面向等高线与河流冲突处理的多约束移位方法  

A Multi-constraints Displacement Method for Solving Spatial Conflict between Contours and Rivers

作　　者：李国辉[1] 许文帅 龙毅[1] 周侗[1,3] 高朝[1] 

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210023 [2]常州市基础地理勘测中心,江苏常州213003 [3]南通大学地理科学学院,江苏南通226007

出　　处：《测绘学报》2014年第11期1204-1210,共7页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(41171350;41271449;41301514);高等学校博士点基金(20103207110012);江苏省高校自然科学研究项目(13KJB170020)

摘　　要：针对等高线与河流的不一致性问题,以移位等高线匹配河流为出发点,提出一种对每个特征点动态确定仿射变换模型进行移位的方法,该方法综合考虑移位角度比例、地形特征点相对位置、局部形态的保持和变换等因素,对各特征点实时计算其位移的角度、位置和缩放变化等约束,建立其移位模型。试验结果表明,本文提出的方法能够较好地实现等高线到河流的一致性改正,可有效解决等高线与河流数据的空间关系问题。In the process of spatial data integration and matching ,the inconsistency often occurs between the rivers and contour lines that generate some spati al conflicts just like river climbing slope .Aiming to solve the problem by displacing the contours to matching the river network ,this paper put forward a new method for every feature point on contour lines to establish specially its displacement model by affine transformation .The method comprehensively considered relative positions of adjacent ridge and valley points ,the angle proportion of different feature points for displacing and local shape of contours to be maintained and transformed , so that the calcul ation of three constrained parameters determine the displacement of points on the contours that is angle ,location and scaling was proposed .To test the method ,several experiments were taken to analysis .The results showed that the research can effectively complete the displacement of contour lines to match the river network .

关 键 词：空间数据匹配 等高线 河流 移位 

分 类 号：P208[天文地球—地图制图学与地理信息工程]