RIO observer

src/main/java/environment/RIOBasinNetworkObserverPresence.java

@@ -183,7 +183,7 @@ public class RIOBasinNetworkObserverPresence extends ObserverListener implements
 		if (mapContinent == null) {
 			maxX = maxY = Double.NEGATIVE_INFINITY;
 			minX = minY = Double.POSITIVE_INFINITY;
-			mapContinent = ((BasinNetworkSWithContinent) pilot.getAquaticWorld().getEnvironment()).getMapContinent();
+			mapContinent = ((RIOBasinNetworkWithContinent) pilot.getAquaticWorld().getEnvironment()).getMapContinent();
 			for (Path2D.Double path : mapContinent.values()) {
 				minX = Math.min(minX, path.getBounds2D().getMinX());
 				maxX = Math.max(maxX, path.getBounds2D().getMaxX());