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what is Transit theodolite

 A transit theodolite is a type of surveying instrument that is used to measure horizontal and vertical angles, as well as distances between points. The transit theodolite is similar to a traditional theodolite, but with the addition of a transit mechanism that allows the instrument to rotate about a vertical axis and lock into place when the instrument is level.

The transit theodolite typically consists of a telescope that can be rotated and tilted, a sighting mechanism, a graduated circular scale, and a transit mechanism. The instrument is set up on a tripod and leveled, and is used to sight on a target, such as a stake or a benchmark, to determine the horizontal and vertical angles of the target in relation to the control point. The angles measured by the transit theodolite are recorded and used to calculate the positions and elevations of the targets, and distances between the control point and the targets can also be measured using the instrument.

The transit theodolite is a versatile instrument that is commonly used in surveying, construction, and engineering applications, particularly for the layout and measurement of angles and distances in the field. It is known for its accuracy, durability, and ease of use, and is often preferred over other types of surveying instruments for its ability to quickly and easily determine angles and distances in the field.

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