Federal Agency for Cartography and Geodesy

Resolutions of EUREF Symposia

related EVRS

A. Resolution No. 3
of the EUREF Symposium in Warsaw, 8 - 11 June 1994

The IAG Subcommission for the European Reference Frame

recognizing the close relationship of vertical datum problems to EUREF activities and

considering the proposal of the EUREF Technical Working Group to respond to an urgent request of CERCO for a European Vertical Datum at the 0.1 m level

recommends

  • that the Technical Working Group undertakes action and reports at the next meeting
  • an enlargement of UELN to Eastern Europe for this purpose

requests the Eastern European agencies to make their national data available for UELN-CRCM Data Centre at Hanover within 1994.

B. Resolution No. 2
of the EUREF Symposium in Helsinki, 3 - 6 May 1995

The IAG Subcommission for the European Reference Frame

noting the resolution No. 3 of the EUREF Warsaw Symposium in 1994 and

taking into account the principals of EPTN and EUVERN (first term for EUVN) proposals presented during this meeting

recommends that a European Vertical Reference Network (EUVN) should be defined as part of the EUREF network with stations co-located with the European levelling or tide gauge networks

asks the EUREF Technical Working Group to organize the determination of the EUVN:

  • by co-ordinating as many EUREF permanent GPS stations as possible
  • by implementing a suitable GPS campaign to obtain a first epoch determination of all the EUVN stations as soon as possible.

C. Resolution No. 2
of the EUREF-Symposium in Ankara, 22 - 25 May 1996

The IAG Subcommission for Europe (EUREF)

recognized that this Subcommission includes the responsibilities of the former UELN Subcommission

and noting the increasing need for a unified European height system at the decimetre level

decides to realise such a system through the conversion of the future UELN95 results from geopotential numbers to normal heights.

D. Resolution No. 3
of the EUREF-Symposium in Ankara, 22 - 25 May 1996

The IAG Subcommission for Europe (EUREF)

noting the efforts of the European Vertical GPS Reference Network (EUVN) Working Group

endorses their proposal to have a GPS campaign between the 21 and 29 of May, 1997

and urges all EUREF member countries to make their best endeavours in ensuring the success of this campaign.

E. Resolution No. 4
of the EUREF-Symposium in Ankara, 22 - 25 May 1996

The IAG Subcommission for Europe (EUREF)

recognizing the progress of UELN95, the forthcoming EUVN GPS Campaign, and the requirements for a continental vertical reference system at the centimetre level

decides to develop a new European geokinematic height reference network with all available kinematic observations (e.g. GPS, levelling, tide gauges, gravity)

urges all EUREF member countries to deliver relevant data to the data centre, Institut für Angewandte Geodäsie (IfAG)

and asks the Technical Working Group to form a special Working Group to oversee the development of the computation method and methodologies.

F. Resolution No. 3
of the EUREF-Symposium in Bad Neuenahr-Ahrweiler, 10 - 13 June 1998

The IAG Subcommission for Europe (EUREF)

recognizing the outstanding success of the European Vertical Reference Network 97 (EUVN97) GPS Campaign

thanks the EUVN working group and all the contributors to the campaign

accepts the adjustment presented at the symposium and asks the Technical Working Group to derive the final EUVN97 GPS co-ordinates from this adjustment and

urges all EUREF member countries to submit the requested levelling/gravity and tide gauge data, to the data centre in order to achieve the EUVN objectives.

G. Resolution No. 4
of the EUREF-Symposium in Bad Neuenahr-Ahrweiler, 10 - 13 June 1998

The IAG Subcommission for Europe (EUREF)

recognizing the progress of the UELN95 project work

asks the data centre and Technical Working Group, to make the solution presented at the symposium, available as the UELN98

solution and

urgently requests the participating countries to make the missing levelling data available, particularly to extend and improve the vertical network to the Black Sea, around the Baltic Sea and including the channel tunnel connection between France and UK.

H. Resolution No. 1
of the EUREF-Symposium in Prague, 2 - 5 June 1999

The IAG Subcommission for Europe (EUREF)

noting resolution 3 of the EUREF-Symposium 1998 in Bad Neuenahr-Ahrweiler

accepts the GPS frame of the European Vertical Reference Network 1997 (EUVN97) as class B standard (about 1 cm at the epoch of observation), and

endorses these results as improvements and extensions to EUREF89.

I. Resolution No. 5
of the EUREF-Symposium in Prague, 2 - 5 June 1999

The IAG Subcommission for Europe (EUREF)

recognizing the progress in the UELN95 and EUVN as static height networks,

accepts the concept of an integrated kinematic height network for Europe proposed by the Technical Working Group (e.g. GPS permanent stations, repeated levellings, tide gauge observations, repeated gravity measurements)

asks the Technical Working Group to send a circular letter to the EUREF community detailing the proposal and requirements, and seeking participation in all topics (measurements, computing centre, test area).

J. Resolution No. 3
of the EUREF-Symposium in Vienna, 1 - 4 June 2005

The IAG Reference Frame Sub-commission for Europe (EUREF)

acknowledging

the efforts of the European National Mapping Agencies (NMAs) in contributing to the Unified European Levelling Network (UELN) and European Combined Geodetic Network (ECGN) projects for the current European Vertical Reference System (EVRS) realisation

and noting

the need for a new realisation of EVRS

asks

NMAs to provide any new levelling data for UELN2006 and information on national height reference and ECGN points for the new EVRS realisation

– owners of absolute gravimeters involved in ECGN to provide the meta data information of their gravity measurements to the ECGN working group and to make available the campaign data files from their own data base.

K. Resolution No. 3
of the EUREF-Symposium in London, 6 - 9 June 2007

The IAG Reference Frame Subcommission for Europe (EUREF)

considering

the urgent request of the European Commission for the definition and realisation of a pan-European vertical reference system for the referencing of geographic information

and noting

that the definition of the European Vertical Reference System (EVRS), as accepted at the EUREF 2000 Symposium, does not comply with this request

and further considering

that the latest realisation of the EVRS, as the United European Levelling Network 1995/1998 (UELN95/98), was published in January 1999 and also that the progress in national levelling data information makes possible an improved realisation of the EVRS

requests

that the TWG prepares the technical specifications for a new EVRS and its realisation (EVRF2007).

L. Resolution No. 3
of the EUREF-Symposium in Brusseles, 18 - 21 June 2008

The IAG Reference Frame Sub-commission for Europe (EUREF)

recognising

the requirement of the European Commission for harmonisation of the vertical reference system for geo-information

noting

the availability of a new realisation of the European Vertical Reference System (EVRS) in agreement with the EVRS2007 conventions

recommends

to adopt this new realisation of the EVRS under the name EVRF2007 and to exchange the results between all participating countries and

proposes

to the European Commission that this solution is adopted as the vertical reference for pan-European geo-information.

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