数字高程模型的建立与分析应用

Establishment and application of digital elevation model

为了用数字高程模型实现区域地形表面的数字化表达,通过对比分析的方法,研究了不规则格网(TIN)和规则格网生成的几种算法,对几种算法进行了比较,同时对数字高程模型的应用进行了分析,结果表明,逐点内插法十分灵活,内插效率较高,精度较高,计算方法简单又不需很大的计算机内存,因此逐点内插法是目前DEM生产中常用的内插方法;随着算法的不断改进和完善,DEM生成效率和精度的提高,其应用前景将十分广阔。

Digital elevation model realizes the digital representation for terrain, Through a comparing analysis, research discusses several arithmetic of establishing TIN and Grid, analyzes the application of them, reaches a conclude that method of interpolating by points is nimble and has a high efficiency and accuracy, whose computing method is simple and needs only a small memory; The DEM＇s application foreground is very prospers with the improved arithmetic and the promoted efficiency and accuracy.