what is non transit theodolite

A non-transit theodolite, also known as a conventional theodolite, is a type of surveying instrument that is used to measure horizontal and vertical angles. Unlike a transit theodolite, a non-transit theodolite does not have a transit mechanism and is therefore not able to rotate about a vertical axis or lock into place when the instrument is level.

The non-transit theodolite typically consists of a telescope that can be rotated and tilted, a sighting mechanism, and a graduated circular scale. 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 non-transit theodolite are recorded and used to calculate the positions and elevations of the targets.

The non-transit theodolite is a basic and simple instrument that is commonly used in surveying, construction, and engineering applications, particularly for the measurement of angles in the field. Although it is not as versatile as a transit theodolite, it is still a useful and accurate instrument for many surveying and construction tasks, and is often used in conjunction with other types of surveying instruments to obtain complete and accurate survey data.

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