CGCS2000‘%vøºPjr°˜ºQÿz!v9(Q@¦TXA)#¨ùë”¤r@Defining parameters semi-major axis, flattening and angular velocity are same as for GRS 1980 (ellipsoid code 7019); GM = 3986004.4e8 m*m*m/s/s (from NASA 1986 Lageos determination).E¨ óÀña»wàºÈñØq»wàº<óû“ºwChinese Academy of Surveying and Mapping.ening and angular velocity are same as for GRS 1980 (ellipsoid code 7019); GM = 3986004.4e8 m*m*m/s/s (from NASA 1986 Lageos determination).E¨ óÀña»wàºÈñØq»wàº<óû“ºwOGPese Academy of Surveying and Mapping.11/12/20092009.0849demy of Surveying and Mapping.ening and angular velocity are same as for GRS 1980 (ellipsoid code 7019); GM = 3986004.4e8 m*m*m/s/s (from NASA 1986 Lageos determination).E¨ óÀña»wàºÈñØq»wàº<óû“ºwYAiry 1830demy of Surveying and Mapping.ening and angular velocity are same as bXÙTXA)#¹•3µr@Original definition is a=20923713, b=20853810 feet of 1796. 1/f is given to 7 decimal places. For the 1936 retriangulation OSGB defines the relationship of 10 feet of 1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...Ordnance Survey of Great Britain. b=20853810 feet of 1796. 1/f is given to 7 decimal places. For the 1936 retriangulation OSGB defines the relationship of 10 feet of 1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...OGPance Survey of Great Britain. b=208511/27/20061998.321 1998.340 2006.932itain. b=20853810 feet of 1796. 1/f is given to 7 decimal places. For the 1936 retriangulation OSGB defines the relationship of 10 feet of 1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...ZAiry Modified 1849006.932itain. b=20853810 feet of 1796. 1/f is given to 7 decu“ßSXA)#¹•3µr@OSGB Airy 1830 figure (ellipsoid code 7001) rescaled by 0.999965 to best fit the scale of the 19th century primary triangulation of Ireland.elationship of 10 feet of 1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491..."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.1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...OGP Irish Grid - A Description of the Co6/27/2003 1998.321 2002.622A Description of the Co-ordinate Reference System" published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...[Australian National Spheroidon of the Co-ordinate Reference System" published by¬TXA)#¤r@Based on the GRS 1967 figure but with 1/f taken to 2 decimal places exactly. The dimensions are also used as the GRS 1967 Modified ellipsoid (see code 7050).elfast.1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491..."Australian Map Grid Technical Manual"; National Mapping Council of Australia Special Publication #7; 1972as the GRS 1967 Modified ellipsoid (see code 7050).elfast.1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...OGPtralian Map Grid Technical Manual"; N8/11/2008n2002.500 2008.017id Technical Manual"; National Mapping Council of Australia Special Publication #7; 1972as the GRS 1967 Modified ellipsoid (see code 7050).elfast.1796 to the International metre through ([10^0.48401603]/10) exactly = 0.3048007491...\Bessel 18418.017id Technical Manual"; National Mapping Council of Australia Spe…ëIíSXA)#¦Õëq²r@Original Bessel definition is a=3272077.14 and b=3261139.33 toise. This used a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...US Army Map Service Technical Manual; 1943.nd b=3261139.33 toise. This used a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...OGPrmy Map Service Technical Manual; 1944/22/1999p1998.321 1998.340e Technical Manual; 1943.nd b=3261139.33 toise. This used a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...]Bessel Modified0e Technical Manual; 1943.nd b=3261139.33 toise. This used a weyé&TXA)#¦Õëq²r@Used in Norway and also in Sweden with a 1mm increase in semi-major axis.ed a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...sed in Norway and also in Sweden with a 1mm increase in semi-major axis.ed a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...OGP in Norway and also in Sweden with a 4/22/1999r1998.321rway and also in Sweden with a 1mm increase in semi-major axis.ed a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...