轨迹数据仓库 急!!
我现在要做个RFID数据仓库建模,偏重轨迹数据仓库(trajectory data warehouse),是关于一个校车轨迹的,收集了几辆校车的轨迹数据如下:The structure of each record is as follows:
{obj-id, traj-id, date(dd/mm/yyyy), time(hh:mm:ss), lat, lon, x, y}
where (lat, lon) is in WGS84 reference system and (x, y) is in GGRS87 reference system.
请问要是建星型模型的话,事实表和维度表应该怎么建啊,我是新手,麻烦各位高手指教!!