选择不同的相似变换参数首次提出了不用列误差方程和法方程，就能得到转换参数的最小二乘解的重心化模型，并推导出根据重心化参数计算有明确几何意义的参数的公式。-Choose different similarity transformation parameters proposed for the first time do not have columns error equations and Law equation, the center of gravity of the least squares solution model will be able to get the conversion parameters and derived parameters calculated according to the center of gravity of a clear geometric meaning of the parameter of the formula.