从数字评估模型迭代生成TIN

Michael F. Polis, D. McKeown
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引用次数: 22

摘要

描述了一种从数字高程模型(DEM)生成不规则三角网(TIN)的技术。总体目标是使用从原始DEM中选择的一组大大减少的点来产生一个近似的地形描述,该描述保留了主要的地形特征。TIN的生成过程是迭代的;在每次迭代中,识别出TIN中用户提供的误差容差之外的DEM区域,并从DEM中选择点以更准确地对这些区域进行建模。点的选择包括计算实际DEM和近似DEM之间的差值。这个近似DEM是通过插值来自TIN.>的高程点来计算的
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Iterative TIN generation from digital evaluation models
A technique for producing a triangulated irregular network (TIN) from a digital elevation model (DEM) is described. The overall goal is to produce an approximate terrain description that preserves the major topographic features using a greatly reduced set of points selected from the original DEM. The TIN generation process is iterative; at each iteration, areas in the DEM that lie outside of a user-supplied error tolerance in the TIN are identified, and points are chosen from the DEM to more accurately model these areas. Point selection involves the computation of the difference between the actual DEM and an approximate DEM. This approximate DEM is calculated by interpolating elevation points from the TIN.<>
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