Voronoi图的扩展及其在土地定级因素影响半径确定中的应用

研究目的:确定城市土地定级因素的空间影响半径.研究方法:Voronoi图和扩展Voronoi图的空间分割方法.研究结果:(1)对常规Voronoi图进行了扩展,提出了基于矢量数据的Voronoi图生成算法,这种方法可以处理一定尺度空间下的全部点、线、面实体.(2)基于Voronoi图和扩展Voronoi图的空间分割方法解决了传统影响半径确定方法的弊端,能够精确计算出土地定级因素的空间影响半径.研究结论:基于Voronoi图和扩展Voronoi图的土地定级因素影响半径确定方法是进行城市土地定级的一个有效工具.

The Extension of Voronoi Diagram and its Application in Delimiting Influencing Radius of Urban Land Gradation Factors

The purpose of this study is to delimit accurately the influencing radius of urban land gradation factors. Methods of Voronoi diagram and the extended Voronoi diagram were employed. The article extended the practical domain of Voronoi diagram, and presented a vector-based method for generating Voronoi diagram, in which all points, vectors and surface at certain scale can be treated. Finally, a specific method of applying Voronoi diagram to delimit the influencing radius of urban land gradation factors was proposed. With the method of Voronoi diagram, the disadvantages of traditional methods can be removed, and the influencing radius of urban land gradation factors can be figured out accurately. The method of applying Voronoi diagram to delimit influencing radius of urban land gradation proves to be an effective tool.