高度信息在立交桥地图匹配中的应用

Application of height information to overpass map matching

二维车辆导航系统没有融入高度信息,在处理立交桥路段的地图匹配时有准确性差和实时性不高的缺陷,这些缺陷很难通过提高电子地图和GPS接收信号的精度来得到改善。研究提出将高度信息应用到立交桥路段的地图匹配算法,实验结果表明本算法的匹配准确性在90%以上,判断平均用时缩减为原来的1/2,错误纠正平均用时缩减在6s以内。

Two-dimensional Navigation System did not integrate height information and it had some shortcomings like poor accuracy and low real-time performance in dealing with overpass map matching. These shortcomings were very difficult to he improved by increasing the accuracy of electronic maps and GPS signals. An algorithm in which height information was applied into overpass map matching was proposed. Experiments verified the following facts： map-matching accuracy was increased up to 90%; average judgment time was decreased to half; errors were corrected within 6 seconds.