Multiresolution Compression and Visualization of Global Topographic Data

摘要: We present a multiresolution model for terrain surfaces which is able to handle large-scale global topographic data. It based on hierarchical decomposition of the sphere by recursive bisection triangulation in geographic coordinates. Error indicators allow representation data at various levels detail and enable compression local omission values. The resulting adaptive stored using bit code underlying binary tree additionally, relative pointers selective traversal. This way, it possible work directly compressed show that significant rates can be obtained already small threshold In visualization application, triangulations consist hundreds thousands shaded triangles are extracted drawn interactive rates.