针对车载导航系统的需要，提出了一种基于单线模式的车载电子地图模型。
A digital map based on the single line model was developed for in-vehicle navigation systems.
车载导航系统是本设计的重要功能组成部分，本文深入讨论了车载定位导航技术的理论基础：全球定位系统GPS与地理信息系统GIS，以及电子地图的表达方式和数据结构。
The automobile navigation system is an important part in this design. This paper investigates GPS location, GIS navigation and description methods and data structure of navigation electronic map.
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