Ads
related to: gyro theodolite surveyingebay.com has been visited by 1M+ users in the past month
geospatial.trimble.com has been visited by 10K+ users in the past month
Search results
Results from the WOW.Com Content Network
In surveying, a gyrotheodolite (also: surveying gyro) is an instrument composed of a gyrocompass mounted to a theodolite. It is used to determine the orientation of true north. It is the main instrument for orientation in mine surveying [1] and in tunnel engineering, where astronomical star sights are not visible and GPS does not work.
A direct-readout theodolite, manufactured in the Soviet Union in 1958 and used for topographic surveying. A theodolite (/ θ i ˈ ɒ d ə ˌ l aɪ t /) [1] is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes.
Instruments used in surveying include: . Alidade; Alidade table; Cosmolabe; Dioptra; Dumpy level; Engineer's chain; Geodimeter; Graphometer; Groma (surveying) Laser ...
The instrument was paid for by the Crown and the King immediately presented it to the Royal Society; for this reason the theodolite is designated as the Royal Society theodolite, or Ramsden RS in short. There is a complete description of this theodolite in the final report of the Anglo-French Survey (1784–1790). [4]
Loops to test survey accuracy may also be made by surveying across the surface between multiple entrances to the same cave. The use of a low-frequency cave radio can also verify survey accuracy. A receiving unit on the surface can pinpoint the depth and location of a transmitter in a cave passage by measurement of the geometry of its radio waves.
Leonard Digges (c.1515 – c.1559) was a well-known English mathematician and surveyor, credited with the invention of the theodolite, and a great populariser of science through his writings in English on surveying, cartography, and military engineering. His birth date is variously suggested as c.1515 [1] or c.1520 (but certainly by 1530). [2]
The theodolite is an instrument used to measure horizontal and vertical (relative to the local vertical) angles to target points. In addition, the tachymeter determines, electronically or electro-optically , the distance to a target and is highly automated or even robotic in operations.
Tacheometry (/ ˌ t æ k i ˈ ɒ m ɪ t r i /; from Greek for "quick measure") is a system of rapid surveying, by which the horizontal and vertical positions of points on the Earth's surface relative to one another are determined using a tacheometer (a form of theodolite).
Ads
related to: gyro theodolite surveyingebay.com has been visited by 1M+ users in the past month
geospatial.trimble.com has been visited by 10K+ users in the past month