Definitions[]
General[]
Geofencing is tracking people on a mobile subscriber list based on proximity to a particular retail store and sending them tailored messages relating to that store.
Software[]
Geofencing is a feature in a software program that uses the global positioning system (GPS) or radio frequency identification (RFID) to identify geographical locations.
Unmanned aerial vehicles[]
"A geofence uses GPS to check that an unmanned aircraft is within its designated operating area. If the aircraft approaches or exits this area, a return-to-base instruction is automatically executed to bring the aircraft back inside its designated operating area, which is defined by minimum and maximum altitude as well as by lateral (latitude and longitude) constraints."[1]