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LAND SURVEYING AND GPS

Land Surveying and GPS

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Surveyors

Land surveyors once used tape measures and transits to measure distances and
positions. Because the 1980s, electronic distance measurement, or EDM, devices
have allowed for much more efficient and accurate measurements. These work with
a wave of energy that's shot between your EDM instrument and a reflector. Enough
time the beam takes to return is then calculated as distance. Today, such
calculations can be achieved using sophisticated GPS systems.

Learn more on the network of satellites to precisely pinpoint the device's
location on Earth at any moment. GPS uses the principle of trilateration,
utilizing the location of several satellites to pinpoint an exact location. A
receiver can determine the latitude, longitude, and elevation of a point using
four or more satellites; there are a total of 24 Global Positioning System
satellites currently used. First developed by the U.S. Department of Defense as
a navigational aid in 1994, today it is used in many devices, tracking
everything from cell phones and delivery vehicles to the movement of the
tectonic plates of Earth's crust.

Land surveyors use Global Position Systems to notice the complete coordinates of
spatial locations. Exact measurement of the positions is one of the fundamental
elements of land surveying. Get more information of is that it's much more
accurate than hand-measuring these locations. There's some extent of error in
every land surveying measurements, because of human errors, environmental
characteristics like variations in magnetic fields, temperature, and gravity,
and instrument errors. GPS permits much more precise measurements than
previously available to land surveyors using measuring tape and an angle sight.

Another benefit of the usage of its use as a land surveyor is that the
coordinates can be located precisely, while other methods of land surveying
depend on measurements from other known locations, including the edge of the
property line, the corner of a residence, or another landmark. These locations
could change as time passes, such as in case a house is torn down or another
obstacle is built between your structure and the measured point; even a
surveyor's stake may be removed prior to the land is re-surveyed. Go here of
confirmed location on Earth, however, remains exactly the same. Therefore, using
GPS as a land surveyor produces measurements that'll be accurate whatever
happens to the surrounding land.


Although Global Position System receivers enable very precise measurements,
there is still a degree of error involved. A receiver on a tripod will record
the positioning slightly differently every time; when many measurements are
taken, these data points will form a cluster round the actual location.
Better-quality receivers, needless to say, reduce this level of error.
Survey-grade receivers, rather than those designed for non-surveying uses, may
create a band of measurements clustered within just one centimeter of the
specific location. Today's receivers are steadily gaining used, but is probably
not as accurate as the surveyor would like, especially in areas which are
heavily wooded or that have other large obstructions. However, the technology is
rapidly advancing and gaining a foothold in the available equipment for land
surveyors. Since 1994, the accuracy available when using GPS units has improved
steadily.



Saved by winemouth93

28 minutes ago


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