支持ITS和LBS的地理数据叫做导航地理数据，简称导航数据。
The geographic data supporting ITS and LBS are called navigable geographic data, which is short for navigable data.
本文主要介绍了汽车导航系统中的导航地理数据库标准、数据结构与数据模型、最优路径三个问题。
This paper mostly introduce three issues of Vehicle Navigation System, that are navigation geographic database standard, data structure and data model, superior road.
而当智能导航技术发明之后，争论很快就平息了，随后就出现了即时地理定位数据设施。
When the killer app of turn-by-turn driving directions was invented, that debate was put to rest and the real time geolocation data infrastructure was born.
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