EUVN - European Vertical Reference Network The initial practical objective of the EUVN project is to unify different European height datums within few centimeters. In addition this project is to prepare a geokinematic height reference system for Europe and to connect…

EUVN-DA In­tro­duc­tion EUVN-DA EUVN as starting point Project Target Related EUREF Resolutions EUVN-DA In 2003 the EUREF Technical Working Group (TWG) has launched the EUVN Densification Action to establish a continental homogeneous GPS / levelling database…

Prod­uct de­scrip­tion A common Excel worksheet has been elaborated and distributed for the NMAs as the general data exchange and evaluation format. The final EUVN-DA worksheets include the checked and analysed GPS and levelling data provided by the countries.…

Da­ta sub­mis­sion EUVN-DA data requirements EUVN-DA data sheet Database overview EUVN-DA data requirements Site selection mean site separation: 50 - 100 km a UELN benchmark should be located within 10 km select levelling benchmark when feasible GPS data cutoff: < 15…

Na­tion­al ref­er­ence frames and geoid mod­els It is a well-known fact that the national height systems in Europe refer to different datums and standards and therefore differ at the decimeter or meter level (see the example in the Figure below or Height datum…

Da­ta anal­y­sis Levelling data GPS coordinates GPS / levelling height anomalies Statistics of the geoid comparisions Levelling data The submitted levelling data (geopotential differences or normal / orthometric heights) are checked and evaluated at the EUVN / UELN…

Sup­port­ing in­sti­tu­tions The following organisations supported the EUVN-DA project. Country Organisation Austria BEV - Bundesamt für Eich- und Vermessungswesen (Federal Office of Metrology and Surveying) Belgium NGI - Nationaal Geografisch Instituut (National…

Height Da­tum Re­la­tions The vertical datum of a height reference system is usually determined by the mean sea level, which is estimated by one or more tide gauges of an adjacent sea. The tide gauge stations of the national height systems in Europe are located at…

EUVN-DA - EUVN Densification Action The project EUVN-DA (European Vertical Reference Network - Densification Action) project has been organized to establish a dense continental homogeneous GPS / levelling database. The main target is to support the European geoid…

References of EVRS For references of EVRS see the following sub-topics: Res­o­lu­tions Def­i­ni­tions Bib­li­og­ra­phy Pa­pers