多轨迹GPS数据生成高精度列车控制用数字电子地图的方法

采用GPS进行列车定位是一种全新的列车定位方法。而建立生成各个车站和区间的数字电子地图是一项巨大的工程。针对高效率、低成本地生成列车控制用高精度电子地图，提出了多轨迹求径的概念，即利用低成本GPS接收机采集的线路轨迹数据，在关键点（POI点）坐标的约束下，拟合得出线路方程，用以生成数字电子地图。该算法在城市智能交通系统车载导航地图线路更新，未知区域线路探测等领域也有很好的应用前景。

Method of Generating High Precision Digital Map for Train Control Using Multi-trail GPS Data

GPS is a relatively new method of train positioning applications. However there is a large amount of work to build up the digital maps of all the tracks within stations and blocks. How to achieve high precision digital map effectively and economically become a key point. An algorithm named Multi-trail data refinement is proposed in this paper to realize automatic data refinement and updating of the digital map. This algorithm also could be used to update road information in vehicle navigation digital map or to detect road information in unknown area in Intelligent Traffic System.