Terrain data is important data source in the 3D geographic visualization system. The key problem to browse global terrain data in network environment is to organize, transform and display data in a quick and efficient way. This paper introduces some of the key techniques in the global terrain visualization. The simplified global terrain data partition and organizing method is adopted. In order to reduce the size of datasets, the human-vision related improved SPHIT wavelet compression method is also introduced in this paper. The experiment shows that these technique solutions are effective to solve the problem in global terrain visualization in C/S mode. 1
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