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John, A Gridded3DSet can define a 3-D shape on a 2-D manifold. Typically, the points in the 2-D manifold would map to (Latitude, Longitude, Z) points in 3-D space and the points would have constant delta-Latitude and delta-Longitude intervals between them. The 2-D manifold has rectangular cell topology and can be thought of as a conformal mapping of the (Latitude, Longitude) polar coordinate space. The Gridded3DSet constructor to use is Gridded3DSet(MathType type, float[][] samples, int lengthX, int lengthY) Regards, Steve Emmerson <http://www.unidata.ucar.edu>
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