基于CGCS2000的2000天津城市坐标系建立  

The Establishment of 2000 Tianjin Urban Coordinate System Based on CGCS2000

作　　者：周大山[1] 张志全[1] 汪伟[1] 周洪月 ZHOU Dashan;ZHANG Zhiquan;WANG Wei;ZHOU Hongyue(Tianjin Institute of Surveying and Mapping,Tianjin 300381,China)

机构地区：[1]天津市测绘院有限公司,天津300381

出　　处：《城市勘测》2024年第3期72-75,共4页Urban Geotechnical Investigation & Surveying

基　　金：天津市规划和自然资源局项目“天津市现代测绘基准升级改造工程”,该项目获得“2020年地理信息产业优秀工程金奖”。

摘　　要：天津市上一代城市坐标系为1990年天津市任意直角坐标系,该坐标系精度较差,已无法满足天津城市建设发展需求,因此天津市亟须建立新一代城市坐标系。本文结合天津市地理特点,确定了坐标系建立过程中的投影方式及中央子午线的选取原则,经试算,最终确定了坐标系参数,建成天津市新一代城市坐标系——2000天津城市坐标系。The previous generation of urban coordinate system was the 1990 Tianjin arbitrary rectangular coordinate system,which has poor accuracy and can no longer meet the needs of urban construction and development of Tianjin,so Tianjin urgently needs to establish a new generation of urban coordinate system.Based on the geographical characteristics of Tianjin city,this paper determined the projection method and the principle of selecting the central meridian in the process of establishing the coordinate system.After trial calculation,the parameters of the coordinate system are finally determined,and the new generation of Tianjin city coordinate system--2000 Tianjin city coordinate system is built.

关 键 词：独立坐标系 投影变形 CGCS2000 中央子午线 抵偿高程面 

分 类 号：P226.3[天文地球—大地测量学与测量工程]