At first,use large number of known point of original data,adopt six parameters method,multi-surface function,movement method and the finite element method of GPS leveling to approximate the abnormal height curved surface of the few check point;then,use few known point of original data to approximate the large number of check point in GPS network.

Based on the construction of sensors spatial coordinate systems model,with the help of 6-parameters conversion method,leica AXYZ industrial measuring system and transfer coordinate system,this paper realizes the calibration of space relationship of GPS coordinate and LS coordinate.