A geo-fence is a virtual perimeter for a real-world geographic area. A geo-fence could be dynamically generated—as in a radius around a point location, or a geo-fence can be a predefined set of boundaries (such as school zones or neighborhood boundaries).
The use of a geo-fence is called geo-fencing, and one example of usage involves a location-aware device of a location-based service (LBS) user entering or exiting a geo-fence. This activity could trigger an alert to the device's user as well as messaging to the geo-fence operator. This info, which could contain the location of the device, could be sent to a mobile telephone or an email account.
Geofencing used with locationized firearms can restrict those firearms to fire only in locations where their firing is permitted, thereby making them unable to be used elsewhere.
Geofencing is critical to telematics. It allows users of the system to draw zones around places of work, customer's sites and secure areas. These geo-fences when crossed by an equipped vehicle or person can trigger a warning to the user or operator via SMS or email.
In some companies, geofencing is used by the human resource department to monitor employees working in special locations especially those doing field works. Using a geofencing tool, an employee is allowed to log his or her attendance using a GPS-enabled device when within a designated perimeter.
Geo-fence can be used for location based messaging for tourist safety and communication.
Geofencing, in a security strategy model, provides security to wireless local area networks. This is done by using predefined borders (e.g., an office space with borders established by positioning technology attached to a specially programmed server). The office space becomes an authorized location for designated users and wireless mobile devices.
In 2015, US Senator Charles Schumer proposed a law requiring drone manufacturers to build geofencing constraints into unmanned aerial vehicle navigation systems that would override the commands of the unsophisticated operator, preventing the device from flying into protected airspace.
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- De Lara, Eyal; Anthony LaMarca, Mahadev Satyanarayanan (2008). Location Systems: An Introduction to the Technology Behind Location Awareness. Morgan & Claypool Publishers. p. 88. ISBN 978-1-59829-581-8.
- Anthony C. Ijeh, Allan J. Brimicombe, David S. Preston, Chris O. Imafidon (2009) "Geofencing in a Security Strategy Model." In Global Safety and Sustainability: 5th International Conference Proceedings. Jahankhani, H.; Hessami, A.G.; Hsu, F. (Eds.) p.104-111 © Springer-Verlag Berlin Heidelberg 2009. ISBN 978-3-642-04061-0