The European Terrestrial Reference System 89
(ETRS89) is used as the standard precise GPS coordinate system throughout Europe. Supported by
and endorsed by the EU, this reference system forms the backbone for all geographic and geodynamic
projects on the European territory both on a national as on an international level.
The ETRS89 is maintained by the IAG sub-commission EUREF
and it is accessed through the EUREF Permanent Network (EPN), a science-driven network of continuously operating GPS reference
stations with precisely known coordinates in the ETRS89.
All contributions to the EPN are voluntary, with more than 100 European
agencies/universities involved, and the reliability of the network is based on
redundancy and extensive guidelines guaranteeing the quality of the raw GPS data to
the resulting station positons. Next to its key role in the maintenance of the ETRS89,
the EPN data are also used for a wide range of scientific applications such as the
monitoring of ground deformations, sea level, space weather and numerical weather
This web site is part of the EPN Central Bureau Information System, providing both
EPN member organizations and the public with information about the EPN organization,
the EPN network of stations, and EPN data & products.
Whenever your use of EPN data or products results in a publication, please include a