Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/LayerCreator.cs
===================================================================
diff -u -r3159 -r3163
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/LayerCreator.cs	(.../LayerCreator.cs)	(revision 3159)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/LayerCreator.cs	(.../LayerCreator.cs)	(revision 3163)
@@ -71,8 +71,13 @@
             {
                 loggedLocations.Add(string.Format("Handling location {0} with surface line {1}", location.LocationId, location.SurfacelineId));
                 SurfaceLine surfaceLine = FindSurfaceLine(location.SurfacelineId);
-                var geometryCreator = new GeometryCreator(location, surfaceLine, OutputFolderName);
-                geometryCreator.Execute();
+                var layerSurfaceLine = DetermineSurfaceLineForGivenLayerData(surfaceLine, location.LayerThickness);
+
+                var layerGeometryCreator = new GeometryCreator(location, surfaceLine, layerSurfaceLine, OutputFolderName);
+                var stiFileName = layerGeometryCreator.Execute(true);
+
+                location.SoilGeometryName = stiFileName;
+                layerGeometryCreator.Execute(false);
             }
             WriteToLog(loggedLocations);
             throw new System.NotImplementedException();
@@ -118,6 +123,12 @@
             string fullFilePath = Path.Combine(OutputFolderName, logFile);
             File.AppendAllLines(fullFilePath, linesToAdd);
         }
+
+        private SurfaceLine DetermineSurfaceLineForGivenLayerData(SurfaceLine originalSurfaceLine, double layerThickness)
+        {
+            // Todo create this
+            return null;
+        }
     }
 
 }
\ No newline at end of file
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/GeometryCreator.cs
===================================================================
diff -u -r3089 -r3163
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/GeometryCreator.cs	(.../GeometryCreator.cs)	(revision 3089)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.LayerCreator/GeometryCreator.cs	(.../GeometryCreator.cs)	(revision 3163)
@@ -26,21 +26,36 @@
     /// <summary></summary>
     internal class GeometryCreator
     {
+        private Location location;
+        private SurfaceLine surfaceLine;
+        private SurfaceLine loweredSurfaceLine;
+
         /// <summary>Initializes a new instance of the <see cref="GeometryCreator"/> class.</summary>
         /// <param name="location">The location.</param>
         /// <param name="surfaceLine">The surface line.</param>
+        /// <param name="loweredSurfaceLine"></param>
         /// <param name="outputFolderName">Name of the output folder.</param>
         /// <exception cref="System.NotImplementedException"></exception>
-        public GeometryCreator(Location location, SurfaceLine surfaceLine, string outputFolderName)
+        public GeometryCreator(Location location, SurfaceLine surfaceLine, SurfaceLine loweredSurfaceLine, string outputFolderName)
         {
+            this.location = location;
+            this.surfaceLine = surfaceLine;
+            this.loweredSurfaceLine = loweredSurfaceLine;
             throw new System.NotImplementedException();
         }
 
         /// <summary>Executes this instance.</summary>
         /// <exception cref="System.NotImplementedException"></exception>
-        public void Execute()
+        public string Execute(bool firstForLoweredLayer)
         {
+            if (firstForLoweredLayer)
+            {
+                //todo call with low surfacline, return name of intermediate sti file.
+                return "InterimStiFile.sti";
+            }
+            //todo call with normal surfaceline
             throw new System.NotImplementedException();
+            return "";
         }
     }
 }
\ No newline at end of file