Abstract:This paper studies the resolution of the digital terrain model, the selection of reference surface, and their influence on the calculation of speed and precision by RTM. The results show that:1) When using DTM2006.0 as a reference surface, RTM and RET2012 have similar results for mainland areas, while the precision of RTM is not as fine as that of RET2012 and RET2014 for coastal areas; 2) Considering computational efficiency and accuracy, we can use the 7.5″ SRTM for the inner zone with a radius of 50 km, the 15″ SRTM for the outer zone with a radius of 200 km, and choose the RET2012 model data as a reference surface to construct the residual terrain model at the east area of our country.
ZHANG Yongyi,ZHANG Xingfu,ZHOU Boyang et al. The Integral Method and Accuracy Analysis of Residual Terrain Model Height Anomaly[J]. jgg, 2016, 36(9): 770-774.