坐标转换参数不同的求取方式对RTK测量影响的对比分析

The comparative analysis of the effects on RTK surveying due to different methods of deriving the coordinate conversion parameters

随着RTK技术的不断发展,在目前测量中的诸多领域都得到了较为广泛的应用,结合RTK技术的实际应用简单地介绍了椭球体坐标转换及投影方法原理和RTK坐标转换参数求取以及大地高与正常高之间的转换,通过对高程异常值求取过程中存在的一些问题提出了一种似大地水准面模型坐标转换参数求取的方案,并对这种方案在野外进行了实例对比分析。结果表明:这种似大地水准面模型坐标转换参数不仅能有效减轻室内资料处理作业员的劳动强度,且其精度完全能够满足要求。

The RTK technique, along with its continuous development, has been applied widely at present in many surveying fields. This article gives a brief introduction, in conjunction with the practical application of the RTK technique, to the principles and methods of ellipsoidal coordinate conversion and projection, the derivation of RTK coordinate conversion parameters, and the conversion from geodetic height to normal height. The article also put forward, through some of the problems existing in derivation of the height anomaly values, a scheme for deriving the coordinate conversion parameters of the pseudo-geoid model. The scheme has gone through comparison and analysis in field practices. The results show that these coordinate conversion parameters of the pseudo-geoid model cannot only effectively decrease the work intensity of the office data processors but also provide the accuracy completely satisfying the requirements.