Navit is a open source (GPL) car navigation system with routing engine. It s modular design is capable of using vector maps of various formats for routing and rendering of the displayed map. It s even possible to use multiple maps at a time.

包括了在c#和VB源代码。利用GPS卫星来确定当前位置,原子时间同步电脑时钟,坐标和投影库,本文将教你如何生成自己的地图。-In part one of this series, I described how to write an interpreter for raw GPS NMEA data. Part two described how to monitor and enforce GPS precision data to develop commercial-quality so