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《Engineering of Surveying and Mapping》 2005-04
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Method of fitting of GPS geoid

YAO Ji-li~1,CHU Li-li~2,YU Zhi-lu~3(1.School of Architecture Engineering,Shandong University of Technology,Zibo,255049,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China;3.Yantai Filiatle of Shandong Zhenyuan Geographic Information Engineering,Yantai 264002,China)  
GPS can provide precise three-dimensional coordinates of the points on earth,and its height is based on ellipsoid.At first,use large number of known point of original data,adopt six parameters method,multi-surface function,movement method and the finite element method of GPS leveling to approximate the abnormal height curved surface of the few check point;then,use few known point of original data to approximate the large number of check point in GPS network.It indicates that movement method and the finite element method which have the subarea nature are better,and the third class leveling combing GPS can replace the fourth class leveling.
【CateGory Index】: P228.4
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