The projection is called ETRS-GKn, where n is the
latitude of the central meridian, for example ETRS-GK27.
13 zone system of 1°-width (19°,
The origin of the coordinate system is in the
cross of equator and the central meridian of the zone. False
easting of 500 000 m is used in order to avoid negative coordinate
on ETRS89 with GRS80-ellipsoid.