利用重力模型进行GIS点群选取
Point Cluster Selection in GIS Using Gravity Model
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摘要: 在现有GIS点状要素综合选取方法的基础上,针对两种具有相关关系的GIS要素,综合考虑它们的空间与属性信息,运用重力模型对要素间的相关性进行评价,提出惯性选取的方法。实验结果表明,重力模型可以很好地集成地理目标的空间与属性信息,定量描述不同要素之间的相关性;采取惯性选取的方法不仅可以保持目标综合前后空间结构的一致性,而且可以顾及不同地理要素相关性对目标选取的影响。Abstract: On the basis of the existing GIS information generalization method,a method of inertial selection is put forward in view of correlation between point clusters in GIS.The method will allow evaluation of the correlation between geographic entities through a gravity model considering the spatial and attribute information.Experimental results show that a gravity model can solve the problem of spatial and attribute data integration and can quantitatively describe the correlation between geographic entities.Moreover,the inertial selection model can not only preserve the main spatial features of the geographic entities after generalization,but also takes the influence of correlation between geographic entities on objects selection into consideration.
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