提出一种基于多层dem与似三棱柱体元(QTPV)的混合三维数据模型。
A hybrid 3d spatial data model based on multi-DEMs and quasi tri-prism volume (QTPV) is proposed.
矿山地质三维数据模型是实现矿山3D GIS的基础，也是矿山3D GIS研究的重点和难点。
Three-dimensional data model of geology in mine is the foundation of mining 3D GIS, and also the keystone and difficulty in the studies of GIS.
地下水运动三维可视化的关键技术是对三维数据模型构造、网格数据的自动生成以及三维数据可视化集成。
The 3D-Visualization key techniques of groundwater movement are the three dimensions data model construction, mesh data automatic creation and three dimensions data visualization integration.
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