滇中引水工程测量中椭球变换方法选定研究

Research on selection of ellipsoid transformation methods for measurement of Water Diversion Project in Central Yunnan

系统地阐述与推导了椭球膨胀法、椭球变形法与椭球平移法3种常用的椭球变换方法,并在云南滇中引水这一典型的高原长距离工程测量中加以应用。针对3种方法进行了椭球参数变化分析、大地坐标变化分析、高斯投影坐标变化分析及长度变形分析,并比较了各种方法的差异性与一致性。分析结果表明,椭球膨胀法之广义微分法适宜作为滇中引水工程测量的椭球变换方法。

Three conventional ellipsoid transformation methods, i.e. ellipsoid expansion method, the ellipsoid deformation method, and the ellipsoid translation method are systematically analyzed and applied to Water Diversion Project in Central Yunnan, a typical long- distance project constructed in plateau. Through the ellipsoid parameters analysis, the geodetic coordinate variation analysis, Gauss projection coordinate variation analysis and length deformation analysis, the differences and commonness of the three methods are summarized. The results show that the generalized differential method of the ellipsoid expansion method is suitable for Water Diversion Project in Central Yunnan.