大地测量中经典的坐标转换小程序，实现了从大地坐标到平面坐标之间的相互转换，有了坐标转换源码，就可以很容易地实现任意投影带的坐标转换。-The classic geodetic coordinate transformation applet, conversion between geodetic coordinates to plane coordinates, coordinate conversion source, can be easily achieved with the coor