Abstract: Global positioning system (GPS) is a new way to provide ground control for mapping projects. Quite simply, instead of setting up a tripod and transit over a point, the modern surveyor may elect to set up the tripod with a specialized antenna receiver to monitor satellite signals. With GPS, accurate positions can be determined quickly and easily anywhere on the globe. Although originally conceived for military applications, GPS is available for civilian use. When fully deployed, 18 satellites will circle the earth at orbits of approximately 12,000 miles. They will be distributed to allow at least four satellites to be simultaneously visible from any point on earth 24 hours a day. This article addresses some of the questions asked about GPS, including the following: Why GPS? What advantage does it offer? Should you consider it for your project?
Publication Year: 1990
Publication Date: 1990-04-01
Language: en
Type: article
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