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《Developments In Surveying and Mapping》 2002-03
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Research on Formal Description of Directional Relation Based on Voronoi Diagram(Ⅱ)

YAN Hao-wen ①②③ ,GUO-Ren-zhong ②③ (①Lanzhou Railway University,Lanzhou 730070,China;②Wuhan University,Wuhan 430079,China;③Shenzhen Urban Planning and Land Information Centre,Shenzhen 518031,China)  
This paper presents the establishment of formal model of directional relations based on Voronoi diagram and Delaunay triangulation detailedly.The paper describes the logical structure of the model and the process of direction calculation.To demonstrate the correctness,some calculation examples are given,and the advantages and disadvantages are discussed at the end.
【CateGory Index】: P208
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