摘要
介绍了一种具有真实感的三维地形模型光照显示的新方法，给出了相应的构建多精度数字高程模型ＤＥＭ的步骤，并讨论了适应三维地形模型光照显示的消隐、可见性测试、光照模型、浓淡处理等处理算法和方法，此外还讨论了适合微机动态显示三维地形模型的方法。
A New Method of three dimensional terrain model of illumination and dynamic display proposed by the authors, which is the most realistic. The procedure of created different level of detail DEM are given, and processing algorithm and methods appropriate to 3 D terrain model, such as illumination model, hidden surfacese limination, visibility test and shading, are disscussed. Furthermore, dynamic display method of 3 D terrain model appropriate to micro-computer is also discribed in this paper.
出处
《地理科学》
CSCD
北大核心
1999年第2期147-151,共5页
Scientia Geographica Sinica
基金
国家自然科学基金
关键词
数字高程模型
地表面元
光照模型
动态显示
GIS
Digital Elevation Model
Landsurface cell
Illumination model
Dynamic display
