Definitions for

**"Theodolite"****Related Terms:**Transit, Alidade, Datum plane, Perpendicularity, Vertical plane, Orthogonality, Horizontal plane, Straight angle, Quadrant, Tilt angle, Dip, Vertical angles, Coplanar, Level, Rectangular, Z-axis, X-axis, Protractor, Vertical, Inclinometer, Plunge, Strike, Cartesian coordinates, Y-axis, Orthogonal, Clinometer, Normal, Right angle, Perpendicular, Elevation angle, Cartesian coordinate system, Angle, Angularity, Height, Cartesian plane, Axes, Vertical, Abscissa, Horizontal, Vertical axis, Total station, Acute angle, Y axis, Perpendicular lines, Goniometer, X axis, Triangulation, Obtuse angle, Transverse, Parallelism

An instrument used, especially in trigonometrical surveying, for the accurate measurement of horizontal angles, and also usually of vertical angles. It is variously constructed.

(also "optical transit"): a transit with accurate optical readout of vertical and horizontal angles.

A precise surveying instrument having a telescopic sight for measuring horizontal and vertical angles.

surveying instrument dating from the 16th century, early models of which are generally used for measuring horizontal angles

A surveying instrument used to accurately measure horizontal and vertical angles.

An optical instrument consisting of a small mounted telescope rotatable in horizontal and vertical planes, used to measure angles in surveying, meteorology, and navigation.

Surveyor's instrument used to establish straight lines and for measuring horizontal or vertical angles.

a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod

a a surveyor's instrument for measuring horizontal and usually also vertical angles

a more sophisticated version of a transit

an instrument used in surveying to measure horizontal and vertical angles

a rotating telescope used to measure vertical and horizontal angles

a scientific instrument used for measuring angles (directions) in the horizontal and vertical planes

a small, calibrated telescope mounted on a tripod that surveyors use to measure angles between objects

a standard surveying implement which consists of a sighting device mounted on two scaled bases, one horizontal and one vertical

a triangulation telescope, used to track and measure the angular vertical and horizontal displacement of their target)

a very modern way to survey an area, but surveying isn't new

An optical or radio instrument used to make accurate measurements of vertical and horizontal angles; used in tracking instrument packages on weather balloons and rockets. Optical theodolites use a telescope to aid in tracking.

Precision surveying instrument for measuring horizontal and vertical angles.

A survey instrument consisting of an alidade, telescope, and vertically and horizontally mounted graduated circles, used to measure vertical and horizontal angles. (See alidade and transit).

An optical instrument which consists of a sighting telescope mounted so that it is free to rotate around horizontal and vertical axes, with graduated scales so that the angles of rotation may be measured. Used to observe the motion of a pilot balloon.

surveying instrument for measuring horizontal angles, and perhaps vertical angles, see article on the theodolite.

An instrument designed to measure precisely vertical and horizontal angles.

An optical instrument used to track the motion of a pilot balloon, or pibal, by measuring the elevation and azimuth angles.

an optical instrument used to visually track a radiosonde balloon and determine its bearing and elevation while in flight.

A surveyors instrument for measuring vertical and horizontal angles; a transit.

A surveying tool used in precision work.

A theodolite is an instrument for measuring both horizontal and vertical angles, as used in triangulation networks. It is a key tool in surveying and engineering work, but theodolites have been adapted for other specialized purposes in fields like meteorology and rocket launch technology. A theodolite consists of a telescope mounted movably within two perpendicular axes, the horizontal or trunnion axis, and the vertical axis.