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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.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 Gopal, I am currently working on the related subject of multiple display/multiple data rendering to promote interactive response. My task involves displaying meteological data both three-dimensionaly and two-dimensionally on a 3D Globe, and on map projections, allowing user to (1) switch between mode of display, (2) switch on/off displayed data, and (3) add/remove data as needed. So far, it has been a rewarding experience with VisAD. At the moment, I have difficulty in acertaining the sequence of rendering the data in the 2D display to ensure certain image stay on top. The "overlays" involved allowing the user to switch on/off data (via data references) like coastlines, latlon lines, satallite images, GIF file textures, radar images contour lines, tracks etc. VisAD had all the functionalities for this purpose, but to put them together, there is a need to manage all the individual ScalarMap and ConstantMap mappings, apart from adding GUI controls. For examples, individually added dataReference (by addReferences() or addReference()) may have already added etc etc... How can I help you? cheers Ng Say Teong
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