本文通过综合利用多种软件，对用地形图生成DEM的方法进行了深入的探索。
DEM formation by means of topographic map together with comprehensive use of a variety of software was explored.
讨论了一种基于地形图的纹理映射算法，用以生成地形表面的三维图形。
This paper discusses the algorithm of texture mapping based-on topographic map to produce the 3d images.
收集的地理实况数据包括1：5万的地形图和根据该地形图经数字化处理生成的数字高程模型(dem)。
The collected ground true data includes topography map with scale of 1:50 000 and the corresponding Digital Elevation Model (DEM).
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