Ordnance Survey's Levelling of Great Britain

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DATUM_CODE	DATUM_NAME	DATUM_TYPE	ORIGIN_DESCRIPTION	REALIZATION_EPOCH	ELLIPSOID_CODE	PRIME_MERIDIAN_CODE	AREA_OF_USE_CODE	DATUM_SCOPE	REMARKS	INFORMATION_SOURCE	DATA_SOURCE	REVISION_DATE	CHANGE_ID	DEPRECATED	ESRI_DATUM_NAME
5101	Ordnance Datum Newlyn	vertical					2792	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	1996-10-18 00:00:00		0
5130	Malin Head	vertical	Mean sea level between January 1960 and December 1969.	1970			1305	Topographic mapping		Ordnance Survey of Ireland	EPSG	2001-11-06 00:00:00		0
5131	Belfast Lough	vertical	Mean sea level between 1951 and 1956 at Clarendon Dock, Belfast.	1957			2530	Large scale (1:1,250, 1:2,500 and 1:10,000) topographic mapping.	Malin Head (datum code 5130) used for 1:50,000 and smaller mapping.	Ordnance Survey of Northern Ireland	EPSG	2002-09-19 00:00:00	2002.62	0
5138	Ordnance Datum Newlyn (Orkney Isles)	vertical					2793	Topographic mapping, geodetic survey.	Connected to Newlyn datum by triangulation from the British mainland.	Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5139	Fair Isle	vertical					2794	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5140	Lerwick	vertical					2795	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5141	Foula	vertical					2796	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5142	Sule Skerry	vertical					2797	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5143	North Rona	vertical					2798	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5144	Stornoway	vertical					2799	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5145	St. Kilda	vertical					2800	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5146	Flannan Isles	vertical					1264	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5147	St. Marys	vertical					2802	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5148	Douglas	vertical					2803	Topographic mapping, geodetic survey.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00		0
5152	Poolbeg	vertical	Low water mark of the spring tide on the 8 April 1837 at Poolbeg Lighthouse, Dublin.	1837			1305	Topographic mapping before 1956 in Northern Ireland and 1970 in the Republic of Ireland.	Superseded by Belfast Lough and Malin Head (datum codes 5130-31).	'The Irish Grid - A Description of the Co-ordinate Reference System' published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.	EPSG	2003-06-27 00:00:00		0
6139	Puerto Rico	geodetic	Fundamental point: Cardona Island Lighthouse. Latitude:17 deg 57 min 31.40 sec N; Longitude: 66 deg 38 min 07.53 sec W (of Greenwich).	1901	7008	8901	1335	Topographic mapping.	NADCON conversion program provides transformation from Puerto Rico Datum to NAD83 (original 1986 realization) but making the transformation appear to user as if from NAD27.	Ordnance Survey of Great Britain and http://www.ngs.noaa.gov/ (NADCON readme file).	EPSG	2003-12-31 00:00:00	2003.362	0	D_Puerto_Rico
6158	Naparima 1955	geodetic	Fundamental point: Naparima. Latitude: 10 deg 16 min 44.860 sec N; Longitude: 61 deg 27 min 34.620 sec W (of Greenwich).	1955	7022	8901	1339	Topographic mapping.	Naparima 1972 is an extension of the Naparima 1955 network of Trinidad to include Tobago.	Ordnance Survey International.	EPSG	2000-03-07 00:00:00		0
6168	Accra	geodetic	Fundamental point: GCS Station 547. Latitude: 5 deg 23 min 43.3 sec N; Longitude: 0 deg 11 min 52.3 sec W (of Greenwich).		7029	8901	1104	Topographic mapping.	Superseded in 1978 by Leigon datum (code 6250).	Ordnance Survey International	EPSG	2000-10-12 00:00:00		0
6173	IRENET95	geodetic	ETRS89 stations in Ireland	1995	7019	8901	1305	Geodetic survey.	Densification of ETRS89	Ordnance Survey of Ireland	EPSG	2000-10-19 00:00:00		0
6174	Sierra Leone Colony 1924	geodetic	Fundamental point: Kortright. Latitude: 8 deg 28 min 44.4 sec N; Longitude: 13 deg 13 min 03.81 sec W (of Greenwich).	1924	7029	8901	1342	Topographic mapping, engineering survey.		Ordnance Survey International.	EPSG	2001-06-05 00:00:00		0
6175	Sierra Leone 1968	geodetic	Fundamental point: SLX2 Astro. Latitude: 8 deg 27 min 17.567 sec N; Longitude: 12 deg 49 min 40.186 sec W (of Greenwich).	1968	7012	8901	1209	Topographic mapping, engineering survey.	Extension and readjustment with additional observations of 1960 network. Coordinates of 1960 stations change by less than 3 metres.	Ordnance Survey International.	EPSG	2001-06-05 00:00:00		0
