====== OSNI 1952 / Irish National Grid ======

**EPSG : 29901**
  * Description : OSNI 1952 / Irish National Grid
  * Type : Projected CRS
  * Area : United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Since [[112:orbit_desktop:updates:update_10_2|version 10.2]] Orbit supports the OSNI 1952 / Irish National 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_NI.bin (0.5MB) need to be available in the Orbit directory (program/system/crs). \\
Download, unzip and copy to the indicated directory : {{technologies:crs:osgm02_ni.zip|}}.
\\ \\
{{  technologies:crs:epsg_29901.png?nolink  |}}
\\ \\
More information about :
  * the use and application of Coordinate Reference Systems in Orbit, see [[112:technologies:crs: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]]