Li Chunhua 1,3) ; Huang Dingfa 1) ; Luo Zhicai 2) ; and Deng Fang 3)
1)School of Civil Engineering,Southwest Jiaotong University,Chengdu 6100312)School of Geodesy and Geomatics, Wuhan University, Wuhan 4300793)Chengdu City Institute of Surveying and Investigation, Chengdu 610081
Abstract:By use of 10 314 discrete gravity data, 211 GPS/ leveling data, digital terrain model with 30″×30″ resolution and global earth’s gravity field model WDM94,the quasigeoid of Chengdu with 1′×1′ resolution, is constructed with removerestore technique. The modeled geoid heights are tested with observed 20 GPS/ leveling data that were not applied to the construction of Chengdu quasigeoid. The test results show that the standard deviation of the differences is ±0.009 m. The systematic bias of the two traditional vertical network was detected and analyzed by use of Chengdu quasigeoid.