Regional Reference Frame Sub-Commission for Europe

Regional Reference Frame Sub-Commission for Europe

Infobox Union
name= EUREF
affiliation= International Association of Geodesy
members= more than 30 countries
full_name= Regional Reference Frame Sub-Commission for Europe

founded= 1987
office= Brussels, Belgium
people= Carine Bruyninx, Chair of the Technical Working Group
website= []

Regional Reference Frame Sub-Commission for Europe (EUREF) is the sub-commission of the International Association of Geodesy (IAG), part of the Sub-Commission 1.3 ("Regional Reference Frames"), under IAG Commission 1 ("Reference Frames").EUREF deals with the definition, realization and maintenance of the European Geodetic Reference Frame. The goal of EUREF is to establish a unified geodetic datum (ETRS89) and a consistent network of reference stations (EPN) throughout Europe. EUREF was founded in 1987 at the IUGG General Assembly held in Vancouver.


EUREF is driven by a voluntary agreement of scientific organisations and national geodetic/geographic agencies of the member countries, who are willing to replace their legacy national geodetic datums with a unified European Reference Frame and join their national networks of reference stations into a common European network. The mandate of EUREF is to foster and coordinate the activities of the member countries, which are financed and managed on the national level. EUREF realizes and maintains ETRS89, the European geodetic datum, which is to become a single datum used for geodetic applications in all the member countries. A key instrument in maintaining ETRS89 is the EUREF Permanent Network (EPN), a network of reference stations which covers the European continent. EUREF is also working on the European Vertical Reference System (EVRS), which goal is to determine a unified dm-level accurate geoid model and gravity-referenced height system throughout Europe. EUREF coordinates its activities with EuroGeographics.


The activities of EUREF are discussed and decisions are taken at the annual symposium. The last symposia have been attended by more than 120 participants coming from about 30 member countries of Europe. The results of EUREF are available in the symposia proceedings, which contain the presented scientific papers as well as national reports, resolutions and documentation. Current ctivities are governed by the "Technical Working Group (TWG)", which is elected at the symposia and is meeting two/three times a year to manage current activities. The minutes of the TWG meetings are published annually together with the symposia proceedings.

=European Terrestrial Reference System 1989 (ETRS89)=

ETRS89 is a Cartesian ECEF geodetic datum, in which Eurasian Plate as a whole is static. Within Europe, coordinates and maps based on ETRS89 are stable because temporal variations due to the continental drift are minimized. ETRS89 coincided with the global ITRS datum in 1989, hence the name. ETRS89 and ITRS diverge due to the continental drift at a speed about 2.5 cm per year.

European Vertical Reference System (EVRS)

EVRS is a zero-tidal gravity-related height reference system. The EVRS is realized by the geopotential numbers and normal heights of nodal points of the United European Levelling Network 95/98 (UELN 95/98) extended for Estonia, Latvia, Lithuania and Romania in relation to the Normaal Amsterdams Peil (NAP). The geopotential numbers and normal heights of the nodal points are available for the participating countries under the name UELN 95/98 which is now given the name EVRF2000.


There are several projects under development at EUREF.

*"EUREF Permanent Network (EPN)" is the main project of EUREF and a backbone in the maintenance of the .
*"European Combined Geodetic Network (ECGN)" is a research project aimed at high accuracy geoid determination.
*"EUVN Densification Action" studies discrepancies between EUVN (European United Vertical Network) and the gravimetric geoid.
*"Unified European Levelling Network (UELN)" manages the development of the European levelling network.
*"ETRS89 velocity field model" studies residual local movements of the Eurasian Plate relative to ETRS89.

External Links

* [ EUREF home page]

Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Europe, history of — Introduction       history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …   Universalium

  • Official statistics — on Germany in 2010, published in UNECE Countries in Figures 2011. Official statistics are statistics published by government agencies or other public bodies such as international organizations. They provide quantitative or qualitative information …   Wikipedia

  • Generation — For other uses, see Generation (disambiguation). Five generations of one family: in the center, a child; on the far left, her mother; on the far right, the child s grandmother; second from the left, the child s great grandmother; and second from… …   Wikipedia

  • education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …   Universalium

  • India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium

  • Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …   Universalium

  • United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

  • Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

  • Christianity — /kris chee an i tee/, n., pl. Christianities. 1. the Christian religion, including the Catholic, Protestant, and Eastern Orthodox churches. 2. Christian beliefs or practices; Christian quality or character: Christianity mixed with pagan elements; …   Universalium

  • ZIONISM — This article is arranged according to the following outline: the word and its meaning forerunners ḤIBBAT ZION ROOTS OF ḤIBBAT ZION background to the emergence of the movement the beginnings of the movement PINSKER S AUTOEMANCIPATION settlement… …   Encyclopedia of Judaism

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”