Surveying Glossary — Letter T

Tacheometry is a rapid surveying method that measures distances and elevations using telescopic instruments with stadia hairs to determine horizontal and vertical angles.

Terrestrial Laser Scanning is a remote sensing technology that uses ground-based laser instruments to capture precise three-dimensional coordinates of objects and terrain surfaces.

A precision optical instrument used to measure angles and distances in surveying, mapping, and construction projects.

The process of measuring horizontal and vertical angles using a theodolite, a precision optical instrument essential for surveying, construction, and geodetic applications.

Tilt compensation is an electronic correction mechanism in surveying instruments that automatically adjusts measurements to account for deviations from the vertical or horizontal plane caused by instrument inclination.

Time of Flight (ToF) measurement is a surveying technique that calculates distance by measuring the time required for an electromagnetic signal to travel from an instrument to a target and return.

Time to Fix GNSS refers to the duration required for a Global Navigation Satellite System receiver to calculate an accurate position fix after being powered on or after signal loss.

MAGNET is integrated field-to-finish surveying software by Topcon that streamlines data collection, processing, and delivery for professional surveyors and construction professionals.

A detailed graphical representation of terrain and landscape features showing elevation, natural and man-made structures using contour lines and standardized symbols.

A comprehensive surveying method that measures and maps the natural and artificial features of land, including elevation changes, terrain, and ground-level objects, to create detailed topographic maps.

A total station is an electronic surveying instrument that integrates a theodolite, electronic distance measurement device, and computer processor to measure angles and distances for mapping and surveying tasks.

The systematic process of positioning, leveling, and calibrating a total station instrument at a survey site to ensure accurate angle and distance measurements.

A conformal map projection that rotates the standard Mercator projection 90 degrees to minimize distortion along a central meridian, widely used in surveying and mapping systems worldwide.

A surveying method that establishes a series of connected survey stations along a path to determine positions and create maps of land areas.

A surveying method that establishes control points by measuring angles and distances within a network of triangles to determine precise horizontal positions.

A tribrach is a three-legged mounting adapter that connects surveying instruments to tripod heads, enabling precise centering and leveling of theodolites, total stations, and GNSS receivers.

Trigonometric leveling is a surveying method that determines height differences between points using vertical angles and slope distances measured with instruments like total stations.

Trilateration is a surveying method that determines the precise location of a point by measuring distances from three or more known reference points.

Trimble Business Center is a cloud-based project management and data processing software platform designed for surveyors, engineers, and construction professionals to manage surveying data, coordinates, and field operations.

The slowing of electromagnetic signals as they travel through the Earth's troposphere, causing measurement errors in GNSS and surveying observations.

A specialized surveying method used to establish precise horizontal and vertical control, measure cross-sections, and monitor alignment during tunnel construction and excavation projects.

A surveying technique where measurements are taken on both faces or sides of an instrument to eliminate systematic errors and improve accuracy.