逐步详细讨论了进行信息预处理、二维实体环重构和三维实体重构时的关键技术。
The key techniques for information pre-treating, reconstruction of 2D loops and 3D entities are discussed in detail step by step.
简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
本文对HSCAE-3DRF6.0的网格处理所涉及的关键技术模块进行了研究，包括输入文件的形式、二维网格的划分、三维实体网格的划分三个部分。
The key technology of the HSCAE-3DRF6.0 in the meshing part has been discussed in this paper including the types of the input file, the mesh of surface and the mesh of solid.
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