Transformations and OSGM02 user guide - Leica Geosystems

4 the height of the Geoid above the ETRS89 ellipsoid, in metres, at the intersection, that isETRS89 height – OSGM02 Geoid height = orthometric height above mean sea level.5 the Geoid datum flag is a number from 1 to 14, representing the geoid datum to which OSGM02 Geoid heightrelates, for example, this flag is 13 for Malin Head, the orthometric height datum used in the Republic of Ireland.See table 1 below for details of other datum flag references.Table 1Geoid datum flag Datum name Region0 N/A Outside model boundary1 Newlyn UK mainland2 St Marys Scilly Isles3 Douglas02 Isle of Man4 Stornoway Outer Hebrides5 St Kilda St Kilda6 Lerwick Shetland Isles7 Newlyn Orkney Isles8 Fair Isle Fair Isle9 Flannan Isles Flannan Isles10 North Rona North Rona11 Sule Skerry Sule Skerry12 Foula Foula13 Malin Head Republic of Ireland14 Belfast Northern IrelandNOTE: If the datum flag indicates a zero (0) then the coordinate falls more than 10 km offshore or 2 km beyond theNorthern Ireland/Republic of Ireland border and is not covered by the model.Transformations and OSGM02 user guide chapter 2v2.1 9/2002 © crown copyrightPage 17