^Bessel Namibiaand also in Sweden with a 1mm increase in semi-major axis.ed a weö(\÷TXA)#¦Õëq²r@a = 6377397.155 German legal metres. This is the same value as the Bessel 1841 figure (code 7004) but in different units. Used in Namibia.unt for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...Chief Directorate: Surveys and Mapping, Mowbray, South Africa.the Bessel 1841 figure (code 7004) but in different units. Used in Namibia.unt for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1...OGPf Directorate: Surveys and Mapping, M4/22/1999c1997.160ctorate: Surveys and Mapping, Mowbray, South Africa.the Bessel 1841 figure (code 7004) but in different units. Used in Namibia.unt for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.1..._Clarke 1858orate: Surveys and Mapping, Mowbray, South Africa.the Bessel 1841 fiÀøôsA-#œãsAClarke's 1858/II solution. Derived parameters: a = 6378293.645m using his 1865 ratio of 0.3047972654 feet per metre; 1/f = 294.26068… In Australia and Amoco Trinidad 1/f taken to two decimal places (294.26 exactly); elsewhere a and b used to derive 1/f."Ellipsoidisch Parameter der Erdfigur (1800-1950)" by Georg Strasser.his 1865 ratio of 0.3047972654 feet per metre; 1/f = 294.26068… In Australia and Amoco Trinidad 1/f taken to two decimal places (294.26 exactly); elsewhere a and b used to derive 1/f.OGPipsoidisch Parameter der Erdfigur (188/14/2005i1999.700 2005.370ameter der Erdfigur (1800-1950)" by Georg Strasser.his 1865 ratio of 0.3047972654 feet per metre; 1/f = 294.26068… In Australia and Amoco Trinidad 1/f taken to two decimal places (294.26 exactly); elsewhere a and b used to derive 1/f.`Clarke 18665.370ameter der Erdfigur (1800-1950)" by Georg Strasser.his 1865 raš™™™·TXA)#333ó™?XAOriginal definition a=20926062 and b=20855121 (British) feet. Uses Clarke's 1865 inch-metre ratio of 39.370432 to obtain metres. (Metric value then converted to US survey feet for use in the United States using 39.37 exactly giving a=20925832.16 ft US).US Army Map Service Technical Manual No. 7; 1943.tish) feet. Uses Clarke's 1865 inch-metre ratio of 39.370432 to obtain metres. (Metric value then converted to US survey feet for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGPrmy Map Service Technical Manual No. 6/2/1995ap1998.340ap Service Technical Manual No. 7; 1943.tish) feet. Uses Clarke's 1865 inch-metre ratio of 39.370432 to obtain metres. (Metric value then converted to US survey feet for use in the United States using 39.37 exactly giving a=20925832.16 ft US).aClarke 1866 Michiganechnical Manual No. 7; 1943.tish) feet. Uses Clarke's 1865 Ûù~x
õsA+#9´ÈŠ¸ãsAUsed for Michigan NAD27 State Plane zones. Radius = ellipsoid radius + 800 feet; this approximates the average elevation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).USGS Professional Paper #1395.lane zones. Radius = ellipsoid radius + 800 feet; this approximates the average elevation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGP Professional Paper #1395.lane zones6/2/1995es1998.220essional Paper #1395.lane zones. Radius = ellipsoid radius + 800 feet; this approximates the average elevation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).bClarke 1880 (Benoit)er #1395.lane zones. Radius = ellipsoid radius + 800 feet;Ûù~2ÏTXA)#=
×›•?XAAdopts Clarke's values for a and b. Uses Benoit's 1895 ratio of 0.9143992 metres per yard to convert to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).dopts Clarke's values for a and b. Uses Benoit's 1895 ratio of 0.9143992 metres per yard to convert to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGPts Clarke's values for a and b. Uses6/2/1995ar/2/1995arke's values for a and b. Uses Benoit's 1895 ratio of 0.9143992 metres per yard to convert to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).cClarke 1880 (IGN)lues for a and b. Uses Benoit's 1895 ratio of 0.9143992 metresÍÌÌLÂTXA)#Àˆ?XAAdopts Clarke's values for a and b using his 1865 ratio of 39.370432 inches per metre to convert axes to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).dopts Clarke's values for a and b using his 1865 ratio of 39.370432 inches per metre to convert axes to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGPts Clarke's values for a and b using 4/16/1998r1998.120rke's values for a and b using his 1865 ratio of 39.370432 inches per metre to convert axes to metres.levation of the state. Derived parameter: 1/f = 294.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).dClarke 1880 (RGS)lues for a and b using his 1865 ratio of 39.370432 inches per m®GIÂTXA)#=
