中文说明：三种大地坐标系：WGS,BJ54 ,GDZ80通过计算转化为三维直角坐标系XYZ，方便相关人员做地形、地质等地学统计分析；计算值可能会有一些误差，但思路和方法可以借鉴，如果有更好的方法和程序，希望各位拿出来分享
English Description：
Three kinds of geodetic coordinate system: WGS, BJ54, GDZ80 transformed by calculating the three-dimensional Cartesian coordinate system XYZ, facilitate personnel do topography, geology and other earth science statistical analysis; Calculated may be some errors, but the ideas and methods can draw on, if there is better methods and procedures, we hope you come to share