车载导航电子地图中道路数据的空间逻辑描述

道路数据是车载导航电子地图中主要研究的数据，也是智能化交通运输系统（ITS）建立数据框架的基础数据。据此彩地理信息系统（GIS）技术，从逻辑描述方案的角度探讨道路数据的空间逻辑描述、属性描述和速体逻辑关系，以提供恰当的道路逻辑描述方案来建立道路空间数据库，并为道路数据标准化采集提供依据。

Spatial Logical Describing of Road Network in Digital Map for Car- navigation System

The road network data is the key research issue of the digital map for car navigation system.It also has become an important element in today's transportation infrastructure and will play a key role in the evolving technology of intelligent transportation system(ITS).During the research of the digital map for road network,the logical describing of the spatial data is paid great attention because it is a necessary point for the transferring among different spatial road data formats.So the spatial logical representation,attribute describing and logical relationship of the road network is discussed from the point of spatial logical describing in this paper using the technology of GIS.The three-level-representation for spatial road network is given and explained by graphs in order to achieve the good understanding.Then the necessary contents of road attribute data is listed which puts the emphasis on the carnavigation system.Finally,the whole logical relationship among the road network data is given.So the discussions in this paper can help the data collecting of digital road network for navigation,meantime can apply felicitous logical model for the establishment of spatial database and the foundation for the standardization of road network data.