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2. Agricultural fencing - Wikipedia

   en.wikipedia.org/wiki/Agricultural_fencing

   The tradition of fencing out unwanted livestock prevails even today in some sparsely populated areas. For example, until the mid-20th century, most states in the American West were called "open range" ("fence out") states, in contrast to Eastern and Midwestern states which long had "fence in" laws where livestock must be confined by their owners.

3. Geofence - Wikipedia

   en.wikipedia.org/wiki/Geofence

   Two geofences defined in a GPS application. A geofence is a virtual "perimeter" or "fence" around a given geographic feature. [1] A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries).

4. GPS animal tracking - Wikipedia

   en.wikipedia.org/wiki/GPS_animal_tracking

   GPS tracking devices may also be attached to domestic animals, such as pets, pedigree livestock and working dogs. Some owners use these collars for geofencing of their pets. [2] GPS wildlife tracking can place additional constraints on size and weight and may not allow for post-deployment recharging or replacement of batteries or correction of ...

5. Electric fence - Wikipedia

   en.wikipedia.org/wiki/Electric_fence

   An early application of the electric fence for livestock control was developed in 1936–1937 by New Zealand inventor Bill Gallagher. Built from a car ignition trembler coil set, Gallagher used the device to keep his horse from scratching itself against his car. [14] Gallagher later started the Gallagher Group to improve and market the design. [15]

6. Nofence - Wikipedia

   en.wikipedia.org/wiki/Nofence

   Nofence is a Norwegian company that makes GPS collars for farm animals (cattle, sheep, and goats) that discourage them from crossing virtual fences. [1] [2] Oscar Hovde Berntsen has been working on the idea of virtual fencing, as an alternative to fixed electric fencing, since the 1990s. [3] Nofence was incorporated in 2011. [3]

7. Cattle grid - Wikipedia

   en.wikipedia.org/wiki/Cattle_grid

   Cattle grid on country road. Cattle grids are usually installed on roads where they cross a fenceline, often at a boundary between public and private lands. [5] They are an alternative to the erection of gates that would need to be opened and closed when a vehicle passes, and are common where roads cross open moorland, rangeland or common land maintained by grazing, but where segregation of ...