基于等高线建立DTM中平坦区域的一种处理方法

A Corrective Method of Flat Region Occurring in DTM Constructed from Contours

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 .在基于等高线生成的三角形网格地形模型中 ,平坦区域不能反映地表真实形状 ,文中给出了平坦三角形的修正方法 .根据这些理论和方法 ,在 Auto CAD R14for Windows环境下 ,用 Microsoft Visual C++4 .2开发研制了应用程序 .

Generation of triangular meshes for digital terrain model is studied, the triangulation algorithm of discrete points and edges and its data structure are presented. Occurring in digital terrain model constructed from contours, the flat region fails to reflect the true shape of the surface, so a corrective method of flat triangles is also provided. According to this approach, a computer program for constructing digital terrain model from contours is developed using Microsoft Visual C++ 4.2 on the AutoCAD R14 for Windows platform.