关键词: 地图匹配, 智能交通系统, 车辆监控, 车辆导航

Abstract: On the basis of introduction of map-matching problem and the uncertainty of the vehicle location information from the sensor, a real-time map-matching algorithm based on the curve-fitting and quasi-projection is put forward. By introducing isolated point tracking and GPS point of defection filtering, restriction caused by half-baked/incomplete GIS map database and errors in coordinate conversion can be eliminated. This algorithm may reduce operation complexity，and can run normally with incomplete GIS map data and partial traffic network data defections, which has better adaptability in real-time vehicle supervision and navigation system. The experimental results of the practical runs show that the new algorithm has good robustness and real-timeness.

Key words: map-matching, intelligent transport system(ITS), vehicle supervision, vehicle navigation