椭球变形法在独立坐标系建立中的应用  

Application of Ellipsoid Deformation Model in the Establishment of Independent Coordinate System

作　　者：孟静娟 赵辉 耿晓燕 张涛 陈俊英 MENG Jingjuan;ZHAO Hui;GENG Xiaoyan;ZHANG Tao;CHEN Junying(Geodetic Data Processing Centre of MNR,Xi′an 710054,China)

机构地区：[1]自然资源部大地测量数据处理中心,陕西西安710054

出　　处：《测绘与空间地理信息》2024年第6期33-36,39,共5页Geomatics & Spatial Information Technology

基　　金：地理信息工程国家重点实验室、自然资源部测绘科学与地球空间信息技术重点实验室联合基金项目(20210106)资助。

摘　　要：为解决长度变形超限问题,通常在建立独立坐标系时需重新选择参考椭球面,即对基准椭球进行一定椭球变换。作为椭球变换方法的一种,椭球变形法具有可直接利用国家标准大地坐标而无须进行坐标修正,在新参考椭球上进行高斯投影即可获得独立坐标的优势。本文通过详细的理论推导、实例分析,以椭球变形法建立一套独立坐标系,并对建设效果进行评价。结果表明该模型具有计算简便、精度高的特点,对独立坐标系的建立的模型选取具有一定参考意义。In order to solve the problem of length deformation out of limit,the reference-ellipsoid should be re-selected when the independent coordinate system is established,that is,to perform a certain ellipsoidal transformation on the reference-ellipsoid.As one of the ellipsoid transformation methods,ellipsoid deformation model(EDM)has the advantage that it can directly use the national standard geodetic coordinates without coordinate correction,and obtain independent coordinates by Gaussian projection on the new reference-ellipsoid.This paper establishes an independent coordinate system using the ellipsoidal deformation model through detailed theoretical derivation and case analysis,and evaluates the construction effect.The results show that the model has the characteristics of simple calculation and high accuracy,which has certain reference significance for the selection of models for establishing independent coordinate systems.

关 键 词：椭球变形法 长度变形 CGCS2000 独立坐标系 

分 类 号：P227[天文地球—大地测量学与测量工程]