Cutting polygon that defines an input image's valid area.
// Java public TGIS_ShapePolygon getCuttingPolygon(); public void setCuttingPolygon( TGIS_ShapePolygon _value );
// Oxygene public property CuttingPolygon : TGIS_ShapePolygon read write;
Attached polygon must be a copy of a existing polygon or newly created object (to be managed by TGIS_LayerPixel).
Polygon must be in the same Coordinate System as the layer.
Pseudo-code for copying polygon before attaching it to the CuttingPolygon property:
layer.CuttingPolygon = shp.CreateCopyCS( layer.CS )