🌍 GEODETIC REFERENCE
Surveying in Ireland
Irish Transverse Mercator (ITM, EPSG:2157) is the modern standard, replacing the older Irish Grid (TM65/TM75).
National datum
IRENET95 / ETRS89
Vertical datum
Malin Head (OD)
UTM zones
29N, 30N
CORS network
Active GPS network — OSi
Mapping authority
Ordnance Survey Ireland (OSi) + OSNI