COMBINED METHOD FOR DATUM TRANSFORMATION CONSIDERINGSTOCHASTIC ERROR AND LOCAL DEFORMATION
Zeng Anmin 1,2) ; and Zhang Liping 2)
1)Institute of Surveying and Mapping of Information Engineering University,Zhengzhou 450052;2)Xi’an Information Division of Surveying and Mapping, Xi’ an 710054
Abstract：The different coordinate systems mean different geophysical concept.In the geodetic network the local deformation and accumulation error exist, and there are stochastic value in the common points with the different coordinate. So the coordinate transformation from low precise coordinate frame to the high one can not approve a high precise reference frame after this transformation. A combined method based on variance component estimation using similarity transformation and regressive approximating is presented.For the local error accumulation and distortion and the stochastic value of the common points, the accuracy of coordinate system is improved after the transformation with the combined method from Xi’an Geodetic Coordinate System 1980(XAS80) to China Geodetic Coordinate System 2000 (CGCS2000).
Zeng Anmin,and Zhang Liping . COMBINED METHOD FOR DATUM TRANSFORMATION CONSIDERINGSTOCHASTIC ERROR AND LOCAL DEFORMATION[J]. jgg, 2012, 32(2): 120-123.
