4001,Unknown datum based upon the Airy 1830 ellipsoid,Not Used,Not specified.,Not specified (based on Airy 1830 ellipsoid),Airy 1830,299.3249646,Greenwich,6377563.396,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4002,Unknown datum based upon the Airy Modified 1849 ellipsoid,Not Used,Not specified.,Not specified (based on Airy Modified 1849 ellipsoid),Airy Modified 1849,299.3249646,Greenwich,6377340.189,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4003,Unknown datum based upon the Australian National Spheroid,Not Used,Not specified.,Not specified (based on Australian National Spheroid),Australian National Spheroid,298.25,Greenwich,6378160,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4004,Unknown datum based upon the Bessel 1841 ellipsoid,Not Used,Not specified.,Not specified (based on Bessel 1841 ellipsoid),Bessel 1841,299.1528128,Greenwich,6377397.155,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4005,Unknown datum based upon the Bessel Modified ellipsoid,Not Used,Not specified.,Not specified (based on Bessel Modified ellipsoid),Bessel Modified,299.1528128,Greenwich,6377492.018,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4006,Unknown datum based upon the Bessel Namibia ellipsoid,Not Used,Not specified.,Not specified (based on Bessel Namibia ellipsoid),Bessel Namibia (GLM),299.1528128,Greenwich,6377397.155,German legal metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4007,Unknown datum based upon the Clarke 1858 ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1858 ellipsoid),Clarke 1858,294.26068,Greenwich,20926348,Clarke's foot,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4008,Unknown datum based upon the Clarke 1866 ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1866 ellipsoid),Clarke 1866,294.9787,Greenwich,6378206.4,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4009,Unknown datum based upon the Clarke 1866 Michigan ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1866 Michigan ellipsoid),Clarke 1866 Michigan,294.9787,Greenwich,20926631.53,US survey foot,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4010,Unknown datum based upon the Clarke 1880 (Benoit) ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 (Benoit) ellipsoid),Clarke 1880 (Benoit),293.46632,Greenwich,6378300.789,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4011,Unknown datum based upon the Clarke 1880 (IGN) ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 (IGN) ellipsoid),Clarke 1880 (IGN),293.46602,Greenwich,6378249.2,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4012,Unknown datum based upon the Clarke 1880 (RGS) ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 (RGS) ellipsoid),Clarke 1880 (RGS),293.465,Greenwich,6378249.145,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4013,Unknown datum based upon the Clarke 1880 (Arc) ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 (Arc) ellipsoid),Clarke 1880 (Arc),293.4663077,Greenwich,6378249.145,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4014,Unknown datum based upon the Clarke 1880 (SGA 1922) ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 (SGA 1922) ellipsoid),Clarke 1880 (SGA 1922),293.46598,Greenwich,6378249.2,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4015,Unknown datum based upon the Everest 1830 (1937 Adjustment) ellipsoid,Not Used,Not specified.,Not specified (based on Everest 1830 (1937 Adjustment) ellipsoid),Everest 1830 (1937 Adjustment),300.8017,Greenwich,6377276.345,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4016,Unknown datum based upon the Everest 1830 (1967 Definition) ellipsoid,Not Used,Not specified.,Not specified (based on Everest 1830 (1967 Definition) ellipsoid),Everest 1830 (1967 Definition),300.8017,Greenwich,6377298.556,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4018,Unknown datum based upon the Everest 1830 Modified ellipsoid,Not Used,Not specified.,Not specified (based on Everest 1830 Modified ellipsoid),Everest 1830 Modified,300.8017,Greenwich,6377304.063,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4019,Unknown datum based upon the GRS 1980 ellipsoid,Not Used,Not specified.,Not specified (based on GRS 1980 ellipsoid),GRS 1980,298.2572221,Greenwich,6378137,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4020,Unknown datum based upon the Helmert 1906 ellipsoid,Not Used,Not specified.,Not specified (based on Helmert 1906 ellipsoid),Helmert 1906,298.3,Greenwich,6378200,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4021,Unknown