×£pWr@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 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).Empire Survey Review #32; 1939. 1/f. Adopts his 1865 ratio of 39.370432 inches per metre to convert semi-major axis to metres. Also known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGPre Survey Review #32; 1939. 1/f. Ad6/2/1995rv/2/1995rvey Review #32; 1939. 1/f. Adopts his 1865 ratio of 39.370432 inches per metre to convert semi-major axis to metres. Also known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).eClarke 1880 (Arc)ew #32; 1939. 1/f. Adopts his 1865 ratio of 39.370432 inches ®GIÂTXA)#øÿuWr@Adopts Clarke's value for a with derived 1/f. Uses his 1865 ratio of 39.370432 inch per metre to convert semi-major axis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).Chief Directorate: Surveys and Mapping, Mowbray, South Africa.tio of 39.370432 inch per metre to convert semi-major axis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGPf Directorate: Surveys and Mapping, M6/5/2001ec2001.052ectorate: Surveys and Mapping, Mowbray, South Africa.tio of 39.370432 inch per metre to convert semi-major axis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).fClarke 1880 (SGA 1922)eys and Mapping, Mowbray, South Africa.tio of 39.370432 iÍÌÌLÂTXA)#qÉq§tWr@Used in Old French Triangulation (ATF). Uses Clarke's 1865 inch-metre ratio of 39.370432 to convert axes to metres.xis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).sed in Old French Triangulation (ATF). Uses Clarke's 1865 inch-metre ratio of 39.370432 to convert axes to metres.xis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).OGP in Old French Triangulation (ATF). 6/2/1995ld/2/1995ld French Triangulation (ATF). Uses Clarke's 1865 inch-metre ratio of 39.370432 to convert axes to metres.xis to metres. known as Clarke Modified 1880.4.97870et for use in the United States using 39.37 exactly giving a=20925832.16 ft US).gEverest 1830 (1937 Adjustment)n (ATF). Uses Clarke's 1865 inch-metre ratio of ázÏSXA)#@aÃÓÌr@Used for the 1937 readjustment of Indian triangulation. Clarke's 1865 Indian-British foot ratio (0.99999566) and Benoit's 1898 British inch-metre ratio (39.370113) rounded as 0.30479841 exactly and applied to Everest's 1830 definition taken as a and 1/fSurvey of India professional paper #28; 1939ngulation. Clarke's 1865 Indian-British foot ratio (0.99999566) and Benoit's 1898 British inch-metre ratio (39.370113) rounded as 0.30479841 exactly and applied to Everest's 1830 definition taken as a and 1/fOGPey of India professional paper #28; 110/18/19961996.2006ndia professional paper #28; 1939ngulation. Clarke's 1865 Indian-British foot ratio (0.99999566) and Benoit's 1898 British inch-metre ratio (39.370113) rounded as 0.30479841 exactly and applied to Everest's 1830 definition taken as a and 1/fhEverest 1830 (1967 Definition)per #28; 1939ngulation. Clarke's 1865 Indian-Bri•£ÔSXA)#@aÃÓÌr@Adopted 1967 for use in East Malaysia. Applies Sears 1922 inch-metre ratio of 39.370147 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet.d applied to Everest's 1830 definition taken as a and 1/fdopted 1967 for use in East Malaysia. Applies Sears 1922 inch-metre ratio of 39.370147 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet.d applied to Everest's 1830 definition taken as a and 1/fOGPted 1967 for use in East Malaysia. A6/2/199596/2/1995967 for use in East Malaysia. Applies Sears 1922 inch-metre ratio of 39.370147 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet.d applied to Everest's 1830 definition taken as a and 1/fjEverest 1830 Modifiedn East Malaysia. Applies Sears 1922 inch-metre ratio of 39'1ÖSXA)#@aÃÓÌr@Adopted 1967 for use in West Malaysia. Applies Benoit 1898 inch-metre ratio of 39.370113 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. applied to Everest's 1830 definition taken as a and 1/fdopted 1967 for use in West Malaysia. Applies Benoit 1898 inch-metre ratio of 39.370113 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. applied to Everest's 1830 definition taken as a and 1/fOGPted 1967 for use in West Malaysia. A6/2/199596/2/1995967 for use in West Malaysia. Applies Benoit 1898 