diff -u -r1.1 -r1.2
--- CartesianGridXY.java	15 Sep 2009 00:57:52 -0000	1.1
+++ CartesianGridXY.java	15 Sep 2009 19:55:31 -0000	1.2
@@ -36,6 +36,8 @@

 	private double[] globalPosition =
 	{ 0, 0, 0 };
 	

+	private boolean needsCompute = true;
+	

 	List<Integer> geomFields;
 
 	public CartesianGridXY(Element node) throws DataConversionException

@@ -148,6 +150,11 @@

 	
 	public double[] getPosition()
 	{

+		if (needsCompute)
+		{
+			computePosition();
+			needsCompute = false;
+		}

 		return globalPosition;
 	}
 	

@@ -184,7 +191,7 @@

 	public void setID(long id)
 	{
 		super.setID(id);

-		computePosition();

+		needsCompute = true;

 	}
 
 	public void setIDDescription(IDDescriptor id)

diff -u -r1.11 -r1.12
--- SegmentationBase.java	15 Sep 2009 00:56:22 -0000	1.11
+++ SegmentationBase.java	15 Sep 2009 19:55:31 -0000	1.12
@@ -123,5 +123,5 @@

 	public long getID()
 	{
 		return this.getDecoder().getID();

-	}

+	}	

 }