datum based upon the Indonesian National Spheroid,Not Used,Not specified.,Not specified (based on Indonesian National Spheroid),Indonesian National Spheroid,298.247,Greenwich,6378160,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4022,Unknown datum based upon the International 1924 ellipsoid,Not Used,Not specified.,Not specified (based on International 1924 ellipsoid),International 1924,297,Greenwich,6378388,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4024,Unknown datum based upon the Krassowsky 1940 ellipsoid,Not Used,Not specified.,Not specified (based on Krassowsky 1940 ellipsoid),Krassowsky 1940,298.3,Greenwich,6378245,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4025,Unknown datum based upon the NWL 9D ellipsoid,Not Used,Not specified.,Not specified (based on NWL 9D ellipsoid),NWL 9D,298.25,Greenwich,6378145,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4027,Unknown datum based upon the Plessis 1817 ellipsoid,Not Used,Not specified.,Not specified (based on Plessis 1817 ellipsoid),Plessis 1817,308.64,Greenwich,6376523,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4028,Unknown datum based upon the Struve 1860 ellipsoid,Not Used,Not specified.,Not specified (based on Struve 1860 ellipsoid),Struve 1860,294.73,Greenwich,6378298.3,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4029,Unknown datum based upon the War Office ellipsoid,Not Used,Not specified.,Not specified (based on War Office ellipsoid),War Office,296,Greenwich,6378300,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4030,Unknown datum based upon the WGS 84 ellipsoid,Not Used,Not specified.,Not specified (based on WGS 84 ellipsoid),WGS 84,298.2572236,Greenwich,6378137,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4031,Unknown datum based upon the GEM 10C ellipsoid,Not Used,Not specified.,Not specified (based on GEM 10C ellipsoid),GEM 10C,298.2572236,Greenwich,6378137,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4032,Unknown datum based upon the OSU86F ellipsoid,Not Used,Not specified.,Not specified (based on OSU86F ellipsoid),OSU86F,298.2572236,Greenwich,6378136.2,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4033,Unknown datum based upon the OSU91A ellipsoid,Not Used,Not specified.,Not specified (based on OSU91A ellipsoid),OSU91A,298.2572236,Greenwich,6378136.3,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4034,Unknown datum based upon the Clarke 1880 ellipsoid,Not Used,Not specified.,Not specified (based on Clarke 1880 ellipsoid),Clarke 1880,293.465,Greenwich,20926202,Clarke's foot,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4036,Unknown datum based upon the GRS 1967 ellipsoid,Not Used,Not specified.,Not specified (based on GRS 1967 ellipsoid),GRS 1967,298.2471674,Greenwich,6378160,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4041,Unknown datum based upon the Average Terrestrial System 1977 ellipsoid,Not Used,Not specified.,Not specified (based on Average Terrestrial System 1977 ellipsoid),Average Terrestrial System 1977,298.257,Greenwich,6378135,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4042,Unknown datum based upon the Everest (1830 Definition) ellipsoid,Not Used,Not specified.,Not specified (based on Everest (1830 Definition) ellipsoid),Everest (1830 Definition),300.8017,Greenwich,20922931.8,Indian foot,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4043,Unknown datum based upon the WGS 72 ellipsoid,Not Used,Not specified.,Not specified (based on WGS 72 ellipsoid),WGS 72,298.26,Greenwich,6378135,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4044,Unknown datum based upon the Everest 1830 (1962 Definition) ellipsoid,Not Used,Not specified.,Not specified (based on Everest 1830 (1962 Definition) ellipsoid),Everest 1830 (1962 Definition),300.8017255,Greenwich,6377301.243,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4045,Unknown datum based upon the Everest 1830 (1975 Definition) ellipsoid,Not Used,Not specified.,Not specified (based on Everest 1830 (1975 Definition) ellipsoid),Everest 1830 (1975 Definition),300.8017255,Greenwich,6377299.151,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
4047,Unspecified datum based upon the GRS 1980 Authalic Sphere,Not Used,Not specified.,Not specified (based on GRS 1980 Authalic Sphere),GRS 1980 Authalic Sphere,,Greenwich,6370997,metre,"Lat, north positive, degree",Lat,north,degree,"Long, east positive, degree",Long,east,degree
