Several combinatorial navigation systems are discussed and compared in the paper . gps / electrical map combinatorial navigation system is selected to complete the design at last . the aim of the design is to design a low cost 、 high practicability vehicle navigation system 本文通过对几种组合导航系统进行分析和比较，选用了gps /电子地图组合系统，主要完成的是车载gps /电子地图组合导航系统的研究与设计，对gps /电子地图组合导航系统进行研究，旨在设计一种成本较低、实用性较强的车辆导航系统。
