实现高斯投影面的正反算，及相关子午线收敛角投影长度比的计算，精度为0.001m，0.0001秒,投影面the pros and cons of the realization of Gaussian operator, and related convergence angle radial projection length calculation, accuracy of 0.001m, 0.0001 seconds

控制测量平面子午线收敛角Control the measuring plane meridian convergence -Control the measuring plane meridian convergence

输入坐标计算，子午线收敛角，大地线长，方向改化等-Input coordinates, the meridian convergence, the earth cable length, the direction of change

计算子午线收敛角，实现三差改正，实现参考椭球与高斯平面上的转换-Calculation meridian convergence and achieve three error correction, to achieve the reference ellipsoid and the conversion of the Gaussian plane