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《Mine Surveying》 2017-04
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Analysis on accuracy of building urban coordinate system based on ellipsoid expansion method

Guan Shangwei;Gansu Province Surveying and Mapping Engineering Institute;  
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 establishing 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.
【Key Words】: ellipsoid expansion method accuracy evaluation edge length check
【CateGory Index】: P226.3
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