【摘要】 传统制图综合中针对水系、地貌等不同地理要素的分治策略,往往导致综合后要素目标之间在空间与语义上的冲突。考虑地形与河流之间的空间依赖性,提出一种等高线簇与河网协同的制图综合方法,即利用两种要素目标顶点在约束D-TIN描述下的空间邻近关系,并通过提取和组织谷地等高线弯曲段数据,构建两要素有效协同关系。在此基础上将等高线按所属地形区域划分为不同区段,然后根据河网层次化选取的结果,分别进行针对性的协同化简,确保综合后各条河流仍处于地形谷底位置。试验证明,该方法可有效避免综合后等高线与河流之间的相互冲突,提升制图综合的智能化程度。更多还原

【Abstract】 The defect of the traditional cartographic generalization strategy which processes the map features separately hence often causes spatial and semantic conflicts between different geographical features on the map.Taking into account the spatial relevance between terrain and rivers,a cooperative generalization method which integrates the contour clusters with the river networks is proposed.Using the spatial proximity relations between the vertexes of the above-mentioned two map features in the constrained Delaunay TIN and via extracting and organizing the bends of valley contours,we construct the cooperative relation between the two features.On this basis,we divide contour clusters into different segment types according to the local topography,and then perform the corresponding simplification under the subset of the river networks given by a hierarchical selection method,so as to keep the position of every river of the networks to the bottom of the valleys.The experiment result proves that this cooperative method can effectively avoid the conflicts between the contour clusters and the river networks,and helps to improve the intelligence level of cartographic generalization.更多还原