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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。
For the current map matching algorithm generally can only correct the orientation of vertical road GPS positioning error, and the direction of the road positioning error correction method is rarely studied only the application of the problem is not ideal, the quantitative analysis of GPS speed According to the relationship between the positioning error and the positioning error, a method of determining the GPS position correction reference is designed. Based on this, a map matching algorithm based on GPS independent positioning is designed, which is mainly used to correct the GPS positioning error in the direction of the extension of the road. Using the measured GPS data of a big city, the above map matching algorithm is verified. The results show that compared with the existing algorithms, the GPS positioning accuracy obtained by the map matching algorithm designed in this paper is obviously improved, which can provide a higher quality information base for GPS data users.