基于DEM库的地表模型实时简化方法

Real-time Simplification of Terrain Surface based on DEM Database

围绕三维可视化技术中的地表模型简化方法进行了分析与探讨 ,针对传统简化方法中所存在的不足之处提出了一种新的基于 DEM库数据组织的地表模型的实时简化方法 .其主要思想是 :将 DEM库数据组织方法与地表层次细节模型的建立相结合 ,以实现对海量地形数据的实时动态显示 .

In this paper, the simplified technique of Terrain Surface is discussed and a new real-time simplified method based on DEM database is obtained to be a solution to defects of traditional methods. By combining the data organization method of DEM database with methods of Rendering Terrain Surface based on LoD techniques, the real-time dynamic display of gigantic terrain data could be realized.