本文分析了车载电子地图系统的组成和基本功能；
The component parts and main functions of the electronic map system of automobile navigation are analyzed in this paper .
电子地图是车载定位定向系统中的重要组成部分。
Electron map is an important part in vehicle position and azimuth determines system.
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.
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