Discussion on Plane Coordinate Transformation Method of Local Small Area
With the full use of the 2000 national geodetic coordinate system,the original data of WGS-84 geodetic coordinate system,Beijing coordinate system in 1954,Xi'an coordinate system in 1980 and local independent coordinate system need to be converted to the 2000 national geodetic coordinate system.Therefore,the selection of transformation model,the selection of coincidence point,parameter calculation and accuracy evaluation are related to the accuracy of transformation results.This paper briefly describes the coordinate transformation process and discusses the influence of the selection of control points,transformation models and coincidence points on the transformation accuracy in the plane coordinate transformation of local small areas with cases,and draws relevant conclusions for reference.
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