GPS (Global Positioning System)
A system of satellites around the Earth that broadcast the time via radio signals based on an internal atomic clock. GPS devices can receive the signals from multiple satellites, and by measuring the time it took the signal to arrive they can determine your current position on the Earth.
GPRS (General Packet Radio Service)
A mobile phone 2.5G technology that allows short bursts of data between a phone and a network such as the Internet. The short transmissions allow for less costly connectivity than a constant connection, but work best with specialized services designed for such types of communication.
GIS (Geographic Information System)
A system for capturing and manipulating data relating to the Earth. A common use of GIS is to overlay several types of maps (for example, train routes, elevation data, street maps) to determine useful data about a given geographic area.
A system of satellites around the Earth that broadcast the time via radio signals based on an internal atomic clock. GPS devices can receive the signals from multiple satellites, and by measuring the time it took the signal to arrive they can determine your current position on the Earth.
GPRS (General Packet Radio Service)
A mobile phone 2.5G technology that allows short bursts of data between a phone and a network such as the Internet. The short transmissions allow for less costly connectivity than a constant connection, but work best with specialized services designed for such types of communication.
GIS (Geographic Information System)
A system for capturing and manipulating data relating to the Earth. A common use of GIS is to overlay several types of maps (for example, train routes, elevation data, street maps) to determine useful data about a given geographic area.
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