GPS FOR GIS - HOW DOES IT WORK?
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?
- Find a library where document is available. Order URL: http://worldcat.org/oclc/1606878
- This article is based on information first published in GIS Review, Vol. 3, No. 2, Summer 1989, an educational newsletter published quarterly by Land Systems Corporation, a Division of Seacoast Engineering Associates, P.O. Box 496, Greenland, New Hampshire 03840.
Public Works Journal Corporation200 South Broad Street
Ridgewood, NJ United States 07451
- Boston, D
- Publication Date: 1990-4
- Pagination: p. 59, 102
- Public Works
- Volume: 121
- Issue Number: 4
- Publisher: Hanley Wood
- ISSN: 0033-3840
- Serial URL: http://www.pwmag.com
- TRT Terms: Accuracy; Artificial satellites; Benefits; Global Positioning System; Mapping
- Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;
- Accession Number: 00493641
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 30 1990 12:00AM