一种面向高架区域的GPS导航地图匹配算法
ed positioning point in O(1) time. For improving the accuracies in handling viaduct areas, an algorithm based on fuzzy inference is introduced, which takes four input parameters into account, including angles, projecting distances, the elevations and the reachability. The experiments as applying in the area of Zhong-he viaduct of Hangzhou city shows that the proposed algorithm performs better than the benchmark algorithm.Key words: map matching; grid index; fuzzy inference algorithm; intelligent transportation system0 引言GPS导航地图匹配是交通工程领域研究的关键技术。随着基于浮动车定位的实时路况监测技术的推广,以及大量基于位置的服务的涌现,常用的GPS匹配算法已不能满足精度要求,尤其在高架与路面重叠、交叠、平行等情形下,难以给出高精度的匹配结果。已有的地图匹配方法可粗略概括为:距离匹配法、拓扑匹配法、概率匹配法、高级匹配法四类。距离匹配法利用导航观测点与道路之间的邻近关系,如Bernstein[1]提出的点-点匹配法。拓扑匹配法基于地理实体之间的空间关系,例如 Greenfield[2]
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