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。
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.
当前，传统空间数据组织与模型的内在局限性已经不能完全满足大范围甚至全球多分辨率海量数据动态管理的要求。
Currently, traditional spatial data model with the inherent limitations can not fully satisfy the scope of the global multi-resolution massive data dynamic management requirements.
组织模型不仅要支持传统的纵向的组织结构，而且还要支持以团队方式工作的横向组织结构。
Organization model not only contains information about traditional hierarchy structure, but also provide the support of team-oriented collaboration.
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