6188	OSNI 1952	geodetic	Position fixed to the coordinates from the 19th century Principle Triangulation of station Divis. Scale and orientation controlled by position of Principle Triangulation stations Knocklayd and Trostan.	1952	7001	8901	2530	Geodetic survey and topographic mapping.	Superseded by Geodetic Datum of 1965 alias 1975 Mapping Adjustment or TM75 (datum code 6300).	Ordnance Survey of Northern Ireland.	EPSG	2001-11-06 00:00:00		0
6212	Barbados 1938	geodetic	Fundamental point: HMS Challenger astro station M1; latitude 13 deg 04 min 32.53 sec N; longitude 59 deg 36 min 29.34 sec W (of Greenwich).	1938	7012	8901	1042	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00	99.171	0	D_Barbados_1938
6250	Leigon	geodetic	Fundamental point: GCS Station 121, Leigon. Latitude: 5 deg 38 min 52.27 sec N; Longitude: 0 deg 11 min 46.08 sec W (of Greenwich).		7012	8901	1104	Topographic mapping.	Superseded Accra datum (code 6168) from 1978. Coordinates at Leigon fundamental point defined as Accra datum values for that point.	Ordnance Survey International	EPSG	1995-06-02 00:00:00		0	D_Leigon
6271	Naparima 1972	geodetic	Fundamental point: Naparima. Latitude: 10 deg 16 min 44.860 sec N; Longitude: 61 deg 27 min 34.620 sec W (of Greenwich).	1972	7022	8901	1322	Topographic mapping.	Naparima 1972 is an extension of the Naparima 1955 network of Trinidad to include Tobago.	Ordnance Survey International.	EPSG	1995-06-02 00:00:00		0	D_Naparima_1972
6277	OSGB 1936	geodetic	Fundamental point: Pre 2002: Herstmonceux, Latitude: 50 deg 51 min 55.271 sec N; Longitude: 0 deg 20 min 45.882 sec E (of Greenwich). From April 2002 the datum is defined through the application of the OSTN02 transformation (tfm code 1039) to ETRS89.	1936	7001	8901	1264	Topographic mapping.Topographic mapping.Topographic mapping.Topographic mapping.		Ordnance Survey of Great Britain	EPSG	2002-09-19 00:00:00	2002.62	0	D_OSGB_1936
6299	TM65	geodetic	Adjusted to best mean fit 12 stations of the OSNI 1952 primary adjustment.	1965	7002	8901	1305	Topographic mapping.	Differences between OSNI 1952 and TM65 at these stations are RMS 0.25m east, 0.23m north, maximum vector 0.57m. TM65 superseded by and not to be confused with Geodetic Datum of 1965 alias 1975 Mapping Adjustment or TM75 (datum code 6300).	'The Irish Grid - A Description of the Co-ordinate Reference System' published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.	EPSG	2003-06-27 00:00:00	2002.621	0	D_TM65
6300	Geodetic Datum of 1965	geodetic	Adjusted to best mean fit 9 stations of the OSNI 1952 primary adjustment in Northern Ireland plus the 1965 values of 3 stations in the Republic of Ireland.	1975	7002	8901	1305	Geodetic survey, topographic mapping and engineering survey.	Differences from the 1965 adjustment (datum code 6299) are: average difference in Eastings 0.092m; average difference in Northings 0.108m; maximum vector difference 0.548m.	'The Irish Grid - A Description of the Co-ordinate Reference System' published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.	EPSG	2003-06-27 00:00:00	2002.621	0	D_TM75
6600	Anguilla 1957	geodetic	Fundamental point: station A4.	1957	7012	8901	1030	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_Anguilla_1957
6601	Antigua 1943	geodetic	Fundamental point: station A14.	1943	7012	8901	1273	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_Antigua_1943
6602	Dominica 1945	geodetic	Fundamental point: station M12.	1945	7012	8901	1082	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_Dominica_1945
6603	Grenada 1953	geodetic	Fundamental point: station GS8.	1953	7012	8901	1551	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_Grenada_1953
6604	Montserrat 1958	geodetic	Fundamental point: station M36.	1958	7012	8901	1165	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0
6605	St. Kitts 1955	geodetic	Fundamental point: station K12.	1955	7012	8901	1200	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_St_Kitts_1955
6606	St. Lucia 1955	geodetic	Fundamental point: station DCS3.	1955	7012	8901	1201	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_St_Lucia_1955
6607	St. Vincent 1945	geodetic	Fundamental point: station V1.	1945	7012	8901	1202	Topographic mapping.		Ordnance Survey of Great Britain.	EPSG	1999-04-22 00:00:00		0	D_St_Vincent_1945

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