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> Has anyone out there developed any VisAD Data objects for > georeferencing? Right now there's visad.MapProjection for defining > map projections and I'm working on a class (LatLonTuple) as a > data object representing lat/lon points. Before I go too > far down the path, I wanted to see if someone else has already > been there. I was thinking that perhaps those working on the > GeoVista project or Ugo might have something. Just to clarify, the basics needed for georeferencing are built into VisAD, as the CoordinateSystem class and the static instances RealType.Latitude, RealType.Longitude and RealType.Altitude. There is also a class EarthVectorType that extends RealTupleType (indirectly via RealVectorType) for Earth-based wind and current vectors that don't transform according to the usual Jacobean rule in coordinate transforms. And there is some specialized logic down in the display clases for dealing with earth coordinates (much of this worked out in collaboration with Don). So I think Don is asking for classes that build on these existing VisAD basics. CoordinateSystem is pretty generic (e.g., it also deals with color coordinate systems) so he's looking for specializations for Earth coordinates. One example would be the various slightly different latitude-longitude definitions. Cheers, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
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