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What is GPS?
Originally developed by the Department of
Defense, the Global Positioning System (GPS),
was first launched in 1989. 24 NAVSTAR
satellites continuously broadcast time and
position messages, and a network of tracking
stations monitor and control the GPS satellites
in orbit. GPS works using triangulation. A GPS
receiver measures distances from (three or more)
satellites using the travel time of radio
signals and then determines its position by
calculations. Precise to within a few feet for
military uses and about 300 ft (90 m) for
non-military uses, the GPS is used for many
purposes, including navigation, surveying,
tracking vehicles, people & migrating animals,
and plotting the crop yields of small sections
of farmland. |
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Horizontal Control Recovery
Sheets:
Attached recovery sheets are provided as a
source of reference information to Florida
Surveyors and Mappers with the understanding that
it is the responsibility of the user to confirm
the reliability and accuracy of the information.
Lee County does not make any warranties, express
or implied in regard to the accuracy or
reliability of the information contained herein.
For
additional information, please Call 239-533-8502. or
e-mail |
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