Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryCurve.cs
===================================================================
diff -u -r1974 -r3079
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryCurve.cs	(.../GeometryCurve.cs)	(revision 1974)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryCurve.cs	(.../GeometryCurve.cs)	(revision 3079)
@@ -125,6 +125,17 @@
         }
 
         /// <summary>
+        /// Locations the equals.
+        /// </summary>
+        /// <param name="aCurve">a curve.</param>
+        /// <returns></returns>
+        public bool LocationEquals(GeometryCurve aCurve)
+        {
+            return (headPoint.LocationEquals(aCurve.HeadPoint) && endPoint.LocationEquals(aCurve.EndPoint)) ||
+                   (headPoint.LocationEquals(aCurve.EndPoint) && endPoint.LocationEquals(aCurve.HeadPoint));
+        }
+
+        /// <summary>
         /// Swaps <see cref="HeadPoint"/> and <see cref="EndPoint"/>.
         /// </summary>
         public void Reverse()
@@ -186,7 +197,7 @@
         /// <param name="point">The point.</param>
         /// <param name="tolerance">The tolerance.</param>
         /// <returns></returns>
-        public bool ContainsPoint(Point2D point, double tolerance)
+        public bool ContainsPoint(Point2D point, double tolerance = GeometryConstants.Accuracy * 0.5)
         {
             return HeadPoint != null && EndPoint != null &&
                    Routines2D.DoesPointExistInLine(HeadPoint.X, HeadPoint.Z, EndPoint.X, EndPoint.Z, point.X, point.Z, tolerance);
@@ -202,6 +213,18 @@
         public override string ToString()
         {            
             return string.Empty;
-        }        
+        }
+
+        /// <summary>
+        /// Gets or sets the surface at the Left.
+        /// </summary>
+        public virtual GeometrySurface SurfaceAtLeft { get; set; }
+
+
+        /// <summary>
+        /// Gets or sets the surface at the Right.
+        /// </summary>
+        public virtual GeometrySurface SurfaceAtRight { get; set; }
+
     }
 }
\ No newline at end of file