Backsighting
Definition
The process of orienting a total station by pointing it at a known reference point (backsight) after setting it over the instrument station. It establishes the angular reference frame so that all measurements are consistent.
Related terms
- Datum peg
- A fixed ground marker with precisely recorded coordinates that serves as the origin point for a site grid. All spatial measurements on...
- Resection
- A method of determining the instrument station's own coordinates by measuring angles and distances to two or more points of known position....
- RTK-GPS
- Real-Time Kinematic Global Positioning System: a satellite-positioning technique where a static base station transmits correction data to a roving receiver in real...
- Site grid
- A rectangular coordinate system established across a site, usually with the origin at a datum peg and axes aligned to magnetic north...
- Total station
- An electronic instrument that simultaneously measures horizontal and vertical angles and distance to a reflective prism, computing three-dimensional coordinates directly. Typical angular...
Explained in
- Total-Station and GPS SurveyThe process of orienting a total station by pointing it at a known reference point (backsight) after setting it over the instrument station. It establishes the...