a virtual boundary created around a delivery vehicle at a predetermined distance from the vehicle's current position
A (typically) user-defined fixed enclosed area on a map (ie. a boundary ) eg. used to initiate an action/signal if the ‘geofence' is crossed by the target (often referred to in AVL and asset-tracking applications.)
An imaginary boundary set which contains a GPS device - if that GPS device exceeds the boundary, an alarm is activated.