inch-metre ratio of 39.370113 to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. applied to Everest's 1830 definition taken as a and 1/fkGRS 1980967 for use in West Malaysia. Applies Benoit 1898 inch-metre ratio of 3@¦TXA)#¨ùë”¤r@Adopted by IUGG 1979 Canberra. Inverse flattening is derived from geocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/f"Geodetic Reference System 1980" by H. Moritz; Bulletin Geodesiquegeocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGPdetic Reference System 1980" by H. Mo11/11/19981998.110 1998.320e System 1980" by H. Moritz; Bulletin Geodesiquegeocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/flHelmert 1906.320e System 1980" by H. Moritz; Bulletin Geodesiquegeocentric gra¶TXA)#ÍÌÌÌÌ¤r@Helmert 1906/III solution.1980" by H. Moritz; Bulletin Geodesiquegeocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/f"Ellipsoidisch Parameter der Erdfigur (1800-1950)" by Georg Strasserocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGPipsoidisch Parameter der Erdfigur (186/2/1995di/2/1995disch Parameter der Erdfigur (1800-1950)" by Georg Strasserocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fmIndonesian National SpheroidErdfigur (1800-1950)" by Georg Strasserocentric gra¬TXA)#Ë¡E¶ó£r@Based on the GRS 1967 figure but with 1/f taken to 3 decimal places exactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fRais paper. GRS 1967 figure but with 1/f taken to 3 decimal places exactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGP paper. GRS 1967 figure but with 1/f6/2/1995r./2/1995r. GRS 1967 figure but with 1/f taken to 3 decimal places exactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fnInternational 192467 figure but with 1/f taken to 3 decimal places exactly. graåTXA)#r@Adopted by IUGG 1924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fdopted by IUGG 1924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGPted by IUGG 1924 in Madrid. Based on 6/2/1995y /2/1995y IUGG 1924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fpKrassowsky 19401924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gra@ÁTXA)#ÍÌÌÌÌ¤r@rassowsky 19401924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/frassowsky 19401924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGPsowsky 19401924 in Madrid. Based on 6/2/1995y /2/1995y 19401924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fqNWL 9D5y 19401924 in Madrid. Based on Hayford 1909/1910 figures. xactly. gra@¨TXA)#¤r@Used by Transit Precise Ephemeris between October 1971 and January 1987.ly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fsed by Transit Precise Ephemeris between October 1971 and January 1987.ly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGP by Transit Precise Ephemeris between6/2/1995ra/2/1995ransit Precise Ephemeris between October 1971 and January 1987.ly. gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fsPlessis 1817it Precise Ephemeris between October 1971 and January 1987.ly. graÀSXA)#
×£p=Js@Rescaling of Delambre 1810 figure (a=6376985 m) to make meridional arc from equator to pole equal to 10000000 metres exactly. (Ref: Strasser).tor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fIGN Paris "Constants d'Ellipsoides" February 1972.make meridional arc from equator to pole equal to 10000000 metres exactly. (Ref: Strasser).tor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/fOGPParis "Constants d'Ellipsoides" Febru6/2/1995 "/2/1995 "Constants d'Ellipsoides" February 1972.make meridional arc from equator to pole equal to 10000000 metres exactly. (Ref: Strasser).tor J2 = 108263e8 and Earth's angular velocity = 7292115e-11 rad/s.verest's 1830 definition taken as a and 1/ftStruve 1860onstants d'Ellipsoides" February 1972.make meridional arc from equat333“ÎTXA)#Ház®kr@Original definition of semi-major axis given as 3272539 toise. In "Ellipsoidisch Parameter der Erdfigur (1800-1950)" , Strasser suggests a conversion factor of 1.94903631 which gives a=6378297.337 metres.d/s.verest's 1830 definition taken as a and 1/f"Geodesia y Cartografia Matematica" by Fernando Martin Asin; ISBN 84-398-0248-X. Parameter der Erdfigur (1800-1950)" , Strasser suggests a conversion factor of 1.94903631 which gives a=6378297.337 metres.d/s.verest's 1830 definition taken as a and 1/fOGPdesia y Cartografia Matematica" by Fe11/11/19981998.070 1998.340rafia Matematica" by Fernando Martin Asin; ISBN 84-398-0248-X. Parameter der Erdfigur (1800-1950)" , Strasser suggests a conversion factor of 1.94903631 which gives a=6378297.337 metres.d/s.verest's 1830 definition taken as a and 1/fuWar Office98.340rafia Matematica" by Fernando Martin Asin; ISBN 84-398-0248-X.