测绘科学技术学报Issue(1)：8-12,5.DOI:10.3969/j.issn.1673-6338.2014.01.003
地形可视域的TIN切片计算方法
Slicing Calculation Method of Terrain Viewshed Based on the TIN
摘要
Abstract
TIN could be regarded as the rough expression of landform approximation. According to this characteris-tic two kinds of slicing calculation method to calculate viewshed approximately were put forward in this paper. Through the analysis of the influence factors of viewshed error the slicing calculation method had been optimized and the realization process had been given. Combined with the actual landform TIN data an exact algorithm and two kinds of slicing algorithm before and after the optimization had been compared and evaluated on the error meas-ure and running time the conclusion that the optimized rotating slicing algorithm was superior to other approxima-ting viewshed calculation methods was gained furthermore its operating efficiency was higher than the known accu-rate calculation methods in the range of necessary error.关键词
不规则三角网/可视段/可视域/切片算法/异或长度/时间复杂性Key words
TIN triangulated irregular network/visible lines/viewshed slicing calculation methods/exotic length/time complexity分类
天文与地球科学引用本文复制引用
孙永,王青山,吴官祥..地形可视域的TIN切片计算方法[J].测绘科学技术学报,2014,(1):8-12,5.基金项目
国家自然科学基金项目(41104047)。 （41104047）
