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《Science of Surveying and Mapping》 2008-03
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An algorithm for irregular triangulated networks restricted by non-convex border

LIU Yong-he,WANG Run-huai,QI Yong-a(Henan Polytechnic University,Jiaozuo 454000,China)  
Most of the terrain regions modeled by digital elevation model(DEM) is compounded ones that include multiple categories of surface features,and not all of the borders of these regions are convex,so regions always restricted by their non-convex borders.Now,most extent algorithms for generating Delaunay triangulated networks can only generate borders that are convex hull of sampled points,but can not create borders of compound regions and the region whose border is not convex.The author modifies the triangle-expanding method and makes it be able to generate irregular triangulated networks from discrete sampled points that are restricted by their border of arbitrary polygon.This new method has the advantage of simple steps,arbitrary border polygon,generating by split and correct adjacent relations.
【Fund】: 国家自然科学基金项目(40572012)
【CateGory Index】: TP391.4
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Chinese Journal Full-text Database 5 Hits
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