摘要
简要介绍2008年7月1日启用的中国地心坐标系统2000(CGCS 2000)的定义及其采用的大地测量基本常数,并对CGCS 2000的坐标框架进行了评述:它应该是高精度,涵盖全部陆海国土,动态,具有方便用户的密度和分布,它由全球导航卫星系统国家级连续运行站网和国家高精度大地控制网这两部分组成。目前的框架由2000国家GPS大地网和它与全国天文大地网联合平差的成果构成,可以满足近期的需求。采用CGCS2000后将引起中国境内地面奌的大地经纬度值、高斯平面坐标值、地图上点间的方向和长度值等的变动,本文给出了相应的变动值和应对的基本思路。
The definition and geodetic fundamental constants of Chinese geocentric 3D coordinate system（CGCS 2000） is concisely introduced, which will be employed since July 1,2008. The corresponding coordinate frame with CGCS 2000 is reviewed. The necessary conditions for the national frame to realize the CGCS 2000 include two parts. The first one consists of enough number, propriety density and high accuracy of national GNSS continuous operation stations, and second one is the national geodetic control network with high accuracy. For the time being the national frame only consisted of 2000 national GPS network and the national astro-geodetic network batch adjusted with the GPS network mentioned above. The customers may be satisfied with frame in recent years. The influences on the current existing Chinese maps caused by the change of the coordinate systems, such as the changes of latitude, longitude, Gauss plane coordinates of the surface points and their projection on the map, as well as the variation of the orientation and the length of the lines between the points on the map （including map outlines） are discussed, and the fundamental way to deal with it is introduced.
出处
《测绘学报》
EI
CSCD
北大核心
2008年第3期269-271,共3页
Acta Geodaetica et Cartographica Sinica
关键词
大地基准
坐标系统
坐标框架
大地测量基本常数
CGCS
2000
坐标变换
连续运行参考站
点位变动
geodetic datum
coordinate system
coordinate frame
geodetic fundamental constants
CGCS 2000
coordinate transformation
Continuous Operating Reference Station（CORS）
changes of point position
