基于数字高程模型的水库三维可视化分析

Analysis on Three-dimensional Reservoir Visualization Based on Digital Elevation Model

以某水库CAD地形图为原始数据建立了高精度的数字高程模型,并进行了精度分析、地形因子分析、可视性分析和库容、淹没面积计算.应用GeoVRML技术完成了网络虚拟地理信息系统的构建,研制了计算结果可视化与查询、图形数据可视化、库区虚拟场景漫游等功能,实现了对深层次信息的挖掘和远程可视化表达.结果表明,在高精度的数字高程模型基础上能够实现三维可视化分析、计算等功能,有利于空间数据的压缩并应用于W ebG IS的发布.

High precision digital elevation model was created based on original CAD relief map of one reservoir,and the precision,topographic factors and visibility,were analyzed and reservoir volume and submerge acreage of this reservior were computed.Then adopting GeoVRML technique,virtual reality geographical information system of web was constructed,and some functions of this system were developed,such as visualization and query of result,graph data visualization,and region virtual scene roaming,etc.,deep administrative levels information digged and long-distance visualization expression were realized in this system.The result shows that,based on the basic high precision digital elevation model,such functions can realized,as 3-dimensional visualization analysis and calculation functions,ect,these benefit for compressing the space data to release in WebGIS as well as.