Ordnance Survey Geoid Model of 2002

In Great Britain, the Ordnance Survey Geoid Model of 2002 relates the difference between the GRS80 ellipsoid and Ordnance Datum Newlyn and associated British vertical datums.

In Northern Ireland, the Ordnance Survey Geoid Model of 2002 relates the difference between the GRS80 ellipsoid and the Belfast Lough datum.

In the Republic of Ireland, the Ordnance Survey Geoid Model of 2002 relates the difference between the GRS80 ellipsoid and the Malin Head datum.

The "OSGM02" vertical transform has the following parameters:

 The path parameter can either be fully qualified or relative to the location of the data source file in which it is defined. The path string should not end with a slash character.

For more information, please consult the Ordinance Survey Website.