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The initial setting operation includes fixing the theodolite on a tripod, along with approximate levelling and centering over the station mark.For setting up the instrument, the tripod is placed over the station with its legs widely spread so that the centre of the tripod head lies above the station point and its head approximately level (by eye estimation).
Adjustments of theodolite may refer to: Permanent adjustments of theodolite; Temporary adjustments of theodolite; See also. Adjustment computations
The pibal theodolite uses a prism to bend the optical path by 90 degrees so the operator's eye position does not change as the elevation is changed through a complete 180 degrees. The theodolite is typically mounted on a rugged steel stand, set up so it is level and pointed north, with the altitude and azimuth scales reading zero degrees.
The permanent adjustments in case of transit theodolite are:- Horizontal axis adjustment. The horizontal axis must be perpendicular to the vertical axis. Vertical circle index adjustment. The vertical circle must read zero when the line of collimation is horizontal. Adjustment of altitude level. The axis of altitude level must be parallel to ...
A total station or total station theodolite is an electronic/optical instrument used for surveying and building construction. It is an electronic transit theodolite integrated with electronic distance measurement (EDM) to measure both vertical and horizontal angles and the slope distance from the instrument to a particular point, and an on ...
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A gyro-theodolite can be operated at the surface and then again at the foot of the shafts to identify the directions needed to tunnel between the base of the two shafts. [7] During the construction of the Channel Tunnel , which runs under the English Channel from France to the UK, gyro-theodolites were used to align the tunnels.
A garbage landslide [1] is a man-made event that occurs when poorly managed garbage mounds at landfills collapse with similar energy to natural landslides.These kinds of slides can be catastrophic as they sometimes occur near communities of people, often being triggered by weather or human interaction. [1]