各坐标系之间相互转换，如：WGS84，BJ54，XA80和经纬度在不同带区进行转换。-Conversion between various coordinate systems, such as: WGS84, BJ54, XA80 and the latitude and longitude in different bands for conversion.

WGS-84坐标系与北京54坐标系的转换-the conversion between WGS-84 coordinate syetem and BJ-54 coordinate system