基于单线模型的交通车载电子地图

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。

Traffic vehicle digital map based on single line model

A digital map based on the single line model was developed for in-vehicle navigation systems.In the model,the map data is managed in layers,with nodes to describe intersections,single lines to describe roads,and shaped nodes to describe the road shape.Pairs of ordinal nodes and pairs of ordinal roads are used for traffic restrictions.The map database includes the note array,road array and traffic restrictions array.The model accurately and concisely describes the road network and traffic restrictions.Tests show that this digital map needs less memory and can effectively support routing and route-guidance functions,so the model is appropriate for in-vehicle navigation systems.