Adjustment of Triangulation Technique in China Geodetic Coordinate System 2000
MA Xin-ying · Journal of Earth Sciences and Environment · 2009
The old national geodetic control network results belong to reference-ellipsoid-centric Coordinate System (1980 Xi'an Coordinate System) results, but China Geodetic Coordinate System 2000 (CGCS2000) belongs to a geocentric geodetic coordinate system. In order to obtain results in CGCS2000, results in reference-ellipsoid-centric coordinate system should be added several corrections and joined in network adjustment. This paper describes the adjustment of triangulation technique in CGCS2000, the data processing of space network and the data reduction of ground network, and introduces the adjustment model and the method for accuracy estimation. Using the example, adjustment calculation is carried out, and the results are contrasted and analyzed. The experiment is well-tried, and favourable basis is provided for application of CGCS2000.