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GPS stands for Global Positioning System which uses a constellation of 32 satellites that transmit precise microwave signals that enable GPS receivers to determine their location, speed, direction, and time. GPS was developed by the United States Department of Defense and is widely used by the general public.

The advent of GPS technology has revolutionized the surveying industry. A typical handheld or car GPS will give someone’s position on Earth with an accuracy of 5 to 10 metres. Surveyors have a developed a methodology that allows them to increase the accuracy to within a few centimetres, so this technology is now widely used in surveying projects.

You want to have fun with GPS? Try “Geocaching” which is an entertaining treasure hunt adventure game for GPS users. People have set up caches all over the world and share their locations on the Internet. Treasure hunters can then search for caches using the coordinates and their GPS receivers. For more on Geocaching, visit: