基于椭球膨胀法建立城市坐标系统的精度分析

Analysis on accuracy of building urban coordinate system based on ellipsoid expansion method

文中以基于椭球膨胀的方法建立城市独立坐标系统,解决大面积控制网建立的局限性,并通过国标规定的内部精度评定以及外部边长检核方法,确定控制网数据处理的可靠性以及椭球膨胀法建立城市独立坐标系统的可行性。

In the paper, the urban coordinate system was established based on ellipsoid expansion method to solve the limitation of large area control network. Reliability of control network data processing and the feasibility of establis- hing urban independent coordinate system by ellipsoid expansion method were determined using the internal precision evaluation and the external side length checking method formulated by the national standard.