Research of rough map matching algorithm based on GPS/DR integrated navigation

In the digital map matching, direct projection method is one of the most commonly used methods to determine the vehicle section, it is simple and easy, but stability is poor and matching efficiency is low, cannot satisfy the high stability and accuracy requirements of map matching. This paper based on direct projection method, combines correlation algorithm with probability statistics method, introduces the history matching parameter in matching process to iterative operation, uses multiple sampling points to eliminate accidental error. Through Matlab simulation testing and correct match rate statistical analyzing, the improved algorithm has good stability and compatibility in both timeliness and accuracy rate, can well simulate the rough matching process of real digital map.