国家测绘基准“十二五”重大项目的思考

面向中国经济社会的发展,面向空间技术及信息技术的进展,在“十二五”,中国测绘也要从数字化测绘进步到信息化测绘。现代化测绘基准应为用户在我国任何地点、任何时间测定高精度的坐标和高程,提供可靠的地理空间基础框架。在平面基准方面,在采用中国国家2000大地坐标系统的基础上,建立导航卫星国家连续运行站网,以构建有足够数量和合理分布密度的大地坐标框架点,并协助和统领中国各行各业完成向这一地心三维坐标系的过渡;在高程基准方面,应尽快施测国家三期一等水准网,结合GPS水准和卫星测高技术,精化我国现行大地水准面至5′分辨率和cm量级精度。

On the National Projects for Surveying and Mapping Datum in the Twelfth Five Year Plan of China

Considering the rapid development of economy and society in China,as well as the great progress in space and information technology,the digital surveying and mapping towards information surveying and mapping will be carried out in the 12th Five Year Plan of China.In horizontal datum,base on the Chinese Geodetic Coordinate System 2000,the national continuous operation reference station networks should be completed.It is necessary to form the enough and rational distributed control points for the national geodetic coordinate frame,and it can also help all trades and professions to complete the transformation task of geocentric 3D coordination system.In vertical datum,the task for measuring the 3rd National 1st order leveling network should be completed.Combing with GPS leveling and satellite altimeter,the Chinese geoid of 5 resolution and cm magnitude accuracy should be calculated.