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中文摘要：
为同时实现导航系统核心功能，提出了基于功能的导航数据模型，重点论述了该模型中的导航数据的总体组织原则和导航数据组织模型。试验结果表明，提出的数据模型能方便高效地同时实现导航系统的核心功能，适合于导航系统。
英文摘要：
In order to realize the core functions of in-car navigation system, a function based navigation data model is put forward, in which the whole organization principles and organization model of navigation data are addressed. In the whole organization principles, firstly, different scales data are classified into different levels in vertical direction and divided into blocks in horizontal direction. Then the data are organized into map display related levels, route planning related levels and POI related levels. In the data organization model, road data mode is researched in detail, in which map display related model and route planning related model are discussed, as well their supporting to core functions of navigation system. Experiment results demonstrate the data model described is able to synthetically realize the core functions of navigation system in an effect and convenience way, which is fit for navigation system.
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