Examples, occupancy and dwell
How long do people stay, and how many at once?
A zone records entries, exits, the length of every visit and how many objects are inside at each moment. The same measure times a queue, a waiting area, a room, a parking bay or a pet on a sofa.
Switch the video off to see only what the run stored.
Centre floor over the clip
Objects inside the zone, recomputed from the run’s zone entry and exit events. Hover or focus a stretch of the line for its times.
Centre floor: 7 completed visits, the longest 2.4 s, mean 1.4 s; at most 3 people inside at once; occupied for 7.4 s of the 49.7 s clip.
Every visit
| Anonymous track | Entered | Left | Stayed |
|---|---|---|---|
| #1 | 00:02.3 | 00:04.5 | 2.17 s |
| #3 | 00:16.3 | 00:18.3 | 1.92 s |
| #2 | 00:16.4 | 00:17.1 | 0.67 s |
| #6 | 00:29.4 | 00:31.8 | 2.42 s |
| #4 | 00:29.8 | 00:31.0 | 1.25 s |
| #5 | 00:30.3 | 00:30.8 | 0.50 s |
| #7 | 00:44.3 | 00:45.3 | 0.92 s |
How a visit is decided
A person is in the zone when the bottom centre of their box, where they stand, is inside it. A visit ends when they leave, when the tracker has not seen them for its lost-object time, or when the run stops.
Exits shorter than the zone’s allowance (here 0.5 s) keep the visit going, so someone stepping out for a moment is one visit, not two. A minimum visit length and a limit on occupancy can turn long waits or crowding into their own events.
Reproduce it
- Draw a zone that follows the floor, as in guide 09.
- Record every wait longer than a limit with a rule, as in guide 10.
- Split a floor into zones and compare them with guide 12.
This run uses the route-choice sample scene, whose zone covers the middle of the floor; guide 09 draws a larger zone, so its numbers differ.