期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2009
卷号：XXXVIII-4/W10
出版社：Copernicus Publications
摘要：A new algorithm for reconstructing contour map from raster DEM data is presented. It runs completely within the programmable 3D visualization pipeline in real-time. During the rendering, we first make an elevation gradient map out of original terrain vertex data. Then figure out the final contour lines with image-space processing, and blend the values on the original scene to obtain the final scene with contour map. We implemented this method in our global 3D-digitalearth platform, with interactive frame-rates and high image quality
关键词：Contour Map; Contour Lines; 3D terrain; GPU; Digital earth
