A Study of Transformation of GPS Heights to the Taiwan Height System by the Robust Estimation

• Main Author: 游政恭
• Other Authors: 尤瑞哲
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/35534179657844027542

碩士 === 國立成功大學 === 測量工程學系 === 87 === In general,the height of a terrestrial point may be determined by the spirit leveling or the trigonometric methods. Both methods may take so much time and effort in the field work that the surveyors have the heavy loading. Due to the easy operation,using the GPS measurements to obtain the heights has been widely put to use in recent years. The reference surface of the GPS ellipsoidal heights is different from that of the spirit leveling heights. To efficiently use the results of measurements by GPS,especially the height information,this research tries to use the geometric interpolation and the robust estimation to integrate GPS ellipsoidal heights into the present Taiwan height system. To discuss the practicability,the simulated networks and practical experiments are analyzed. It is shown that the accuracy of the transformed heights is ±3.8mm√K . Finally,the reference surface of the present Taiwan height system using the trigonometric height data and GPS data has been also determined.