ÏTXA)#€r@In non-metric form, a=20926201 Gold Coast feet. DMA Technical Manual 8358.1 and data derived from this quotes value for semi-major axis as 6378300.58m: OGP recommends use of defined value 6378300m exactly.d/s.verest's 1830 definition taken as a and 1/fTables for the use of the Gold Coast Survey Department, 1935.Manual 8358.1 and data derived from this quotes value for semi-major axis as 6378300.58m: OGP recommends use of defined value 6378300m exactly.d/s.verest's 1830 definition taken as a and 1/fOGPes for the use of the Gold Coast Surv10/29/20092009.0759the use of the Gold Coast Survey Department, 1935.Manual 8358.1 and data derived from this quotes value for semi-major axis as 6378300.58m: OGP recommends use of defined value 6378300m exactly.d/s.verest's 1830 definition taken as a and 1/fvWGS 8459the use of the Gold Coast Survey Department, 1935.Manual 8358.1 and d@¦TXA)#ˆmt–¤r@Inverse flattening derived from four defining parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fDMA Technical Manual 8350.2-B four defining parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGPTechnical Manual 8350.2-B four defi11/11/19981998.3208al Manual 8350.2-B four defining parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fwGEM 10C8al Manual 8350.2-B four defining parameters (semi-major axis; C20 = @¦TXA)#ˆmt–¤r@Used for GEM 10C Gravity Potential Model.ng parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fsed for GEM 10C Gravity Potential Model.ng parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGP for GEM 10C Gravity Potential Model6/2/1995 G1998.320 GEM 10C Gravity Potential Model.ng parameters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fxOSU86F0 GEM 10C Gravity Potential Model.ng parameters (semi-major axis; C20 = ÍÌÌ¦TXA)#ˆmt–¤r@Used for OSU86 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fsed for OSU86 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGP for OSU86 gravity potential (geoidal6/2/1995OS1998.320OSU86 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fyOSU91A0OSU86 gravity potential (geoidal) model.meters (semi-major axis; C20 = 333¦TXA)#ˆmt–¤r@Used for OSU91 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fsed for OSU91 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGP for OSU91 gravity potential (geoidal6/2/1995OS1998.320OSU91 gravity potential (geoidal) model.meters (semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fzClarke 188091 gravity potential (geoidal) model.meters (semi-major axis; C20 = ïôsA-#ð†ãsAClarke gave a and b and also 1/f=293.465 (to 3 decimal places exactly). In the 19th century b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/f"Ellipsoidisch Parameter der Erdfigur (1800-1950)" by Georg Strasser.. In the 19th century b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGPipsoidisch Parameter der Erdfigur (186/26/2008i2008.057isch Parameter der Erdfigur (1800-1950)" by Georg Strasser.. In the 19th century b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/f{Sphere7isch Parameter der Erdfigur (1800-1950)" by Georg Strasser.. In the 19®MXA)#®MXAAuthalic sphere. 1/f is infinite. Superseded by GRS 1980 authalic sphere (code 7047).tury b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/futhalic sphere. 1/f is infinite. Superseded by GRS 1980 authalic sphere (code 7047).tury b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/fOGPalic sphere. 1/f is infinite. Supers6/2/1995sp/2/1995sphere. 1/f is infinite. Superseded by GRS 1980 authalic sphere (code 7047).tury b was normally given as the second defining parameter. gravitational constant GM = 3986005e8 m*m*m/s/s).xactly.d/s.verest's 1830 definition taken as a and 1/f|GRS 1967sphere. 