Abstract：Concerned with truncation error in the earth gravity field model, we calculate the long wavelength high anomaly by the EGM2008 model, the residual terrain model (RTM) high anomaly by the DTM2006.0, the SRTM model and the residual high anomaly by GPS/leveling control points. The accuracy and computational efficiency of the RTM high anomaly model obtained by using different integral radius combination schemes is studied and compared. Finally, the CGGM2015 model and the GPS/leveling points are used to evaluate the geoid model’s accuracy and to verify the results.
