利用重力模型进行GIS点群选取

Point Cluster Selection in GIS Using Gravity Model

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。

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 quantita- tively describe the correlation between geographic entities. Moreover, the inertial selection model can not only preserve the main spatial features of the geographic entities after generali- zation, but also takes the influence of correlation between geographic entities on objects se- lection into consideration.