Detecting the geometric difference between the road networks has a realistic significance on the data update, data compression and quality check in navigation map.

道路网信息几何差异的检测在导航电子地图数据更新，数据压缩和质量检查中具有重要的现实意义。

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Artificial data map is an important part of the terrain aided navigation system.

人工数字地图是地形辅助导航系统的重要组成部分。

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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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From March 2010, all new Nokia GPS-enabled smartphones will come installed with the new Ovi Maps application and pre-loaded with local country map data and walk and drive navigation with access to location-aware Lonely Planet and Michelin travel guides at no extra cost.

ENGADGET: Nokia offering free turn-by-turn navigation on smartphones globally (updated)

Meanwhile, Dutch satellite navigation company TomTom, which provided the data for the new map system, told CNN it is not responsible for the way the maps work.

CNN: Users: Apple iOS 6 maps are a mess