GS⁺ Polygon Map

When defining polygons it is helpful to confirm the shape of the masks being defined by drawing the polygons prior to interpolation.   The overall area is the interpolation area specified in the Kriging window. Polygons are defined in the Polygon Definition Window. Exclusive polygons appear in red, inclusive in blue. In the map below, the area between the red outer (exclusive) polygon and the inner blue (inclusive) rectangle would remain unmapped.   A more complex polygon (e.g. the shape of a continent or a lake) could be defined by a more complex set of vertices in the Polygon Definition window.