Digital navigation map is fundamental part for VNS, so map data actuality will directly exert an influence on navigation accuracy.

导航电子地图作为导航系统的重要基础，数据的现势性如何直接影响到导航的准确与否。

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The principle of loading of digital map in the terrain auxiliary navigation is studied. It is concluded that FDN plays an auxiliary role in the process of loading of digital map.

研究了地形辅助导航中数字地图的加载原理及飞行力学导航法在数字地图加载过程中的辅助作用。

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This algorithm also could be used to update road information in vehicle navigation digital map or to detect road information in unknown area in Intelligent Traffic System.

该算法在城市智能交通系统车载导航地图线路更新，未知区域线路探测等领域也有很好的应用前景。

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Earlier this week, Sina, a leading Chinese online media company, announced a strategic partnership with AutoNavi Holdings Limited, a provider of digital map content and navigation and location-based solutions in China, in an effort to enhance the social, location and mobile offerings of both the companies.

FORBES: Sina Enhances Its Mobile Portfolio By Partnering With AutoNavi