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The Research on Conversion of GPS Height Based on the Improvement Method of Quadric Surface

LI Ping(Department of Real Estate Administration Lishui City,Lishui Zhejiang 323000,China)  
During conversion of GPS Height,built the equation to calculate parameters of the conversion.Coordinates of known points equations constitute the coefficient matrix.Improves the coefficient matrix by standard-method,then calculating coordinates parameters.Calculation results are more accurate than ones of using coordinate-centric and average-method.
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