区域性独立坐标系与三维地心坐标系的转换  

Transformation Between Three-Dimension Geocentric Coordinate System and Independent Coordinate System

作　　者：施一民[1,2] 陈伟[1] 施宝湘[3] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]现代工程测量国家测绘局重点实验室,上海200092 [3]宁波市测绘设计研究院,浙江宁波315041

出　　处：《同济大学学报（自然科学版）》2009年第8期1104-1108,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(40471114)

摘　　要：对于区域性独立坐标系与三维地心坐标系之间的互相转换,提出了一种在GPS网平差中不以54或80国家参考椭球为过渡的平差转换方法.在有条件地通过网平差使全部GPS网点获得精确的三维地心坐标情况下,先基于WGS 84(1984世界大地坐标系)椭球进行椭球变换,再在高斯平面上平移旋转转换,就能方便、精确地将三维地心坐标转换到既有的独立坐标系上.其优点是,在GPS网平差的同时,不仅能实现两种坐标系之间的精确转换,而且能得到供整个测区长期应用的一整套转换参数.类似地,又提出了利用3个重合点在较小区域求定转转换参数的简便实用的方法.A new method of transformation between the three-dimension geocentric coordinate system and independent coordinate system in adjustment of GPS networks is proposed. Compared with the conventional methods, it is not based on the 54 or 80 national reference ellipsoid. In the present technical situation, it＇s easy to get the accurate geocentric coordinates on all control points with GPS. In order to transform the coordinates to the existent independent coordinate system exactly and conveniently, the regional ellipsoid surface approximated to the projection plane is firstly adopted in this mode, and then transformation is realized on Gauss plane. This method not only realizes the accurate transformation between the two coordinate systems, but also provides a complete set of transformation parameters for the whole area for a long period. Analogously it provides also a new simple method which can generate the transformation parameters with 3 known points in the smaller area.

关 键 词：三维地心坐标系 独立坐标系 坐标转换 E3椭球 高斯投影 

分 类 号：P223[天文地球—大地测量学与测量工程]