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《Editoral Board of Geomatics and Information Science of Wuhan University》 2002-05
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Coorelation Analysis of Coordinate Conversion for Digitized Data

YU Xiaohong 1 LIU Dajie 2 (1 Institute of Geodesy and Geophysics,Chinese Academy of Sciences,174 Xudong Road,Wuhan,China,430077) (2 Dept.of Surveying and Geo_Informatics,Tongji University,1239 Siping Road,Shanghai,China,200902) [FK(W6?40ZQ]  
This paper discusses the correlation of digitized map coordinates,and to analyze the digitized coordinate data and the errors strictly,adopts adjustment of condition equations with unknowns to solve coordinate conversion parameters.It applies simulating conversion and affine conversion and analyzes the correlation of coordinates conversed by using four known points and nine known points separately.This paper also discusses the distributing rules of the correlation of the grid points.The discussion shows that the x and y coordinates of the same points are not correlative after coordinate translation,but correlation exists in the x and y coordinates of the different points.The number of the known points and the translating manner by which the conversion parameters were drawn determines the correlation of every point.The square error by using nine known points is smaller than that by using four known points after simulating conversion,when the knows points are the same.The precision of ground coordinate after conversion in affine conversion is lower than that in simulating conversion.With the calculating methods adopted in this paper, the value of the correlation changed from -0.235 3 to 0.542 3 ,which shows that the correlation of the coordinate conversion can not be ignored,and the error analyse should be made on the basis of correlation.
【Fund】: 国家自然科学基金资助项目 (4 0 1710 78)。
【CateGory Index】: P283
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1 LIANG Dan1 TONG Xiaohua1,2(1 Department of Surveying and Geo-informatics,Tongji University,1239 Siping Road,Shanghai 200092,China)(2 Key Laboratory of Modern Engineering Surveying of State Bureau,1239 Siping Road,Shanghai 200092,China);Determination of the Best Optimal Correction Model Based on Kullback-Laible Information[J];武汉大学学报(信息科学版);2011-08
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1 HUANG Jiana 1 LAN Yueming 1 QIN Wenzhong 2 (1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan,China,430079) (2 Dept.of Surveying and Geomaitcs,Tongji University,1239 Siping Road,Shanghai,China,200092) [FK(W15*2。40ZQ];Coordinate Conversion of Map Digitization,Precision and Correlation for Digitized Data[J];武汉大学学报(信息科学版);2001-03
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Chinese Journal Full-text Database 8 Hits
1 TONG Xiaohua1,2 DENG Susu1 SHI Wenzhong3(1 Department of Surveying and Geo-informatics,Tongji University,1239 Siping Road,Shanghai 200092,China)(2 State Key Laboratory for Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(3 Department of Land Surveying and Geo-informatics,The Hong Kong Polytechnic University,Kowloon,Hong Kong,China);A New Least Squares Ajustment Method for Map Conflation[J];武汉大学学报(信息科学版);2007-07
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