Point Cluster Selection in GIS Using Gravity Model

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.