Specifications

Reference Datums and Ellipsoids A-3
Reference
OGB Airy 1830 375, -111, 431 OSG
Ordnance Survey of Great Britain
1936 (England,Isle of Man,Scot-
land,Shetland Islands, Wales)
OHA Clarke 1866 61, -285, -181 OLDHW
Old Hawaiian
PIT International 1924 185, 165, 42 Pitcairn Astro 1967 (Pitcairn
Island)
QAT International 1924 -128, -283, 22 Qatar National (Qatar)
QUO International 1924 164, 138, -189 Qornoq (South Greenland)
SAN South American
1969
-57, 1, -41 SAMER69
S. American 1969 (Argen-
tina,Bolivia,Brazil,Chile,Colom-
bia,Ecuador,Guyan,Paraguay,Peru,
Venezuela,Trinidad,Tobago)
SCK Bessel 1841
Namibia
616, 97, -251 Schwarzeck (Namibia)
TIL Everest -689, 691, -46 Timbalai 1948 (Brunei,East Malay-
sia, Sarawak,Sabah)
TOY Bessel 1841 -128, 481, 664 Tokyo (Japan,Korea,Okinawa)
UDD User Defined user defined User defined
W72 WGS72 0, 0, +4.5 WGS72
World Geodetic System - 72
W84 WGS84 0, 0, 0 WGS84
World Geodetic System - 84
ZAN International 1924 -265, 120, -358 Zanderij (Surinam)
Table A.2: Reference Ellipsoids
Ellipsoid a (metres) 1/f f
Airy 1830 6377563.396 299.3249647 0.00334085064038
Modified Airy 6377340.189 299.3249647 0.00334085064038
Australian National 6378160.0 298.25 0.00335289186924
Bessel 1841 6377397.155 299.1528128 0.00334277318217
Table A.1: Available Geodetic Datums (continued)
Datum ID
Reference
Ellipsoid
Offset in meters
(dX,dY,dZ
Datum Description