其研究流程图如左示：4.1建立DTM数据库将天目山1：1万地形图数字化,建立数字地形模型(Digitial Territory Mode)。在GIS支持下生成高程图层、坡向图层、坡度图层。
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本文还研究了通过扫描数字化等高线图建立数字地形模型的方法。
The methods to obtain the Digital Terrain Model (DTM) from contour map by scan digitizing were studied.
对构筑三角形网格建立数字地形模型进行了研究，给出了基于散乱点和边建立三角形网格地形模型的生成算法和数据结构。
Generation of triangular meshes for digital terrain model is studied, the triangulation algorithm of discrete points and edges and its data structure are presented.
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