Use RS232 get GPS data, and cover to WGS84 format, and show on google map

WGS84坐标系的英文原版协议标准，需要理解GPS所使用的坐标系的GPS相关人员可以参考-WGS84 coordinates of the English original protocol standards, need to understand the GPS coordinate system used by the GPS-related personnel can refer to the

GPS位置结算中坐标系转换函数，该函数可以将WGS84坐标转换为UTM坐标。-Settlement of GPS location coordinate system conversion function, which can convert WGS84 coordinates to UTM coordinates.