Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
>From: "Vimal Gopal" <gopal@xxxxxxx> >Organization: GST >Keywords: 200007271837.e6RIb5T25977 Vimal- > > I was wondering whether anyone knew whether there is a way in VisAD >to apply an overlay to VisAD displays. By overlay, I mean, geopraphical >boundries, long/lat lines, etc. I'm guessing the way to do this is by >using sets and to "connect the dots". Any insight is appreciated. Map lines best described by a UnionSet of Gridded2DSets which each Gridded2DSet is a segment of the line. A simple example of map lines is in Rivers.java in visad/examples. In this example, each of the segments of the river is a Gridded2DSet and a UnionSet is constructed to make the complete river. An example of map overlays on a satellite image can be seen by running 'java -Xmx64m SatDisplay' in the visad/examples directory. In this example, visad.data.mcidas.BaseMapAdapter reads in a remote McIDAS map file and creates a UnionSet of Gridded2DSets - each of which is a map line segment. The same can be done with things like Shapefiles. Unidata has a a ShapefileAdapter which we hope to make available in the near future. Don Murray ************************************************************* Don Murray UCAR Unidata Program dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000 (303) 497-8628 Boulder, CO 80307 ************************************************************* Unidata WWW Server http://www.unidata.ucar.edu/ McIDAS Demonstration Machine http://mcdemo.unidata.ucar.edu/ *************************************************************
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