Editing Triangulation station (section)

{{short description|Fixed surveying station used in geodetic surveying}}
{{Use dmy dates|date=December 2023}}
{{Use British English|date=December 2023}}
{{More citations needed|date=July 2012}}
[[File:Sunset Peak Triangulation station in December 2022.jpg|thumb|A trigonometrical station on [[Sunset Peak, Hong Kong]]]]

A '''triangulation station''', also known as a '''trigonometrical point''', and sometimes informally as a '''trig''', is a fixed [[surveying]] station, used in [[geodetic surveying]] and other surveying projects in its vicinity.

The station is usually set up by a mapping organisation with known [[coordinates]] and [[elevation]] published. Numerous stations are installed on [[summit]]s for purposes of visibility and prominence. A graven metal plate on the top of a pillar may provide a mounting point for a [[theodolite]] or reflector, often using some form of [[kinematic coupling]] to ensure reproducible positioning.