Land Surveying and GPS

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

The Global Positioning System uses a network of satellites to precisely pinpoint the device's location on the planet at any moment. GPS uses https://click4r.com/posts/g/14106501/ of trilateration, utilizing the location of several satellites to pinpoint a precise 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 in use. First created by Click for source . Department of Defense as a navigational assist in 1994, today it really is found in many devices, tracking 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 precise coordinates of spatial locations. Exact measurement of the positions is one of the fundamental elements of land surveying. The advantage of is that it is a lot more accurate than hand-measuring these locations. There is some extent of error in every land surveying measurements, due to 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 house, 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 the structure and the measured point; a good surveyor's stake may be removed prior to the land is re-surveyed. The coordinate of a given location on Earth, however, remains the same. Therefore, using GPS as a land surveyor produces measurements that'll be accurate regardless of what happens to the encompassing land.

Although Global Position System receivers allow for very precise measurements, there's still a degree of error involved. A receiver on a tripod will record the positioning slightly differently each 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 group 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 want, 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 working with GPS units has improved steadily.

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Pub: 13 Jan 2024 09:52 UTC
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