Dynamic correlation technology of spatio-temporal data

In order to detect the developing and changing relationship of spatio-temporal data,this paper studied the dynamical correlation technology of spatio-temporal data,proposed and implemented a dynamic correlation algorithm and a basic type of spatio-temporal change.This algorithm combined geometrical correlation with attributes correlation to launch matching and detecting changes,so that it matched spatio-temporal data and extracted changes automatically.This algorithm could solve the relationships as one to one,one to multi,multi to one and multi to multi changes,and detect the moving and changing states of spatio-temporal objects.