Map matching method for annular road section

The invention discloses a map matching method for an annular road section, and the method specifically comprises the following steps of detecting whether a GPS point is in the annular road section, and if yes, matching the road section corresponding to the GPS point based on space analysis, time analysis, direction analysis and voting score. According to the method, on the basis of a space-time and direction analysis function map matching method (STD-matching), a local track sequence direction analysis method is adopted to judge whether to enter the annular road section, and the GPS point candidate road section frequency voting analysis is added, so that the probability of matching a wrong road section is reduced, and the accuracy is improved. 本发明公开一种环形路段的地图匹配方法，具体如下：检测GPS点是否处于环形路段，若检测结果为是，则基于空间分析、时间分析、方向分析及投票得分来匹配该GPS点对应的路段。该方法在时空、方向分析函数地图匹配方法(STD-matching)的基础上，采用局部轨迹序列方向分析方法判断进入环形路段，还添加GPS点候选路段频率投票分析，减小匹配到错误路段的概率，提高准确度。