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《Geomatics and Information Science of Wuhan University》 2008-05
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Method for Constructing the Hierarchical Structure of Contour Lines Based on Constrained Delaunay Triangulation

ZHENG Chunyan 1,2,3 GUO Qingsheng 2,3,4 HU Huake1 XIA Huiqiong4 (1 Department of Geography,Jiaying University,Meisong Road,Meizhou 514015,China) (2 School of Resource and Environment Science,Wuhan University,129 Luoyu Road,Wuhan 430079,China) (3 Key Laboratory of Geographic Information System,Ministry of Education,Wuhan University,129 Luoyu Road,Wuhan 430079,China) (4 State Key Laboratory for Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China)  
In order to identify the proximity relations between the constraining objects,the characters of the constrained Delaunay triangulation which is built while contour lines are analyzed,elevation points and terrain variation lines are constrains,and a detailed classification for edges of the constrained Delaunay triangulation is made,a method for constructing one kind of hierarchical structure of the contour lines is proposed.The technologies on adjusting the direction of the contour line based on this hierarchical structure are studied.
【Fund】: 国家自然科学基金资助项目(40571133);; 地理空间信息工程国家测绘局重点实验室开放研究基金资助项目(200625)
【CateGory Index】: P208
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【Citations】
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【Co-citations】
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1 XU Limin~ 1,2 XUE An~ 2 1.The Key Laboratory for Environmental and Urban Sciences, Shenzhen Graduate School, Peking University, Shenzhen 518055;2.The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871;Terrain Reconstruction from Contours by Skeleton Extraction Using Delaunay Triangulation and Voronoi Diagram[J];Acta Scientiarum Naturalium Universitatis Pekinensis;2009-01
2 XU Limin 1,2 XUE An 2 1.Key Laboratory for Environmental and Urban Sciences,Shenzhen Graduate School,Peking University,Shenzhen 518055;2.Key Laboratory of Water and Sediment Sciences,Ministry of Education,Department of Environmental Engineering,Peking University,Beijing 100871;Terrain Reconstruction from Contours by Skeleton Extraction Using Delaunay Triangulation and Voronoi Diagram[J];Acta Scientiarum Naturalium Universitatis Pekinensis;2009-04
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