Roanoke, VirginiaDownload Roanoke7.zip ... This geosimulation of the Roanoke, Virginia (USA) area demonstrates the use of adjacent terrain surfaces to create a virtual terrain mosaic. Each terrain represents the ground surface over half of the area (north and south). Each terrain has a complete color-shaded relief texture and two partial texture layers. The partial texture layers are extracts of color digital orthophoto quadrangle images with 2-meter spatial resolution, providing a virtual image mosaic covering the central part of the scene. The source imasges for the orthophotos were acquired as 1-meter MrSID compressed files, which were used directly in the TNTmips Landscape Builder to create partial texture layers as lossy-compressed JPEG2000 (JP2) files. Without the JPEG2000 compression this geosimulation would be much larger.
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