论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。

In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.

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介绍了通过离散高程点，创建DEM，自动生成等高线的程序设计方法。

Establishment of DEM and program design method of isohypse produced automatically by discrete spot height are presented.

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在基于等高线建立的数字高程模型TIN中，由平坦三角形连接成的平坦区域不能真实地反映地表的真实形状，需要进行适当地修正。

IN TIN of digital elevation model constructed from contours, flat areas which are made up of flat triangles can not reflect the real shape of the surface, so that they need be corrected properly.

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