diff --git a/java/com.sap.sailing.simulator.test/src/com/sap/sailing/simulator/test/WindFieldGeneratorTest.java b/java/com.sap.sailing.simulator.test/src/com/sap/sailing/simulator/test/WindFieldGeneratorTest.java
index 7e8eea90d57..1734a82d98f 100644
--- a/java/com.sap.sailing.simulator.test/src/com/sap/sailing/simulator/test/WindFieldGeneratorTest.java
+++ b/java/com.sap.sailing.simulator.test/src/com/sap/sailing/simulator/test/WindFieldGeneratorTest.java
@@ -35,7 +35,7 @@ public class WindFieldGeneratorTest {
         course.add(end);
        
         WindControlParameters windParameters = new WindControlParameters(3, 180);
-        RectangularBoundary bd = new RectangularBoundary(start, end);
+        RectangularBoundary bd = new RectangularBoundary(start, end, 0.1);
         WindFieldGeneratorBlastImpl wf = new WindFieldGeneratorBlastImpl(bd, windParameters);
         int hSteps = 10;
         int vSteps = 5;
diff --git a/java/com.sap.sailing.simulator/src/com/sap/sailing/simulator/impl/RectangularBoundary.java b/java/com.sap.sailing.simulator/src/com/sap/sailing/simulator/impl/RectangularBoundary.java
index c44c8df6ee0..7eaed2ae601 100644
--- a/java/com.sap.sailing.simulator/src/com/sap/sailing/simulator/impl/RectangularBoundary.java
+++ b/java/com.sap.sailing.simulator/src/com/sap/sailing/simulator/impl/RectangularBoundary.java
@@ -104,10 +104,10 @@ public class RectangularBoundary implements Boundary {
 		
 		Distance hStep = appWidth.scale(1.0/(hPoints-1)); 
 		Distance vStep = appHeight.scale(1.0/(vPoints-1));
-		Position[][] grid = new Position[hPoints][vPoints];
+		Position[][] grid = new Position[vPoints][hPoints];
 		
-		for (int i = 0; i < hPoints; i++) {
-			for (int j = 0; j < vPoints; j++) {
+		for (int i = 0; i < vPoints; i++) {
+			for (int j = 0; j < hPoints; j++) {
 				grid[i][j] = appSouthWest.
 						translateGreatCircle(getNorth(), vStep.scale(j)).
 						translateGreatCircle(getEast(), hStep.scale(i));
@@ -132,6 +132,7 @@ public class RectangularBoundary implements Boundary {
 	}
 
 	@Override
+	//may not return a rectangular lattice!
 	public List<Position> extractLattice(Distance hStep, Distance vStep) {
 		
 		Position startPoint = appSouthWest;