Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/MapInfoService.java @ 8202:e4606eae8ea5

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sed src/**/*.java 's/logger/log/g'
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 05 Sep 2014 12:58:17 +0200
parents af13ceeba52a
children 5e38e2924c07
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.services;
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10
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11 import com.vividsolutions.jts.geom.Envelope;
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12
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13 import org.dive4elements.artifactdatabase.XMLService;
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14 import org.dive4elements.artifacts.CallMeta;
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15 import org.dive4elements.artifacts.GlobalContext;
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16 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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17 import org.dive4elements.artifacts.common.utils.Config;
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18 import org.dive4elements.artifacts.common.utils.XMLUtils;
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19 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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20 import org.dive4elements.river.utils.GeometryUtils;
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21
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22 import java.util.HashMap;
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23 import java.util.Map;
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24
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25 import javax.xml.xpath.XPathConstants;
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26
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27 import org.apache.log4j.Logger;
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28 import org.w3c.dom.Document;
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29 import org.w3c.dom.Element;
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30 import org.w3c.dom.Node;
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31
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32 /**
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33 * This service provides information about the supported rivers by this
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34 * application.
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35 *
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36 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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37 */
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38 public class MapInfoService extends XMLService {
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39
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40 /** XPath that points to the river.*/
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41 public static final String XPATH_RIVER = "/mapinfo/river/text()";
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42
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43 public static final String XPATH_MAPTYPE = "/mapinfo/maptype/text()";
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44
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45 private static final String XPATH_RIVER_PROJECTION =
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46 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/srid/@value";
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47
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48 private static final String XPATH_RIVER_BACKGROUND =
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49 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/background-wms";
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50
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51 private static final String XPATH_RIVER_WMS =
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52 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/river-wms";
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53
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54
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55 /** The log used in this service.*/
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56 private static Logger log = Logger.getLogger(MapInfoService.class);
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57
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58
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59 /**
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60 * The default constructor.
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61 */
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62 public MapInfoService() {
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63 }
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64
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65 protected static String getStringXPath(
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66 String query,
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67 Map<String, String> variables
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68 ) {
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69 return (String)XMLUtils.xpath(
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70 Config.getConfig(), query, XPathConstants.STRING,
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71 null, variables);
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72 }
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73
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74 protected static Node getNodeXPath(
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75 String query,
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76 Map<String, String> variables
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77 ) {
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78 return (Node)XMLUtils.xpath(
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79 Config.getConfig(), query, XPathConstants.NODE,
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80 null, variables);
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81 }
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82
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83 @Override
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84 public Document processXML(
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85 Document data,
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86 GlobalContext globalContext,
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87 CallMeta callMeta
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88 ) {
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89 log.debug("MapInfoService.process");
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90
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91 Document result = XMLUtils.newDocument();
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92 ElementCreator cr = new ElementCreator(result, null, null);
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93
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94 Element mapinfo = cr.create("mapinfo");
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95 result.appendChild(mapinfo);
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96
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97 String river = extractRiver(data);
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98 if (river == null || river.length() == 0) {
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99 log.warn("Cannot generate information: river is empty!");
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100 return result;
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101 }
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102
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103 String mapType = extractMaptype(data);
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104 if (mapType == null
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105 || !(mapType.equals("floodmap") || mapType.equals("rivermap"))) {
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106 mapType = "floodmap";
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107 }
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108
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109 Element root = cr.create("river");
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110 cr.addAttr(root, "name", river);
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111 mapinfo.appendChild(root);
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112
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113 Envelope env = GeometryUtils.getRiverBoundary(river);
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114 if (env != null) {
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115 String bounds = GeometryUtils.jtsBoundsToOLBounds(env);
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116 if (log.isDebugEnabled()) {
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117 log.debug("River '" + river + "' bounds: " + bounds);
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118 }
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119
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120 Element bbox = cr.create("bbox");
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121 cr.addAttr(bbox, "value", bounds);
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122 root.appendChild(bbox);
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123 }
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124
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125 Map<String, String> vars = new HashMap<String, String>();
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126 vars.put("maptype", mapType);
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127 vars.put("river", river);
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128
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129 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars);
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130
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131 if (sridStr != null && sridStr.length() > 0) {
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132 Element srid = cr.create("srid");
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133 cr.addAttr(srid, "value", sridStr);
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134 root.appendChild(srid);
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135 }
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136
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137 if (log.isDebugEnabled()) {
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138 log.debug("processXML: " + XMLUtils.toString(root));
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139 }
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140
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141 root.appendChild(
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142 createWMSElement("background-wms",
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143 XPATH_RIVER_BACKGROUND, vars, cr));
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144
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145 root.appendChild(
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146 createWMSElement("river-wms",
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147 XPATH_RIVER_WMS, vars, cr));
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148
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149 return result;
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150 }
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151
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152
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153 protected Element createWMSElement(
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154 String elementName,
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155 String xpath,
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156 Map<String, String> vars,
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157 ElementCreator cr)
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158 {
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159 log.debug("createWMSElement()");
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160
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161 Element el = cr.create(elementName);
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162 Element wms = (Element)getNodeXPath(xpath, vars);
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163
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164 if (wms != null) {
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165 cr.addAttr(el, "url", wms.getAttribute("url"));
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166 cr.addAttr(el, "layers", wms.getAttribute("layers"));
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167
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168 log.debug("createWMSElement: " + XMLUtils.toString(el));
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169 }
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170 else {
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171 log.debug("createWMSElement: wms == null");
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172 }
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173
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174 return el;
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175 }
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176
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177
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178 private static String extractRiver(Document data) {
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179 return XMLUtils.xpathString(
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180 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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181 }
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182
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183 private static String extractMaptype(Document data) {
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184 return XMLUtils.xpathString(
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185 data, XPATH_MAPTYPE, ArtifactNamespaceContext.INSTANCE);
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186 }
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187 }
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188 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org