【摘要】 针对城市环境下车辆的行驶特点,在GPS定位数据的基础上,利用位置择近算法对车辆进行地图匹配估计,使车辆在道路法线方向的定位误差显著减小,误差仅保留在车辆行驶方向的径向分量中。试验结果表明,经地图匹配修正后,车辆运动轨迹的定位精度达到了道路域内,进一步提高了系统的跟踪能力。更多还原

【Abstract】 The vehicles are limited in the roads in urban district.A position-nearness-selecting algorithm is used to realize the mapmatching estimation for vehicle GPS navigation,based on GPS positioning data.As a result,the normal error component of the positioning road is reduced greatly,and the positioning errors exist only in radial component of vehicle’s driving direction.The experiment result shows that the normal position component of the vehicle moving route is positioned in the road fields.The tracking performance of the navigation system is improved.更多还原