====== OSGB 1936 / British National Grid and Local ortho height ======

{{  technologies:crs:epsg_27700.png?nolink|}}

Orbit supports the OSGB 1936 / British National Grid as described by the Ordnance Survey. Both OSTN02 XY and OSGM02 Z grid corrections are implemented. 

=== Related Coordinate Systems ===

** Projected CRS **
  * 27700 : OSGB 1936 / British National Grid

** Vertical CRS  **
  * 5701 : ODN height
  * 5740 : ODN Orkney height
  * 5741 : Fair Isle height
  * 5742 : Lerwick height
  * 5743 : Foula height
  * 5744 : Sule Skerry height
  * 5745 : North Rona height
  * 5746 : Stornoway height
  * 5747 : St Kilda height
  * 5748 : Flannan Isles height
  * 5749 : St Marys height
  * 5750 : Douglas height

=== Add CRS Defintion ===

To use this implementation as defined by the Ordnance Survey :

  * Download : {{technologies:crs:ostn02_osgm02_gb.zip|}} (22MB)
  * Unzip and Copy to : <Orbit installation directory>/program/system/crs

=== More Information ===

  * [[112:technologies:crs:crs_orbit|]]
  * http://www.ordnancesurvey.co.uk (technical specifications about coordinate system)