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。
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。
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。
The accurate, real-time and comprehensive navigation data is the soul of navigation electronic map.
准确、实时、全面的导航数据是导航电子地图的灵魂。
Navigation apps consume lots of data when they retrieve map images, up to a Megabyte a minute.
导航应用程序在搜索地图照片时会消耗大量数据，每分钟达到1兆字节。
The user can rapidly download the data of electronic map relevant to the course this time through data service end of map and get the convenience of dynamic navigation.
用户可以通过地图数据服务端快速下载于本次行车路径相关的电子地图数据，获得动态导航的便利。
In ground vehicle navigation system with GPS, it is necessary that data in GPS receivers be displayed on the digital road map in real time.
在GPS地面车辆导航系统中，需要将GPS接收机收到的数据在电子地图中实时地显示出来。
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。
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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