Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/SurfaceLinePointEntityReadExtensions.cs
===================================================================
diff -u -ra5714fc0488030773fff50dfc82041c6cb9edc2f -ra294987551b0b2d8a27b6e1bc6235b0e2351b6f4
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/SurfaceLinePointEntityReadExtensions.cs	(.../SurfaceLinePointEntityReadExtensions.cs)	(revision a5714fc0488030773fff50dfc82041c6cb9edc2f)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/SurfaceLinePointEntityReadExtensions.cs	(.../SurfaceLinePointEntityReadExtensions.cs)	(revision a294987551b0b2d8a27b6e1bc6235b0e2351b6f4)
@@ -56,9 +56,9 @@
             }
 
             var surfaceLineGeometryPoint = new Point3D(
-                Convert.ToDouble(entity.X),
-                Convert.ToDouble(entity.Y),
-                Convert.ToDouble(entity.Z))
+                entity.X.ToNullAsNaN(),
+                entity.Y.ToNullAsNaN(),
+                entity.Z.ToNullAsNaN())
             {
                 StorageId = entity.SurfaceLinePointEntityId
             };