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《Acta Geodaetica Et Cartographic Sinica》 2004-01
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A Displacement of Building Cluster Based on Field Analysis

AI Ting-hua (School of Resources and Environment Sciences, Wuhan University, Wuhan 430079,China)  
The displacement is an important operator in polygon cluster generalization, which aims at resolving the spatial conflicts between neighbor objects. Presents a field analysis based method to deal with the displacement of building cluster, which is driven by the street widening. The compress of street boundary results in the force to push the building moving toward inside and the force propagation is a decay process. To describe the displacement phenomenon above, the field theory is introduced with the representation model of isoline. On the basis of the skeleton of Delaunay triangulation, a geometric construction similar to Voronoi diagram is created and the displacement field is built in which the propagation force is related to the adjacency degree with respect to the street boundary. The study offers the computation of displacement direction and offset distance for the building displacement. The vector operation is performed based on the grade and other field concepts. The algorithm above has been realized in a map generalization system.
【Fund】: 国家自然科学基金资助项目(40101023)
【CateGory Index】: P283
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