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针对车载导航系统的需要,提出了一种基于单线模式的车载电子地图模型。该模型采用分层管理,对核心的路网结构采用单折线表示道路,节点表示路口,用形值点表示道路的形状,通过有序节点对和道路对的方式来表示交通限制信息。整个地图数据库可以由节点集、道路集和转弯限制集3个集合来描述实现。该模型可以清晰准确地描述道路网络结构及其相关的交通限制信息。试验表明:这种电子地图能很好地支持寻路以及路径导航功能,存储空间较小,非常适合于车载导航使用。
In order to meet the need of vehicle navigation system, a vehicle-mounted electronic map model based on single-line mode is proposed. The model uses hierarchical management. The core of the road network structure using a single line that the road, the node that intersection, with the shape of the value of the point that the shape of the road, and by means of an orderly node on the way to express the traffic restrictions. The entire map database can be node set, road set and turn limit set 3 sets to describe the realization. The model can clearly and accurately describe the network structure of the road and its related traffic restriction information. Experiments show that: This electronic map can well support the routing and path navigation functions, storage space is small, very suitable for car navigation.