TerraVision, part of DARPA's MAGIC project, was developed to demonstrate a high-speed, wide-area IP/ATM network for real-time terrain visualization and high-speed distributed storage systems.  Running on an ImmersaDesk, users roam in real time about a 3D landscape, created from elevation data and registered aerial images and comprised of a TB of data.  TerraVision is built using VRML 2.0, enabling users with VRML browsers to visualize large datasets from remote locations.