In
surveying
Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is ...
, the repetition method is used to improve precision and accuracy of measurements of horizontal angles. The same angle is measured multiple times, with the survey instrument rotated so that systematic errors tend to cancel. The
arithmetic mean
In mathematics and statistics, the arithmetic mean ( ) or arithmetic average, or just the '' mean'' or the ''average'' (when the context is clear), is the sum of a collection of numbers divided by the count of numbers in the collection. The co ...
of these observations gives true value of an angle. The precision of the measurement can exceed the
least count of the instrument. used.
The repetition method is used when high accuracy is required. For rough or approximate survey work, the ordinary method of measuring horizontal angles is used as it is less time consuming.
[Surveying Volume 1 by Dr. B.C Punmia, Dr. Ashok Kumar Jain and Dr. Arun Kumar Jain. published by Laxmi publications New Delhi. Retrieved on 6 September 2014]
See also
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Survey camp
Survey Camp is an army tradition that was discontinued in the later part of twentieth century but was reinstated in 2002 across the universities of the world with a whole new structure. It is the civil engineering training course for two weeks usu ...
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Adjustments of theodolite
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Ranging rod
A ranging rod (or range rod) is a surveying instrument used for marking the position of stations, and for sightings of those stations, as well as for ranging straight lines. Initially these were made of light, thin and straight bamboo, or of well ...
s
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Prismatic compass (surveying)
References
{{reflist
Surveying
Civil engineering