大数据小学期
原始地图数据来源 https://overpass-api.de/api/map?bbox=108.914,34.205,109.005,34.285
way.py 筛选地图数据，只保留highway
ptdraw.py 将way上的点扩充,每10m一个采样点,并绘制出来
地图数据可以使用ArcGis预览
| 字段 | type |
|---|---|
| 司机ID | String |
| 订单ID | String |
| 时间戳 | String |
| 经度 | String |
| 纬度 | String |
得到车辆的坐标,时间,速度,方向
key : (time,lon,lat)
value : (speed,direction)
将车辆信息匹配到道路节点上,并按照时间段记录拥堵程度
将车辆匹配到最近的道路节点上,并按照时间段(10min)记录拥堵程度(拥堵系数之和)
如果距离最近的点超过10m，则舍弃这个点
key : nodeID
value : (timeID,v)
key : (nodeID,time)
value : v
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