Manhole cover and trigonometric point Basis Bonn B, Kölnstraße, Bonn, NRW, Germany
Posted by: Maisi2
N 50° 45.427 E 007° 03.961
32U E 363591 N 5624599
he manhole cover is located at Kölnstraße, Bonn, NRW, Germany.
Waymark Code: WMT0WV
Location: Nordrhein-Westfalen, Germany
Date Posted: 09/05/2016
Views: 5
This manhole cover acts at the same time as a trigonometric point of the geodetic baseline "Basis Bonn" (Point B). The Berlin General Staff Officer Johann Jacob Baeyer has used this line as the basis for the triangulation of the Rhineland in the 19th century.