Taking the contour line drawing of triangulation network as the research content,the paper mainly analyzes TIN generation identifying methods and Delaunay triangulation algorithm,contour interpolation generation algorithm on the basis of triangulation network and contour sliding treatment,which has laid a foundation for similar issue research.%以三角网的等高线绘制为研究内容，主要分析了常用于TIN生成的角度判断法和Delaunay三角剖分算法、基于三角网的等高线生成算法以及等高线光滑处理，对同类问题的研究奠定了基础。
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