Hi Bill, thanks for the help.
Indeed some of my Gridded2DSets from the OUTLUSAM BaseMapAdapter must have been self-intersecting, and others gave a null
Irregular2DSet as a result of the fill operation. This makes sense since I supplied a bounding lat/lon box, so I expect some
non closed regions.
What i didn't know was that cannot add Gridded2DSets and Irregular2DSets to the same UnionSet object, all manifolds have to
match. I was hoping to maintain any coastlines I could not fill.
A better way is to increase my lat/lon boundary to be bigger than the area I am
trying to show.
Anyways, I get great filled land masses, looks mDSet'such better.
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