剩余地形模型高程异常计算的积分法及精度分析

以构建剩余地形模型高程异常的数字地形模型的分辨率及其参考面的选择为研究对象，系统分析两者对剩余地形模型高程异常计算效率及精度的影响。实验结果表明：1）将DTM2006.0模型作为参考面时，在海岸带区域产生较大的误差，而在陆地与RET2012和RET2014模型的计算结果相差不大；2）在构建我国东部地区剩余地形模型高程异常时，为保证计算效率及精度，计算时内外圈的积分半径分别取50 km和200 km，SRTM数据的分辨率分别采用7.5″和15″，参考面模型使用RET2012。

The Integral Method and Accuracy Analysis of Residual Terrain Model Height Anomaly

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.