车辆监控系统中关于GIS、GPS、GSM关键技术的探讨，对于初学者很有帮助-Vehicle Monitoring System on GIS, GPS, GSM key technical discussions helpful for beginners

道路运输车辆卫星定位系统北斗兼容车载终端技术规范JTT808，GPS国标协议，部标协议。-Road transport vehicle Beidou satellite positioning system is compatible with the vehicle terminal specifications JTT808, GPS GB agreement, the Ministry of standard protocols.