GS⁺ Define Polygon Outlines

Irregular shapes can be interpolated or excluded from being interpolated by defining polygons prior to kriging. Define the polygons to be used by entering coordinates of polygon vertices, i.e. the coordinate pairs that define the polygon outline. An unlimited number of vertices can be specified per polygon (up to several billion), and polygons may be nested within one another as in the example below. The Map command allows you to check the shape of the polygon while it is being defined.

The example below defines two polygons: the first is a 6-sided area that is excluded from interpolation, the second defines an inclusive 4-sided area (rectangle) inside the 6-sided area. The Polygon Map Window shows the shapes of the polygon.