Transverse error (measurement)
The transverse error is a critical variable in some measuring methods in geodesy and engineering surveying . It can be perceived by the deviation of the direction measurement. Specifically, it is about the incorrect position of the end point of a route.
The transverse error is caused by inaccuracies in direction measurements, during centering and by other, sometimes instrumental, influences.
For polygons it grows after several viewpoints with the root of the number of points of ( error propagation ). The so-called forced centering can keep the influence of centering errors below 0.1 mm. For this purpose, the theodolite is exchanged for the target or vice versa using several tripods on special bases .