Digital Maps - Guide

by Luca on September 14, 2011 0 Comments
A Global Positioning System, also known as GPS, is a system designed to help navigate on the Earth, in the air, and on water. A GPS receiver shows where it is. It also shows how fast it is moving, which direction it is going, how high it is, and maybe how fast it is going up or down. Many GPS receivers have information about places. GPSs for automobiles have travel data like road maps, hotels, restaurants, and service stations.

The system was created by the United States Department of Defense. In the beginning, it was only used by the U.S. military, but in 1983 President Ronald Reagan made an order to allow anyone to use the system. The first satellite navigation system, Transit (satellite), used by the United States Navy, was first successfully tested in 1960. It used a constellation of five satellites and could provide a navigational fix ...
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