中文说明：在GPS的呀你就过程中经常要用到坐标转换，该程序包含了WGS84、NEU以及直角大地坐标系的相互转化，并经过多次调试。
English Description：
In the process of GPS, you often need to use coordinate conversion, the program includes WGS84, neu and rectangular geodetic coordinate system conversion, and after many debugging.