车载导航技术现状及其发展趋势

随着国民经济的不断发展和人民生活水平的不断提高，人们对交通信息的需求与日俱增。车载导航系统融合了车辆、交通、计算机、通信、系统科学等领域的相关技术，已成为交通导航的重要工具。本文系统阐述了车栽导航系统的定位技术、动态路径规划方法、导航电子地图数据动态维护与更新、交通信息的采集、处理与发布、道路交通状况的预测等关键技术及其在国内外的发展现状．指出了各项技术目前存在的一些缺陷，并展望了车载导航技术的发展趋势。

The Actuality and Trend of In-vehicle Navigation Technologies

With the continuous development of national economy and improvement of standard of living,the people's(demand) of traffic information is on the increases.The in-vehicle navigation systems absorb many related technologies,such as vehicles,traffic,computers,communications,system science etc.And it has become important tool of traffic navigate.This paper expounds many key technologies as orientation technology,dynamic vehicle routing methods,real-time maintenance and update of electronic map,the collection,processing and releasing of traffic information,traffic condition forecast of in-vehicle navigation systems and their develop actuality in home and abroad.It points out some limitations of each technology exist at present,and prospect of the development trend of in-vehicle navigation technologies.