Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryPointString.cs
===================================================================
diff -u -r1974 -r3079
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryPointString.cs	(.../GeometryPointString.cs)	(revision 1974)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryPointString.cs	(.../GeometryPointString.cs)	(revision 3079)
@@ -591,6 +591,23 @@
         }
 
         /// <summary>
+        /// Removes the non ascending points on surface line.
+        /// </summary>
+        public void RemoveNonAscendingPointsOnSurfaceLine()
+        {
+            for (int i = points.Count - 1; i > 0; i--)
+            {
+                if (Math.Abs(points[i].X - points[i - 1].X) < GeometryConstants.Accuracy)
+                {
+                    if (Math.Abs(points[i].Z - points[i - 1].Z) > GeometryConstants.Accuracy)
+                    {
+                        points.Remove(points[i]);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
         /// Gets a part of the geometry point string defined by a begin and end point
         /// </summary>
         /// <param name="begin"></param>