12. April 1998
Coordinate Reference Systems Ireland
Irish National Grid - "1975 Mapping Adjustment"
Ellipsoid: Airy Modified
Map Projection: Transverse Mercator
Central Point/Datum: Slieve Donard
Irish County Datums
Ellipsoid: Airy
Map Projection:
Central Point/Datum: County dependent
Name Reference Point: ref_pnt
Reference Level: ref_level
Geoid: geoid-name