Basic HTML version of Foils prepared November 29 98

Foil 5 Collaborative 3D GIS

From 3D Geographical Information Systems in Tango CEWES Tango Training -- November 17-18 98. by Remek Trzaska, Pawel Roman, Chris Walczak, Marek Podgorny


Terrain and other GIS data stored on HTTP server and fetched over the network via HTTP protocol
Handles multiple types of GIS data
  • satellite imagery, topographic maps, various geological characteristics (i.e., vegetation, geological resources, and water concentration) and arbitrary 3D objects are visualized (complete database for NYS).
Wavelet compression for both DEM and satellite images, reduces size of data by a factor of 32 for DEMs and 30-60 for textures.
Adaptive mesh simplification technique results in rendering time reduction by a factor of 40.
Internal caching system with pre-processing
Level-of-detail rendering



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