Database Reference
In-Depth Information
Speed (km/h)
<1.2> “107485_7” t=04/04/2007 06:54:36 @04/04/2007 06:54:26
04/04/2007 07:00
04/04/2007 08:00
04/04/2007 09:00
04/04/2007 10:00
04/04/2007 11:00
246.4
150.0
100.0
50.0
25.0
10.0
5.0
0.0
Clear
107485_ 7
Start date+time
End date+time
ID=107485_ 7
04/04/2007 06:39:36
04/04/2007 07:16:42
Points: 235448; trajectories: 8206 (no filtering)
04/04/2007 00:00:00
05/04/2007 03:58:00
Full extent
Speed (km/h)
04/04/2007 06:30:00
330
04/04/2007 12:00:00
min.
(a)
(b)
Speed (km/h)
246.4
150.0
100.0
50.0
25.0
10.0
5.0
0.0
04/04/2007 07:00
04/04/2007 08:00
04/04/2007 09:00
04/04/2007 10:00
04/04/2007 11:00
Clear
Points: 235448--27342--27342;100%--11.6%--11.6%. Segments: 8206--18329--18329. Trajectories: 8206--6154--6154; 100%--75.0%--75
(c)
(d)
(e)
(f)
360.0
0.0
04/04/2007 00:00:31
05/04/2007 03:12:02
(g)
Plate 8.3 (a) A time bars display shows the speeds by color-coding. Mouse-pointing high-
lights the trajectory and marks the pointed position in a map (b). (c) Trajectory segments are
filtered according to the speed values. (d) Only the segments satisfying the filter are visible
on the map. (e) Low-speed events have been extracted from the trajectories according to
the segment filter. (f) Density-based spatio-temporal clusters of the low speed events are
shown in a space-time cube. (g) A scatterplot shows the times (horizontal dimension) and
movement directions (vertical dimension) of the low-speed events.
