# $Id: Ellipsoids.txt 12822 2014-01-31 23:39:56Z remko $ # # This is the core listing of supported ellipsoids in GMT map projections. # Please adhere to the format. # # This file is converted to gmt_ellipsoids.h by the guru's make process # described in src/GNUmakefile. It also updates GMT_N_ELLIPSOIDS in # gmt_dimensions.h. Changing this file at runtime has no affect. # # a: Equatorial axis [m] # b: Polar axis [m] # 1/f: Flattening = (a-b)/a # # Tab-ID Year a [m] 1/f [m] Info #------------------------------------------------------------------------------- Airy 1830 6377563.396 299.3249646 : Applies to Great Britain Airy-Ireland 1830 6377340.189 299.3249646 : Applies to Ireland in 1965 Andrae 1876 6377104.43 300.0 : Applies to Denmark and Iceland APL4.9 1965 6378137.0 298.25 : Appl. Physics ATS77 1977 6378135.0 298.257 : Average Terrestrial System, Canada Maritime provinces Australian 1965 6378160.0 298.25 : Applies to Australia Bessel 1841 6377397.155 299.1528128 : Applies to Central Europe, Chile, Indonesia Bessel-Namibia 1841 6377483.865 299.1528128 : Same as Bessel-Schwazeck Bessel-NGO1948 1841 6377492.0176 299.15281 : Modified Bessel for NGO 1948 Bessel-Schwazeck 1841 6377483.865 299.1528128 : Applies to Namibia Clarke-1858 1858 6378293.639 294.26068 : Clarke's early ellipsoid Clarke-1866 1866 6378206.4 294.9786982 : Applies to North America, the Philippines Clarke-1866-Michigan 1866 6378450.047484481 294.9786982 : Modified Clarke-1866 for Michigan Clarke-1880 1880 6378249.145 293.465 : Applies to most of Africa, France Clarke-1880-Arc1950 1880 6378249.145326 293.4663076 : Modified Clarke-1880 for Arc 1950 Clarke-1880-IGN 1880 6378249.2 293.4660213 : Modified Clarke-1880 for IGN Clarke-1880-Jamaica 1880 6378249.136 293.46631 : Modified Clarke-1880 for Jamaica Clarke-1880-Merchich 1880 6378249.2 293.46598 : Modified Clarke-1880 for Merchich Clarke-1880-Palestine 1880 6378300.79 293.46623 : Modified Clarke-1880 for Palestine CPM 1799 6375738.7 334.29 : Comm. des Poids et Mesures, France Delambre 1810 6376428.0 311.5 : Applies to Belgium Engelis 1985 6378136.05 298.2566 : Goddard Earth Models Everest-1830 1830 6377276.345 300.8017 : India, Burma, Pakistan, Afghanistan, Thailand Everest-1830-Kalianpur 1830 6377301.243 300.80174 : Modified Everest for Kalianpur (1956) Everest-1830-Kertau 1830 6377304.063 300.8017 : Modified Everest for Kertau, Malaysia & Singapore Everest-1830-Pakistan 1830 6377309.613 300.8017 : Modified Everest for Pakistan Everest-1830-Timbalai 1830 6377298.556 300.8017 : Modified Everest for Timbalai, Sabah Sarawak Fischer-1960 1960 6378166.0 298.3 : Used by NASA for Mercury program Fischer-1960-SouthAsia 1960 6378155.0 298.3 : Same as Modified-Fischer-1960 Fischer-1968 1968 6378150.0 298.3 : Used by NASA for Mercury program FlatEarth 1984 6371008.7714 0 : As Sphere, but implies fast "Flat Earth" distance calculations GRS-67 1967 6378160.0 298.247167427 : International Geodetic Reference System GRS-80 1980 6378137.0 298.257222101 : International Geodetic Reference System Hayford-1909 1909 6378388.0 297.0 : Same as the International 1924 Helmert-1906 1906 6378200.0 298.3 : Applies to Egypt Hough 1960 6378270.0 297.0 : Applies to the Marshall Islands Hughes-1980 1980 6378273.0 298.2794 : Hughes Aircraft Company for DMSP SSM/I grid products IAG-75 1975 6378140.0 298.257222 : International Association of Geodesy Indonesian 1974 6378160.0 298.247 : Applies to Indonesia International-1924 1924 6378388.0 297.0 : Worldwide use International-1967 1967 6378157.5 298.25 : Worldwide use Kaula 1961 6378163.0 298.24 : From satellite tracking Krassovsky 1940 6378245.0 298.3 : Used in the (now former) Soviet Union Lerch 1979 6378139.0 298.257 : For geoid modelling Maupertius 1738 6397300.0 191.0 : Really old ellipsoid used in France Mercury-1960 1960 6378166.0 298.3 : Same as Fischer-1960 MERIT-83 1983 6378137.0 298.257 : United States Naval Observatory Modified-Airy 1830 6377340.189 299.3249646 : Same as Airy-Ireland Modified-Fischer-1960 1960 6378155.0 298.3 : Applies to Singapore Modified-Mercury-1968 1968 6378150.0 298.3 : Same as Fischer-1968 NWL-10D 1972 6378135.0 298.26 : Naval Weapons Lab (Same as WGS-72) NWL-9D 1966 6378145.0 298.25 : Naval Weapons Lab (Same as WGS-66) OSU86F 1986 6378136.2 298.25722 : Ohio State University OSU91A 1991 6378136.3 298.25722 : Ohio State University Plessis 1817 6376523.0 308.64 : Old ellipsoid used in France SGS-85 1985 6378136.0 298.257 : Soviet Geodetic System South-American 1969 6378160.0 298.25 : Applies to South America Sphere 1984 6371008.7714 0 : The mean radius in WGS-84 (for spherical/plate tectonics applications) Struve 1860 6378297.0 294.73 : Friedrich Georg Wilhelm Struve TOPEX 1990 6378136.3 298.257 : Used commonly for altimetry Walbeck 1819 6376896.0 302.78 : First least squares solution by Finnish astronomer War-Office 1926 6378300.583 296.0 : Developed by G. T. McCaw WGS-60 1960 6378165.0 298.3 : World Geodetic System WGS-66 1966 6378145.0 298.25 : World Geodetic System WGS-72 1972 6378135.0 298.26 : World Geodetic System WGS-84 1984 6378137.0 298.257223563 : World Geodetic System [Default] Moon 2000 1737400.0 0 : Moon (IAU2000) Mercury 2000 2439700.0 0 : Mercury (IAU2000) Venus 2000 6051800.0 0 : Venus (IAU2000) Mars 2000 3396190.0 169.894447224 : Mars (IAU2000) Jupiter 2000 71492000.0 15.4144027598 : Jupiter (IAU2000) Saturn 2000 60268000.0 10.2079945799 : Saturn (IAU2000) Uranus 2000 25559000.0 43.6160409556 : Uranus (IAU2000) Neptune 2000 24764000.0 58.5437352246 : Neptune (IAU2000) Pluto 2000 1195000.0 0 : Pluto (IAU2000) #------------------------------------------------------------------------------- # vim: noet ts=8 sts=8 sw=8