大样本量地图匹配方法研究

为保证GPS浮动车交通信息采集与预测的精度,采用直接投影算法,即点到线地图匹配算法来进行大样本量的GPS浮动车数据的地图匹配.文章以唐山市为例,在MapInfo图层中绘制唐山电子路网图以及路网中的GPS点,利用MapX控件将图层插入到VB可视化语言环境下进行编程、运行,通过道路搜索、估算投影点坐标、判断投影点是否在选定道路上,最后利用VB中的循环语句来将唐山市电子地图中的大样本量GPS点完全匹配到电子线路中,实现点到线的完全匹配.

Study on Match Method of Large Sample Volume Map

In order to ensure GPS floating car traffic information and the precision of the prediction, this article used direct projection algorithm, which used the point to the line map matching algorithm for large sample size of GPS floating car data of map matching. Taking Tangshan city as an example, this article drew Tangshan electronic map in the MapInfo layer, and put layer into VB environment with MapX. Through road searching, estimating the projection point＇ s coordinates, judging whether the projection point was in the road, and using VB language, large sample volume GPS points map matching perfectly could be achieved, which could achieve point to the line an exact match.