The Approach of GPS Height Transformation Based on EGM2008 and SRTM/DTM2006.0 Residual Terrain Model
Cheng Liu · Acta Geodaetica et Cartographica Sinica · 2012
The RTM data can be constructed from SRTM and DTM2006.0 global digital terrain model,and RTM height anomaly are computed based on RTM data.Several GPS/leveling points are selected with optimal choice method for constructing the residual height anomaly interpolated model according to their measured height anomaly,EGM2008 height anomaly and RTM height anomaly,and then the accuracy of height anomaly can be improved.Finally two cases of GPS/leveling data are adopted,and the results show that the accuracy of GPS height transformation can be obviously improved using residual height anomaly interpolation based on measured height anomaly,EGM2008 model expanded to 2160 degree and order and SRTM/DTM2006.0 residual terrain model.