The
occurrence of state event reflects the instantaneous state of a moving vehicle object, which records data at
this position in the computer, and also takes the time interval of the sampling point when direction or state
changes occur twice as the unit for moving track segmentation and storage. Then sampling time points
when direction or state changes occur to each moving vehicle object can form an X-Y plane at a time.
Meanwhile, segment the cube according to the timeline, which then can be divided into multiple space-
time cube units from the perspective of the timeline. Each space-time cube unit includes at least one track
segment, which is the most basic spatial and temporal range for moving vehicle object research, and
various cube units constitute a spatio-temporal data model of the entire vehicle track data