大地坐标系统转换问题分析  

Analysis of the Geodetic Coordinate System Conversion Problem

作　　者：罗家望 莫才健[2] 李玉宝[2] LUO Jia-wang;MO Cai-jian;LI Yu-bao(Mianyang Xike Surveying and Mapping Co. Ltd.,Mianyang 621000,China;Southwest University of Science and Technology,Mianyang 621000,China)

机构地区：[1]绵阳西科测绘有限公司,四川绵阳621000 [2]西南科技大学,四川绵阳621000

出　　处：《工程建设与设计》2019年第10期31-32,共2页Construction & Design for Engineering

摘　　要：讨论七参数转换方法应用需要满足的条件,分析大地高误差对转换精度的影响,指出若要其影响忽略不计,大地高精度需要达到厘米级;在转换参数未知的条件下,对在相对地球表面很小的区域,采用公共点计算七种参数方法的可行性提出了质疑。In this paper, the conditions for the application of the seven-parameter conversion method are discussed, and the influence of geodetic height error on the conversion accuracy is analyzed. It is pointed out that if the effect is ignored, the precision of the earth needs to reach centimeter level. Under the condition that the conversion parameters are unknown, the feasibility of using the common point to calculate the seven parameter methods in the region with very small relative surface of the earth is questioned.

关 键 词：大地坐标转换 布尔沙模型 大地高精度 公共点 七参数解算 

分 类 号：P226.3[天文地球—大地测量学与测量工程]