Glossaries: G

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Galileo

Developed by the European Union and Space Agency, Galileo is a global positioning constellation of satellites which is still in development and will be made up of 30 satellites (27 operations and thee active spares).


Gateway

A link between two computer systems or programs. This way they can share information with each other. The router for your home Internet is one type of gateway.


General Packet Radio Service (GPRS)

A wireless communications standard on 2G and 3G cellular networks which supports a number of bandwidths and provides data rates of 56-114 kbps. As cellular companies move to more advanced networks, GPRS networks may be more cost-effective for IoT networks.


Geofence

A virtual border applied to a physical space. For example, geofencing might be defined around a nursery, and when a mobile device crosses the nursery boundary, an alert is generated. Geofences may be dynamically created and in a telematics application can encompass entire neighborhoods or cities.


Geographic Information System (GIS)

The combination of hardware, software, and data that captures, manages, analyzes, and presents many kinds of geographic data. GIS and location intelligence applications can be the foundation for location-enabled services.


GeoJSON

A dialect of JSON that describes physical places. Features modeled by GeoJSON are points, line strings, polygons, and multipart groups of these types (MultiPoint, MultiLineString, MultiPolygon). Numerous mapping and GIS software packages employ GeoJSON.


Geotagging

The process of tagging a photo, video, or other types of media with coordinates, thus marking it with a location.


GGSN

Gateway GPRS Support Node (see also SGSN).


GIS

Geographic Information System.


Global System for Mobile communication (GSM)

This is the most widely used digital cellular network and the basis for mobile communication such as phone calls and the short message service (SMS).