1)Department of Survey Engineering and Geomatics,Central South University,Changsha 410083;2)Key Laboratory of Precise Engineering Surveying and Deformation Hazard Monitoring, Universities of Hunan Province, Changsha 410083
Abstract：The 2D Vondrak filter combined with the multisurface function was used in the height anomaly fitting.The experimental result shows that it is a practicable method in the height anomaly fitting.Compared with the multisurface function fitting method,the accuracy have been greatly improved to 76.4% at most.The standard error has decreased up to 54.72%.
