联合Delaunay三角网的等高线群综合研究  

Research on Contour Group Generalization Based on United-Delaunay-Triangulation Model

作　　者：杨英伟 罗娟 

机构地区：[1]重庆数字城市科技有限公司,重庆400020 [2]重庆市东部新城(鱼嘴组团)建设管理委员会,重庆401133

出　　处：《地理空间信息》2010年第2期34-36,共3页Geospatial Information

基　　金：国家基础测绘科技计划资助项目(1469990324231);国家自然科学基金资助项目(40571135)

摘　　要：采用"联合Delaunay三角网"来提取成组等高线的弯曲,在弯曲处利用平三角形连接法进行局部地形结构线的连接,并建立起地形结构线的树状结构。运用方根模型确定谷地选取的数量指标,并提出了一种新的数学模型以确定谷地选取的质量指标,完成等高线群的自动综合。研究和实验表明,该方法充分顾及了地貌形态特征,谷地选取合理,概括程度适当,并完全避免了相邻等高线相交,综合效果较好。Extracts curves of groups of contours using ＂United-Delaunay-Triangulation model ＂ （UDT in brief）. At these curves, joins the local topgraphic structures by ＂Flat-Triangle-Jion-Method＂, and builds the ＂Tree Form Structure＂ of topgraphic structures. Using ＂Square Root Model＂ to determine the quantitative indicator of valley-selection, proposed a new mathematic model to determine the quality indicator of valley-selection, complete the contour automated generalization. Research and experiments show that this method fully takes into account the geomorphie characteristics, valley selection is reasonable, simplification degree is appropriate, and completely avoid the intersection of adjacent contours. The generaliation result is satisfactory.

关 键 词：等高线自动综合 地形结构线 DELAUNAY三角网 方根模型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]