117
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118 FeatureIterator<SimpleFeature> iterator =
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119 fjson.streamFeatureCollection(geojson);
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120
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121 while (iterator.hasNext()) {
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122 collection.add(iterator.next());
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123 }
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124 }
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125 catch (IOException ioe) {
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126 // TODO handle exception
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127 }
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128
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129 return collection;
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130 }
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131
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132
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133 public static boolean writeShapefile(
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134 File shape,
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135 SimpleFeatureType featureType,
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136 FeatureCollection collection)
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137 throws MalformedURLException, IOException
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138 {
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139 Map<String, Serializable> params = new HashMap<String, Serializable>();
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140 params.put("url", shape.toURI().toURL());
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141 params.put("create spatial index", Boolean.TRUE);
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142
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143 DataStoreFactorySpi dataStoreFactory = new ShapefileDataStoreFactory();
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144
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145 ShapefileDataStore newDataStore =
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146 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params);
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147 newDataStore.createSchema(featureType);
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148
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149 Transaction transaction = new DefaultTransaction("create");
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150
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151 String typeName = newDataStore.getTypeNames()[0];
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152
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153 FeatureStore<SimpleFeatureType, SimpleFeature> featureStore =
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154 (FeatureStore<SimpleFeatureType, SimpleFeature>)
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155 newDataStore.getFeatureSource(typeName);
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156
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157 featureStore.setTransaction(transaction);
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158
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159 featureStore.addFeatures(collection);
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160 transaction.commit();
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161
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162 return true;
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163 }
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164 }
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165 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org