高速铁路精密投影变形模型研究

High-speed Railway Precision Projection Distortion Model

通过对工程控制网投影变形方法的研究,得出了构造工程椭球与坐标换算的三种计算模型,最后通过对实际数据的计算与分析,总结出构造高速铁路工程椭球的最优方法,从而保证了既有投影面与工程椭球面的最佳吻合。

We put forward three kinds of calculation model for constructing the engineering ellipsoid and coordinate transformation.At last,we summarize the optimal method for constructing the engineering ellipsoid of high-speed railway in order to make sure the best fit of existing projection plane and the engineering ellipsoid.