--- a/gnv-artifacts/src/main/java/de/intevation/gnv/math/AreaInterpolation.java	Mon Jan 25 17:06:01 2010 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/math/AreaInterpolation.java	Mon Jan 25 18:25:19 2010 +0000
@@ -22,9 +22,6 @@
 {
     private static Logger log = Logger.getLogger(AreaInterpolation.class);
 
-    public static final int CULL_POINT_THRESHOLD = Integer.getInteger(
-        "gnv.areainterpolation.cull.point.threshold", 1000);
-
     protected double [] raster;
 
     protected int width;
@@ -61,17 +58,11 @@
             return false;
         }
 
-        Envelope relevantArea = null;
-        
-        if (points.size() > CULL_POINT_THRESHOLD) {
-            relevantArea = new Envelope(boundingBox);
-            relevantArea.expandBy(
-                0.05d*boundingBox.getWidth(),
-                0.05d*boundingBox.getHeight());
-        }
-
         List<GridCell> cells = GridCell.pointsToGridCells(
-            points, relevantArea);
+            points,
+            Interpolation2D.relevantArea(
+                boundingBox,
+                points));
 
         if (cells.isEmpty()) {
             log.warn("no cells to interpolate");