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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Fábio, > I'm working with Cicero and we are stucked with this difficulty to plot > maps using the Visad library. The fact is that we don't want to reinvent > the wheel and I've told him to ask people who already had the same > problem about their solutions. > . . . In VisAD we represent maps as UnionSets of Gridded2DSets with manifold dimension = 1. There is a simple example in visad/examples/Rivers.java. You can also look at the getData() method of visad/data/mcidas/BaseMapAdapter.java to see our code for reading McIDAS map files and constructing UnionSets. As I suggested to Cicero, you should try to print out the number of Gridded2DSets in your UnionSet. If there are a large number of small Gridded2DSets (for example, if each contains just one line between a pair of points), then you need to find a way to combine them into fewer Gridded2DSets with more points each. This should be possible for map boundaries and rivers. We use this approach with the McIDAS map files and get good performance. I think Unidata does the same thing with Shape files containing maps. Good luck, 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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