1 | Goal is to provide interactive 2D and 3D viewing of terrain via the Web, with GIS functionality for accessing and overlaying spatially referenced data |
2 | Terrain data is currently elevation plus satellite images; GIS information is place names, census data, images, Web pages, simulation results |
3 | Java (for 2D) and VRML (for 3D) are used to display information and images using the Web |
4 | Need to minimize data transfer from the server in order to obtain real-time performance |