坐标转换方案在区域案例中的适用性分析  

Analysis of the Applicability of Coordinate TransformationScheme in Regional Cases

作　　者：羊军晓 夏子钦 严诚坚 YANG Junxiao;XIA Ziqin;YAN Chengjian(Wenzhou Dongou Real Estate Surveying and Mapping Planning Co.,Ltd.,Wenzhou 325088,China)

机构地区：[1]温州市东瓯不动产测绘规划有限公司,浙江温州325088

出　　处：《测绘与空间地理信息》2024年第5期163-165,共3页Geomatics & Spatial Information Technology

摘　　要：坐标系统之间的转换主要以布尔莎四参数的方法进行,这种方法虽然顾及坐标旋转的原理,但转换精度不高,在高精度坐标转换中无法满足要求。通过多项式逼近的方法结合坐标转换原理将其应用到区域坐标转换案例中,并讨论该方法中变换中心的选取方法。根据实例计算,多项式逼近模型在坐标转换中的精度高于布尔莎四参数和七参数,变换中心的选取对坐标转换无实质的精度影响,多项式逼近模型以三次最佳。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 

分 类 号：P226.3[天文地球—大地测量学与测量工程]