Hi Luke, In visad/DelaunayCustom.java the method: public static Irregular2DSet fill(Gridded2DSet set) produces an Irregular2DSet for the interior of the boundary defined by the argument 'Gridded2DSet set', which must have manifold dimension = 1. If the ShapefileAdapter returns a UnionSet of many Gridded2DSets, then you must extract the one for the boundary of interest, or even combine multiple Gridded2DSets into one for the entire boundary. Cheers, Bill
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