摘要
综合利用EGM2008地球重力场模型,采用"移去-拟合-恢复"方法和二次曲面函数数值逼近算法进行GPS高程转换。通过某隧道实例验证了"移去-拟合-恢复"的有效性和实用性,检验了EGM2008地球重力场模型的精度。通过计算比较,在测区范围内,合理选择均匀分布的GPS/水准点,可以使高程拟合精度达到最大。
Utilizing EGM2008 earth gravity model,using remove-polish-restore method and quadric approximation approach for GPS height transformation.Then,the author verified the effectiveness and practicality of the remove-polish-restore method though a tunnel project,as well as the precision of EGM2008 earth gravity model.In addition,we obtained that it can acquire the maximum height transformation accuracy by reasonable choice of GPS/Leveling points in the area though calculating and comparing.
出处
《测绘》
2010年第5期204-208,共5页
Surveying and Mapping