This archive contains one csv file with 56720 rows.
The presence measurements are based on motion detectors. These motion detectors tag its associated space as occupied if any motion is observed.
Each row indicates an interval where the given Location Name was occupied between Start_Time and End_Time. Thus, time intervals not covered in the CSV imply that the given Location Name was not occupied at those times.
Also, note that Zone may be "undefined" when the given Location Name is either inself a Zone or not associated with any zone.