Database Reference
In-Depth Information
(a)
(b)
Time filter
04/04/2007 00:00:00
05/04/2007 03:58:00
04/04/2007 06:30:00
30
min.
04/04/2007 07:00:00
(c)
(d) (e)
Figure 8.1 Visualization of trajectories: map and space-time cube. (a) 8,206 trajectories of
cars are shown on a map as lines drawn with 5% opacity. (b) The map shows only positions
and movements from a 30-minute time interval selected by means of a temporal filter (c).
(d) A space-time cube (STC) shows a subset of trajectories selected by means of a spatial
filter (e).
