Verification Method of Height Survey Results of Sangpile Hydropower Station
This article introduces height survey methods and principles of GPS height conversion in a hydraulic engineering.A method of verifying leveling results reliability using GPS geodetic height conversion to obtain the normal height and elevation difference of bench marks is proposed toward the problems that leveling results are difficult to retest and verify in the areas of higher altitude,large elevation difference and poor traffic condition.The application results indicate that the leveling survey in the engineering is reliable and gross errors are evitable.It also shows that EGM2008 fails to reach its global accuracy in the high mountain area of western Xin-jiang and the overall accuracy of 20cm in mainland of China.However,the method of joint surveying the known elevation points to e-liminate the system error can be applied in the error detection and elevation transmission with low-required accuracy.
万方数据
维普
