一种高精度坐标转换新方法

New method of high-precision coordinate transformation

针对最小二乘法解算坐标转换参数易受个别公共点坐标精度影响的问题,利用稳健抗差估计理论将个别坐标精度过低或误差较大的公共点的权值按一定的方式进行调整,降低其在解算过程中的作用,从而解算出高精度坐标转换参数,以进行高精度坐标系统转换。数据计算表明,高精度坐标转换新方法计算结果正确,可以克服个别公共点坐标误差较大的影响。研究表明该方法在实际测量工程中实用、可行。

Aimed at addressing the least squares solution of coordinate transformation parameters sus- ceptible to individual public coordinate accuracy, this paper uses the robust estimation theory to adjust weights of public point with too low individual coordinate precision or a greater error according to a certain way and thus decrease the solution process, so as to produce the high-precision coordinate transformation parameters by which to perform high precision coordinate system transformation. Data calculation shows that high-precision coordinate conversion method, capable of correct calculation, can eliminate the influ- ence of individual public coordinate of a greater error. The study shows that the method can find a feasi- ble application in th~ rn,~,, ~ ~.;^-~_