1/f is infinite. Superseded by GRS 1980 authalic sphere (code 7¬TXA)# ùÔeô£r@Adopted by IUGG 1967 Lucerne. Inverse flattening given is derived from geocentric gravitational constant (GM)= 398603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./f"Geodetic Reference System 1967"; International Association of Geodesy special publication number 3; August 1971.8603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fOGPdetic Reference System 1967"; Interna9/19/2002R1996.090 1997.252 1998.320 2002.500ternational Association of Geodesy special publication number 3; August 1971.8603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fAverage Terrestrial System 1977500ternational Association of Geodesy special puÀ¥TXA)#'1¬¤r@verage Terrestrial System 1977500ternational Association of Geodesy special publication number 3; August 1971.8603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fNew Brunswick Geographic Information Corporation land and water information standards manualmber 3; August 1971.8603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fOGPBrunswick Geographic Information Corp7/22/1997i1998.321ick Geographic Information Corporation land and water information standards manualmber 3; August 1971.8603e9 m*m*m/s/s; dynamic form factor (J2) = 0.0010827 and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./f‚Everest (1830 Definition)nformation Corporation land and water information standÍÌÌ<#ôsAx#®Gé'ãsAEverest gave a and b to 2 decimal places and also 1/f=300.8017 (to 4 decimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./f"Ellipsoidisch Parameter der Erdfigur (1800-1950)" by Georg Strasserdecimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fOGPipsoidisch Parameter der Erdfigur (186/26/2008i1997.231 2008.057ameter der Erdfigur (1800-1950)" by Georg Strasserdecimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fƒWGS 721 2008.057ameter der Erdfigur (1800-1950)" by Georg Strasserdecimal placÀ¥TXA)#\Âõ(¤r@GS 721 2008.057ameter der Erdfigur (1800-1950)" by Georg Strasserdecimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fGS 721 2008.057ameter der Erdfigur (1800-1950)" by Georg Strasserdecimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./fOGP721 2008.057ameter der Erdfigur (184/22/199901999.030008.057ameter der Erdfigur (1800-1950)" by Georg Strasserdecimal places exactly). In the 19th century b was normally given as the second defining parameter.and Earth's angular velocity w = 7.2921151467e-5 rad/s. See also GRS 1967 (SAD69)./f„Everest 1830 (1962 Definition)dfigur (1800-1950)" by Georg Strasserdecimal placßOOÕSXA)#è-ÞÓÌr@Used by Pakistan since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded with slight error as 1 Ind ft = 0.3047995m exactly and applied to Everest's 1830 definition of a & b.sed by Pakistan since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded with slight error as 1 Ind ft = 0.3047995m exactly and applied to Everest's 1830 definition of a & b.OGP by Pakistan since metrication. Clar10/20/19990/20/1999istan since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded with slight error as 1 Ind ft = 0.3047995m exactly and applied to Everest's 1830 definition of a & b.…Everest 1830 (1975 Definition)ion. Clarke's 1865 Indian foot-British foot ratioçû©ÉÔSXA)#è-ÞÓÌr@Used by India since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded as 1 Ind ft = 0.3047995m exactly applied to Everest's 1830 original definition taken as a and b. a & b.sed by India since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded as 1 Ind ft = 0.3047995m exactly applied to Everest's 1830 original definition taken as a and b. a & b.OGP by India since metrication. Clarke'10/20/19990/20/1999ia since metrication. Clarke's 1865 Indian foot-British foot ratio (0.99999566) and his 1865 British inch-metre ratio (39.369971) rounded as 1 Ind ft = 0.3047995m exactly applied to Everest's 1830 original definition taken as a and b. a & b.†Bessel Namibia (GLM)etrication. Clarke's 1865 Indian foot-British foot ratio (0…ëIíSXAG#¦Õëq²r@The semi-major axis has the same value as the Bessel 1841 ellipsoid (code 7004) but is in different units - German Legal Metres rather than International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.Chief Directorate: Surveys and Mapping, Mowbray, South Africa.soid (code 7004) but is in different units - German Legal Metres rather than International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPf Directorate: Surveys and Mapping, M9/21/2007c2007.091ctorate: Surveys and Mapping, Mowbray, South Africa.soid (code 7004) but is in different units - German Legal Metres rather than International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.