一种高精度城市坐标系之间的转换方法  

A High Precision Transformation Method Between City Coordinate Systems

作　　者：魏保峰 陈国平[2,3] 李宁 赵文东 WEI Baofeng;CHEN Guoping;LI Ning;ZHAO Wendong(Kunming Surveying and Mapping Institute, Kunming 650051, China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Geospatial Information Interation Innovation for Smart Mines,Kunming 650093,China)

机构地区：[1]昆明市测绘研究院,云南昆明650051 [2]昆明理工大学国土资源工程学院,云南昆明650093 [3]智慧矿山地理空间信息集成创新重点实验室,云南昆明650093

出　　处：《昆明冶金高等专科学校学报》2022年第1期41-47,共7页Journal of Kunming Metallurgy College

摘　　要：目前,城市相对独立坐标系之间转换方法常见的有七参数、四参数、多项式拟合等多种转换模型,各有其一定的优点和适用范围。设计了一种计算最优中央子午线和换带重投影后再进行四参数转换的城市坐标系之间高精度相互转换的方法。经昆明市域国家坐标系与地方城市坐标系之间的相互转换实验结果表明该转换方法内符合和外符合精度均达到毫米级,并通过程序实现了多种格式数据的批量转换,适用于城市独立平面坐标系统之间或与2000国家大地坐标系的相互转换。At present,there are some common coordinate transformation systems,such as seven parameter,four parameter,polynomial fitting,and each has its own advantages and scope of application.In this paper,we design a method of high-precision mutual transformation between city coordinate systems,which calculates the optimal central meridian and reprojection after changing belts,and then performs four parameter conversion.The experimental results of the transformation between the national coordinate system and the local city coordinate system in Kunming show that the accuracy of internal and external coincidence of the transformation method reaches millimetre level,and batch conversion of various formats of data is realized by programing.The method is suitable for the transformation between independent city coordinate systems or the China Geodetic Coordinate System 2000(CGCS2000).

关 键 词：坐标转换 高精度 城市相对独立坐标系 中央子午线 重投影 

分 类 号：P207[天文地球—测绘科学与技术]