Datum: Adindan

Geodetic Datum used in Africa - Eritrea, Ethiopia, South Sudan and Sudan

Adindan is a geodetic datum first defined in 1958-01-01 and is suitable for use in Eritrea; Ethiopia; South Sudan; Sudan.. Adindan references the Clarke 1880 (RGS) ellipsoid and the Greenwich prime meridian. Adindan origin is Fundamental point: Station 15; Adindan. Latitude: 22°10'07.110"N, longitude: 31°29'21.608"E (of Greenwich). Adindan is a geodetic datum for Topographic mapping. It was defined by information from US Coast and Geodetic Survey via Geophysical Reasearch vol 67 #11, October 1962. The 12th parallel traverse of 1966-70 (Point 58 datum, code 6620) is connected to the Blue Nile 1958 network in western Sudan. This has given rise to misconceptions that the Blue Nile network is used in west Africa.

Datum Details
Datum Name:	Adindan
Code:	6201
Area Of Use:	Africa - Eritrea, Ethiopia, South Sudan and Sudan Area Details Area Name: Africa - Eritrea, Ethiopia, South Sudan and Sudan Area Code: 1271 Description: Eritrea; Ethiopia; South Sudan; Sudan. Extents: 22.24 ° 21.82 ° 47.99 ° 3.4 ° Meta Data Information Source: OGP Data Source: OGP Revision Date: December 5, 2020 Change Id: [2002.810] [2012.001] [2014.024]
Scope:	Topographic mapping.
Type:	geodetic
Realization Epoch:	1958-01-01
Origin:	Fundamental point: Station 15; Adindan. Latitude: 22°10'07.110"N, longitude: 31°29'21.608"E (of Greenwich).
Ellipsoid:	Clarke 1880 (RGS) Ellipsoid Details Name: Clarke 1880 (RGS) Code: 7012 Shape: Ellipsoid Semi-Major Axis: 6378249.145 metre Unit Details Unit Name: metre Unit Code: 9001 Type: length Target Unit: metre Meta Data Remarks: Also known as International metre. SI standard unit. Information Source: ISO 1000. Data Source: IOGP Revision Date: December 5, 2020 Change Id: [2015.062] Inverse Flattening: 293.465 Meta Data Remarks: Adopts Clarke's values for a and 1/f. Adopts his 1865 ratio of 39.370432 inches per metre to convert semi-major axis to metres. Also known as Clarke Modified 1880. Information Source: Empire Survey Review #32; 1939. Data Source: OGP Revision Date: December 5, 2020
Prime Meridian:	Greenwich Prime Meridian Details Name: Greenwich Code: 8901 Greenwich Longitude: 0 degree Unit Details Unit Name: degree Unit Code: 9102 Type: angle Target Unit: radian Unit Details Unit Name: radian Unit Code: 9101 Type: angle Target Unit: radian Meta Data Remarks: SI standard unit. Information Source: ISO 1000:1992 Data Source: IOGP Revision Date: December 5, 2020 Change Id: [2015.062] Meta Data Remarks: = pi/180 radians Information Source: Data Source: IOGP Revision Date: December 5, 2020 Change Id: [1996.220] [2002.860] [2015.062] Meta Data Remarks: The international reference meridian as defined first by the 1884 International Meridian Conference and later by the Bureau International de l'Heure (BIH) and then the International Earth Rotation Service (IERS). Information Source: OGP Data Source: IOGP Revision Date: December 5, 2020 Change Id: [1996.290] [2016.045]
Applicable CRS-s:	The following CRS are based on this datum: [Adindan]
Meta Data
Remarks:	The 12th parallel traverse of 1966-70 (Point 58 datum, code 6620) is connected to the Blue Nile 1958 network in western Sudan. This has given rise to misconceptions that the Blue Nile network is used in west Africa.
Information Source:	US Coast and Geodetic Survey via Geophysical Reasearch vol 67 #11, October 1962.
Data Source:	IOGP
Revision Date:	December 5, 2020
Change Id:	[2002.431] [2003.361] [2008.045] [2015.010]
Alias:	Alias Naming System Remarks Blue Nile 1958 EPSG alias D_Adindan ESRI