文章基本信息

标题：Spherical Terrain Rendering using the hierarchical HEALPix grid
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作者：Westerteiger, Rolf ; Gerndt, Andreas ; Hamann, Bernd 等
期刊名称：OASIcs : OpenAccess Series in Informatics
电子版ISSN：2190-6807
出版年度：2011
卷号：27
出版社：Schloss Dagstuhl -- Leibniz-Zentrum fuer Informatik
摘要：We present an interactive spherical terrain rendering system employing a hierarchical subdivision of the HEALPix coordinate system using quadtrees. Compared to other parameterizations, the scheme avoids singularities and allows for efficient fusion of mixed-resolution digital elevation models and imagery. A Level-of-Detail heuristic is used to guarantee both high performance and visual fidelity. Unified treatment of DEM and imagery data is achieved by performing the HEALPix projection within a GPU shader. The system is applied to the exploration of Mars, using both MOLA (NASA) and HRSC (German Aerospace Center) data sets.
关键词：terrain rendering