基于GPS独立定位的道路延伸方向地图匹配算法

针对目前的地图匹配算法普遍只能修正垂直道路方向的GPS定位误差,而对道路延伸方向的定位误差修正方法研究很少,仅有的研究成果应用又不理想的问题,本文通过定量分析GPS速度与定位误差的关系,设计了一种GPS位置修正基准的确定方法,据此设计了一种基于GPS独立定位的地图匹配算法,重点用于修正道路延伸方向的GPS定位误差。运用某大城市的实测GPS数据,进行了上述地图匹配算法的验证。结果表明,相比现有算法,利用文中设计的地图匹配算法获得的GPS定位精度明显有所提高,从而可为GPS数据用户提供更高质量的信息基础。

Map matching algorithm along road based on independent GPS

According to the fact that only GPS errors being vertical roads are amend by most of methods for map matching,and there are too little methods for amending GPS errors being along roads,a method for finding the GPS location references is designed through analyzing the relations between GPS velocities and positioning errors.Then,a map matching algorithm is designed based on independent GPS,the focus lies in improving position precision along roads for GPS positioning errors.The algorithm above is verified with measured GPS data of a big city.The results show that map matching algorithm put forward in this paper can make the position correction precision along roads much higher,which will provide inputting information quality for users of GPS data.