====== TM75 / Irish Grid ======

**EPSG : 29903**
  * Description : TM75 / Irish Grid 
  * Type : Projected CRS
  * Area : Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Since [[110:orbitgis:updates:update_10_2|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.
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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|}}.
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{{  epsg_29903.png?nolink  |}}
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More information about :
  * the use and application of Coordinate Reference Systems in Orbit, see [[crs_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]]