For the transformation between coordinate systems is mainly carried out using the Bursa four parameter method.Although this method takes into account the principle of coordinate rotation,the transformation accuracy is not high and cannot meet the require-ments in high-accuracy coordinate transformation.This paper applies polynomial approximation method combined with coordinate transformation principle to a case of regional coordinate transformation,and discusses the selection method of transformation center in this method.According to example calculations,the accuracy of the polynomial approximation model in coordinate transformation is higher than that of the Bursa four parameter and seven parameter models.The selection of the transformation center has no substantial impact on the accuracy of coordinate transformation,and the polynomial approximation model is cubic optimal.
关键词
布尔莎四参数/布尔莎七参数/坐标转换/多项式逼近
Key words
the four parameters of Bursa/the seven parameters of Bursa/coordinate transformation/polynomial approximation
维普
万方数据