中文说明：本程序设计了常用的几个坐标系的转换，从WGS—84与PZ－90坐标系的相互转换，以及空间直角坐标系与大地坐标系的转换。
English Description：
This program designs the transformation of several common coordinate systems, from WGS-84 and pz-90 coordinate systems to each other, and space rectangular coordinate systems to geodetic coordinate systems.