基于IGGIII模型的高精度抗差坐标转换算法研究

Research on Resistance Coordinate Transformation Method of High Accuracy Based on IGGIII Model

针对经典空间直角坐标转换没有考虑公共点坐标精度对求解坐标转换参数的影响,提出了一种基于稳健抗差估计理论的空间直角坐标转换方法,该方法采用IGGIII模型对精度较低或误差过大的公共点重新定权,逐渐降低其在求解坐标转换参数中的作用,进而获得可靠的坐标转换参数。最后利用编制的算法程序对某工程实例中的公共点坐标数据进行计算,结合设计的两个方案对比分析表明本文提出的方法实用、有效,可以达到高精度坐标转换的目的,在实际测量生产中具有一定的推广价值。

A high precision spatial coordinate transformation method based on the robust robustness estimation theory is proposed to avoid the influence of the coordinates of the common point coordinates or the error is too large to solve the coordinate transformation parameters.The method uses IGGIII model redefines the common point with low accuracy or large error,and gradually reduces its role in solving the coordinate transformation parameters,and obtains the reliable coordinate transformation parameters.Finally,the algorithm is used to calculate the common point coordinate data in a project instance.The comparison between the two schemes shows that the proposed method is practical and effective,and can achieve the goal of high precision coordinate transformation.In the actual measurement production has a certain value to promote.