【摘要】 首先简单介绍了航位推算的基本原理,接着分析了在航位推算中存在的必然误差以及累积误差对地图匹配结果的影响,最后重点讨论了如何利用数字地图数据库中已知的道路轨迹和航位推算得出的原始轨迹,在地图匹配中实时修正航位推算的累积误差。作者把此算法运用到“香港消防车第三代调派系统”定位子单元,在香港进行了实地跑车,得到了良好的效果。更多还原

【Abstract】 At first, the paper introduces the fundamental principle of dead reckoning. Then it analyses the inevitable errors in dead reckoning and the accumulative error that affects the map matching results. Finally the paper presents the arithmetic that applies map-matching data to revise the dead reckoning accumulated error. The author applies the arithmetic to subsystem which is the third assign system of fire engine of HK and acquires good results.更多还原