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A Geofence is a virtual perimeter on a geographic area using a location-based service, so that when the geofencing device enters or exits the area a notification is generated. The notification can contain information about the location of the device and might be sent to a mobile telephone or an email account.

Geofencing is used with child location services to notify parents when a child leaves a designated area.[1]

Geofencing is a critical element to Telematics hardware and software. It allows users of the system to draw zones around places of work, customers sites and secure areas. These geofences when crossed by an equipped vehicle or person can trigger a warning to the user or operator via SMS or Email. In extreme circumstances the zones can be linked to immobilisation equipment within a vehicle and stop the engine dead.

Other applications include the sending of an alert if a vehicle is stolen[2] and preventing wildlife from straying into farmland.[3]

See also


  1. De Lara, Eyal; Anthony LaMarca, Mahadev Satyanarayanan (2008). Location Sensing: An Introduction to the Technology Behind Location Awareness. Morgan & Claypool Publishers. 88. ISBN 9781598295818. 
  2. "Motorcycle Tracker Updates Every 15 Seconds". Motorcycle USA. 23 January 2009. Retrieved 2009-01-26. 
  3. "Kenya's elephants send text messages to rangers". The Guardian. 11 October 2008.,,-7854133,00.html. Retrieved 2009-01-26.