Abstract: High resolution DEM is created based on original topographical maps of reservoir area. After the quality of DEM is approved reliable, topographic factors analysis, visibility analysis and reservoir volume are achieved based on DEM. To obtain and display water information, 3-dimensional visualization system is designed by combining ASP and VRML.

Key words: Digital elevation model(DEM), 3-Deminsional visualization, Terrain analysis, Virtual reality

摘要： 利用库区纸质地形图建立了高精度的数字高程模型，进行了精度分析、地形因子分析、可视性分析和库容计算。并结合ASP和VRML技术实现了基于网络的三维可视化系统，包括计算结果可视化与查询、图形数据可视化和库区虚拟场景可视化。实现了对深层次水利信息的获取和形象表达。

关键词: 数字高程模型, 三维可视化, 地形分析, 虚拟现实

CLC Number: 

• TP391.41