改建城市控制网的探讨与实践  

Study and Practice on Realization of Modernized Construction for Urban Control Network

作　　者：施一民[1] 施宝湘[2] 曹学礼[2] 王勇红[1] 张旭东[2] 何文峰[2] 

机构地区：[1]同济大学测量系现代工程测量国家测绘局重点实验室,上海200092 [2]宁波市测绘设计研究院,浙江宁波315041

出　　处：《工程勘察》2006年第1期52-54,共3页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目(40471114);地球空间环境与大地测量教育部重点实验室开放研究基金项目(03-04-02)

摘　　要：阐述了进一步实现城市控制网现代化建设的目标和原则,提出在有条件的大城市中宜先建立基于ITRF的三维地心坐标系,并由此而精确地转换到已有的相对独立的平面坐标系统。据此在宁波市进行了实践,实现了GPS附合网真三维平差,转换模型中采用了与城市投影面最优拟合的区域性椭球面,并据此开发研制了相应的GPS networks平差转换新软件。按这种不同于常规的数据处理方法所得到的2004年宁波市基本控制网的结果,圆满地达到了预期目的,并已作为正式成果使用。In this paper, both the goals and the principals in modernized construbtion of urban control network are presented. As a new idea useful for some big cities, 3D coordinate system based on the international Terrestrial Reference Frame （ITRF） should be established first, then the transformation between that and the independent ones can be done accordingly. Ningbo city was taken for case study, the 3D adjustment of GPS network with many fix points was achieved there. The regional ellipsoid surface approximated to the projection plane was adopted in transformation model. And the new software for adjusment and transformation of GPS network was developed thereby. The results of Ningbo fundamental control network obtained by this new idea should be satisfied.

关 键 词：城市控制网 三维附合网平差 独立坐标系 区域性椭球面 

分 类 号：P221[天文地球—大地测量学与测量工程]