The component parts and main functions of the electronic map system of automobile navigation are analyzed in this paper .

本文分析了车载电子地图系统的组成和基本功能；

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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.

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。

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Required tools: an orienteering map and an automobile that can accommodate a team of four.

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