中文摘要：

提出一种基于GPS探测车轨迹的大规模矢量路网地图自动生成方法．该方法不需要路网地图的基图，可以只利用GPS探测车在路网中的行驶轨迹，自动将实际路网的真实拓扑结构反映在数字地图上．该方法分三个步骤：首先，实现GPS探测车轨迹数据的大地经纬度坐标到地图城建坐标的转换；然后，利用坐标转换后的GPS轨迹数据生成路网栅格地图；最后，将已生成的栅格路网地图进行矢量化处理．采用真实GPS探测车轨迹数据进行的实际路网自动生成实验表明，该方法能够成功地通过GPS轨迹自动生成路网地图，生成的矢量路网数字地图具有较高的精确度，可以满足交通诱导和汽车导航等系统中数字地图及时、自动更新的应用需求．

英文摘要：

A method is proposed for automatically generating large-scale road-network vector maps based on GPS-probe-vehicle tracks. This method does not need to employ the basic maps of road-network maps, except the tracks formed when GPS probe vehicles are moving in road networks, to reflect the real topology of road networks onto digital maps automatically. The proposed method consists of three steps. First, transform the earth longitude and latitude coordinates of the GPS-track data to the urban map coordinates; then, generate the skeleton map of the road network by using the transformed GPS-track data; finally, perform vectorization processing to the generated skeleton map. The experiments for automatically generating the real road network with the real-world GPS-track data indicate that the proposed method is able to automatically generate road-network maps successfully, and that the generated vector digital map bears high accuracy and can satisfy the application requirement of automatically and timely updating the digital map in vehicle navigation systems, traffic guidance systems, etc.