TM75 / Irish Grid

EPSG : 29903

• Description : TM75 / Irish Grid
• Type : Projected CRS
• Area : Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Since version 10.2 Orbit supports the TM75 / Irish Grid as described by the Ordnance Survey.
Both OS Polynomial transformation xy and OSGM02 z grid corrections are implemented.

To use this implementation the Ordnance Survey grid file OSGM02_RoI.bin (1.5MB) need to be available in the Orbit directory (program/system/crs).
Download, unzip and copy to the indicated directory : osgm02_roi.zip.



More information about :

• the use and application of Coordinate Reference Systems in Orbit, see Coordinate Reference Systems in Orbit
• technical specifications of this coordinate system , read the available documentation on the Ordnance Survey website :
  • http://www.ordnancesurvey.co.uk/oswebsite/gps/information/index.html
  • http://www.ordnancesurvey.co.uk/oswebsite/gps/osnetfreeservices/furtherinfo/questdeveloper.html