retrun default ReferenceSystem in TraCI

VadereManager/src/org/vadere/manager/traci/commandHandler/SimulationCommandHandler.java

@@ -389,6 +389,8 @@ public class SimulationCommandHandler extends CommandHandler<SimulationVar> {
 			ReferenceCoordinateSystem coord =
 					state.getScenarioStore().getTopography()
 							.getAttributes().getReferenceCoordinateSystem();
+			// ensure default EPSG:32632 ReferenceCoordinateSystem if nothing is set.
+			coord = coord == null ? new ReferenceCoordinateSystem() : coord;
 			if (coord != null){
 				coord.initialize();
 				CompoundObject o = CoordRef.asCompoundObject(

VadereState/src/org/vadere/state/attributes/scenario/AttributesTopography.java

@@ -16,7 +16,7 @@ public class AttributesTopography extends Attributes {
 	 *  Reference coordinate system to translate vadere topography to world cooridnate systems
 	 *  such as UTM zones, or GPS lon lat.
 	 */
-	private ReferenceCoordinateSystem referenceCoordinateSystem = null;
+	private ReferenceCoordinateSystem referenceCoordinateSystem = new ReferenceCoordinateSystem();
 
 	// Getters...
 

VadereState/src/org/vadere/state/scenario/ReferenceCoordinateSystem.java

@@ -48,10 +48,6 @@ public class ReferenceCoordinateSystem {
 	 */
 	private VPoint translation = new VPoint(0.0,0.0);
 
-	public ReferenceCoordinateSystem() {
-		this.initialized = false;
-	}
-
 	public ReferenceCoordinateSystem(String epsgCode, String description, VPoint translation) {
 		this.epsgCode = epsgCode;
 		this.description = description;
@@ -59,6 +55,10 @@ public class ReferenceCoordinateSystem {
 		this.initialized = false;
 	}
 
+	public ReferenceCoordinateSystem() {
+		this("EPSG:32632", "default reference system(EPSG:32632) without offset", new VPoint(0.0, 0.0));
+	}
+
 	public void initialize(){
 		if (initialized)
 			return;