等高线空间关系研究

Study of the Spatial Relations of Topographic Contour Lines

地形图上等高线相互之间的空间关系是人们分析地形的重要依据,也是利用GIS模拟地形图认知能力的一个重要出发点。在利用计算机模拟人们判读地形图的过程中面临的一个关键问题是:如何在计算机环境下有效地描述、表达及计算等高线空间关系。本文从空间认知的需求出发,在等高线空间关系分类的基础上,利用图论中的树结构(等高线树)形式化表达等高线空间关系,在Voronoi邻近的基础上建立了计算机可执行的等高线空间关系计算方法。

The spatial relations of topographic contour lines play important roles in the process of human analyzing landform, which are also a key factor of making GIS simulate human's capability of cognizing topographic map. Based on spatial relation theory, some issues about the spatial relations of topographic contour lines are studied. The main researches concentrate on the classification of spatial relations of contours, representation and computation of these relations based on contour tree, and computation of the spatial relations on the basis of contour tree.