基于线/线拓扑关系的局部变化等高线融合  

Local Contour Line Fusion Based on Line/Line Topological Relations

作　　者：邢汉发[1] 周晓光[1] 许礼林[2] 

机构地区：[1]中南大学测绘与国土信息工程系,长沙市麓山南路410083 [2]国家基础地理信息中心

出　　处：《武汉大学学报（信息科学版）》2010年第11期1322-1326,共5页Geomatics and Information Science of Wuhan University

基　　金：中南大学研究生学位论文创新基金资助项目;国家自然科学基金资助项目(40571122);中南大学博士后基金资助项目;国家科技支撑计划资助项目(2006BAJ09B0601)

摘　　要：在基于目标整体交/差的拓扑关系计算模型的基础上,结合等高线融合特征目标"始末交点",用目标整体∩(交)、两个整体目标分别与"始末交点"的\(差)两个集合操作的结果来计算变化前后高程值相等的等高线间的拓扑关系,根据计算结果建立等高线融合的基本规则。基于规则设计并实现了局部变化等高线融合的基本流程。In this paper,a new approach based on whole object is pursued to compute the binary topological relationship between unchanged contour line and changed contour line,in which FL points are introduced,intersection and difference operators are selected from set operators to distinguish the topological relations between neighboring spatial line objects;three types of topological invariants are used for the computational results of set operations： contents,dimension and connectivity-number.Then a computational method of contour line fusion is designed and realized.The proposed approach of contour line fusion is operational;it has been used in the automatization of contour line fusion successfully.

关 键 词：线/线拓扑关系 特征目标 局部等高线融合 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P231.5[天文地球—测绘科学与技术]