adding some regions + logic to programmatically change color

Author: pmauduit

pom.xml

@@ -28,7 +28,7 @@
           </httpConnector>
         </configuration>
       </plugin>
-            <plugin>
+      <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>exec-maven-plugin</artifactId>
         <version>1.6.0</version>

src/main/java/fr/beneth/mapnik/EntryPoint.java

@@ -14,27 +14,35 @@
 import mapnik.Mapnik;
 import mapnik.Projection;
 import mapnik.Renderer;
+import mapnik.Layer;
 
 public class EntryPoint {
 
     public static void main(String[] args) throws ClassNotFoundException, URISyntaxException, IOException {
 
         Mapnik.initialize();
         // France métropolitaine
-        // -9.86 41.15
-        // 10.38 51.56
-        Box2d bounds = new Box2d(-9.86, 41.15, 10.38, 51.56);
+        // -9.86 41.15   : -1097610.18 5034491.87
+        // 10.38 51.56   : 1155496.31 6720955.49
+        Box2d bounds = new Box2d(-1097610.18, 5034491.87, 1155496.31, 6720955.49);
         MapDefinition m = new MapDefinition();
 
         URL myMapFile = EntryPoint.class.getResource("/data/france.xml");
         // This should be done by the initialize() call, but ...
         FreetypeEngine.registerFonts(Mapnik.getInstalledFontsDir(), true);
 
         m.loadMap(new File(myMapFile.toURI()).getAbsolutePath(), false);
-        m.setSrs(Projection.LATLNG_PARAMS);
+        // Programatically get Aquitaine and set it to red Style
+        Layer aquitaine = m.getLayer(1);
+        aquitaine.setStyles(new String[]{ "red" });
+        m.removeLayer(1);
+        m.addLayer(aquitaine);
+
+        m.setSrs(Projection.SRS900913_PARAMS);
         m.resize(4096, 4096);
         m.zoomToBox(bounds);
 
+
         Image image = new Image(4096, 4096);
         Renderer.renderAgg(m, image);
 

src/main/resources/data/france.xml

@@ -1,22 +1,52 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Map background-color="#000" srs="+proj=longlat +datum=WGS84 +no_defs">
+<Map background-color="#000" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs">
 	<Style name="white">
 		<Rule>
-			<PolygonSymbolizer fill-opacity="1" fill="#fff"/>
+			<PolygonSymbolizer fill-opacity="0.1" fill="#fff"/>
 		</Rule>
 	</Style>
 	<Style name="green">
 		<Rule>
-			<PolygonSymbolizer fill-opacity="0.8" fill="#0f0"/>
+			<PolygonSymbolizer fill-opacity="0.8" gamma="0.2" fill="#0f0" comp-op="lighten" />
+			<LineSymbolizer stroke-width="2" stroke="#0f0" />
+		</Rule>
+	</Style>
+	<Style name="red">
+		<Rule>
+			<PolygonSymbolizer fill-opacity="0.8" gamma="0.2" fill="#f00" comp-op="lighten" />
+			<LineSymbolizer stroke-width="2" stroke="#f00" />
 		</Rule>
 	</Style>
 	<Layer name="france.geojson" status="on" srs="+proj=longlat +datum=WGS84 +no_defs">
 		<StyleName>white</StyleName>
 		<Datasource>
 	      <Parameter name="type">ogr</Parameter>
 	      <Parameter name="file">france.geojson</Parameter>
-	      <Parameter name="layer">OGRGeoJSON</Parameter>
+	      <Parameter name="layer">france</Parameter>
+		</Datasource>
+	</Layer>
+	<Layer name="nouvelle-aquitaine.geojson" status="on" srs="+proj=longlat +datum=WGS84 +no_defs">
+		<StyleName>green</StyleName>
+		<Datasource>
+				<Parameter name="type">ogr</Parameter>
+				<Parameter name="file">nouvelle-aquitaine.geojson</Parameter>
+				<Parameter name="layer">Nouvelle-Aquitaine</Parameter>
+		</Datasource>
+	</Layer>
+	<Layer name="grand-est.geojson" status="on" srs="+proj=longlat +datum=WGS84 +no_defs">
+		<StyleName>green</StyleName>
+		<Datasource>
+				<Parameter name="type">ogr</Parameter>
+				<Parameter name="file">grand-est.geojson</Parameter>
+				<Parameter name="layer">grand-est</Parameter>
+		</Datasource>
+	</Layer>
+	<Layer name="hauts-de-france.geojson" status="on" srs="+proj=longlat +datum=WGS84 +no_defs">
+		<StyleName>green</StyleName>
+		<Datasource>
+				<Parameter name="type">ogr</Parameter>
+				<Parameter name="file">hauts-de-france.geojson</Parameter>
+				<Parameter name="layer">hauts-de-france</Parameter>
 		</Datasource>
 	</Layer>
-	
 </Map>