Réseau Européen Unifié de Nivellement
Réseau Européen Unifié de Nivellement ( REUN ; German Uniform European Leveling Network) is a superordinate network of European precision leveling and was formed from around 1955 from selected first-order leveling lines from the states of Central and Western Europe.
These lines were initially 100 to 200 km apart, covering the continent like a grid. The mediating adjustment did not take place in height values themselves, but through geopotential levels in order to strictly take into account the influence of the gravitational field. The accuracy of the elevation network is around 10 cm across the continent.
Around 1990 the elevation network was compressed to a mesh size of around 50 km, expanded to include a number of countries and transferred to today's United European Leveling Net (UELN).
See also
literature
- Wolfgang Torge : Geodesy , chap. 7.2 Height networks , de Gruyter textbook, 2nd, completely revised and expanded edition, De Gruyter , Berlin / New York 2003 ISBN 3-11-017545-2
- Heribert Kahmen : Applied Geodesy; Surveying , 20th edition, Gruyter, 2005, ISBN 9783110184648