基于CORS框架城市三维大地测量基准维护的探讨

The Discussion of Urban 3D Surveying Datum Maintenance Based on CORS Framework

介绍了城市三维大地测量基准维护的核心任务是获取基于ITRF框架的精确三维地心坐标,并由此求取到现有城市独立坐标系之间的精确转换参数。以SZ-CORS框架网为例,阐述了基准维护应采用"从框架网到次级网,从相对坐标修正到绝对坐标修正"的思路。利用具体数据验证了城市三维大地测量基准维护方案的可行性。

In this paper,the core task of urban 3D geodetic reference surveyiy is to obtain 3D geodetic coordinate which based on ITRF framework.And then the accurate transformation between that and the independent ones can be stroked.Suzhou CORS frame network is used as a example to illustrate the ideal which datum maintenance should adopt ＂from the first-stage network to the sub-network,from the relative coordinate revise to the absolute coordinate revise＂.Specific dates are used to verify the feasibility of urban 3D geodetic surveying datum maintain program.