CatchmentCatchmentGeometry Property
Get and set the list of coordinates of the catchment
The sequence of coordinates can represent one or more polygons. It is interpreted as follows:
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Polygons are stored in sequence.
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A polygon is stored with the outer ring first, and any holes following immediately.
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Any polygon ring (outer or inner) is represented as a string of coordinates, starting and ending with the same coordinate.
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Any polygon that is clockwise is assumed to be an outer polygon.
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Any polygon that is counter-clockwise is assumed to be a hole in the most recent outer polygon.
A hole must be fully contained by the most recent outer polygon and not overlap other holes.