摘要
分析了以等高线、高程点和地形突变线为基础建立的约束Delaunay三角网(Delaunay triangulation,DT)的特征,为了识别这些约束目标之间的邻近关系,对约束DT的边进行了详细分类,并按照相关的规则提出了构建等高线层次结构的方法。在此层次结构的基础上,研究了调整等高线走向的方法。
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.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2008年第5期524-527,共4页
Geomatics and Information Science of Wuhan University
基金
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)
关键词
约束DT
等高线的方向
层次结构
constrained Delaunay triangulation
direction of the contour line
hierarchical structure