‡GRS 1980 Authalic Spheres and Mapping, Mowbray, South Africa.soid (code 7004) b@MXA)#@MXAAuthalic sphere derived from Clarke 1866 ellipsoid (code 7008). Deprecated as name and parameter values do not match; replaced by 7048.an International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPalic sphere derived from Clarke 1866 ellipsoid (code 7008). Deprecated as name and parameter values do not match; replaced by 7048.an International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPalic sphere derived from Clarke 1866 6/5/2001sp/5/2001sphere derived from Clarke 1866 ellipsoid (code 7008). Deprecated as name and parameter values do not match; replaced by 7048.an International metres - hence a different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.ˆGRS 1980 Authalic Sphererom Clarke 1866 ellipsoid (code 7008). Deprecated as naÀ¯MXA)#À¯MXAAuthalic sphere derived from GRS 1980 ellipsoid (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPalic sphere derived from GRS 1980 ellipsoid (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPalic sphere derived from GRS 1980 ell6/25/2001p/25/2001phere derived from GRS 1980 ellipsoid (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.‰IAG 1975phere derived from GRS 1980 ellipsoid (code 7019). (An authalic sphere§TXA)#'1¬¤r@AG 1975phere derived from GRS 1980 ellipsoid (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.Chinese Sceience Bulletin, 2009, 54:2714-2721. (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.OGPese Sceience Bulletin, 2009, 54:2714-11/24/20092009.0849ience Bulletin, 2009, 54:2714-2721. (code 7019). (An authalic sphere is one with a surface area equal to the surface area of the ellipsoid). 1/f is infinite.different size. a = 6377483.865 International metres. Used in Namibia. b. a & b.ŠGRS 1967 Modifiedulletin, 2009, 54:2714-2721. (code 7019). (An authalic sphere¬TXA)#¤r@Based on the GRS 1967 figure (code 7036) but with 1/f taken to 2 decimal places exactly. Used with SAD69 and TWD67 datums. The dimensions are also used as the Australian National Spheroid (code 7003).65 International metres. Used in Namibia. b. a & b."Geodetic Reference System 1967"; International Association of Geodesy special publication number 3; August 1971. datums. The dimensions are also used as the Australian National Spheroid (code 7003).65 International metres. Used in Namibia. b. a & b.OGPdetic Reference System 1967"; Interna8/11/2008R2008.017Reference System 1967"; International Association of Geodesy special publication number 3; August 1971. datums. The dimensions are also used as the Australian National Spheroid (code 7003).65 International metres. Used in Namibia. b. a & b.‹Danish 1876ference System 1967"; International Association of Geodesy special pu®GÑŽSXA)#Àr@Semi-major axis originally given as 3271883.25 toise. Uses toise to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Kort og Matrikelstyrelsen (KMS), Copenhagen.5 toise. Uses toise to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGP og Matrikelstyrelsen (KMS), Copenhag6/27/2003t/27/2003trikelstyrelsen (KMS), Copenhagen.5 toise. Uses toise to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.ŒClarke 1866 Authalic SphereMS), Copenhagen.5 toise. Uses toise to French metre @MXA)#@MXAAuthalic sphere derived from Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGPalic sphere derived from Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGPalic sphere derived from Clarke 1866 4/27/2004p/27/2004phere derived from Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Hough 1960here derived from Clarke 1866 ellipsoid (code 7008). to French metre €ÇTXA)#r@ough 1960here derived from Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.DMA / NIMA / NGA TR8350.2om Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGP/ NIMA / NGA TR8350.2om Clarke 1866 1/26/2006 /26/2006 / NGA TR8350.2om Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.ŽPZ-90006 / NGA TR8350.2om Clarke 1866 ellipsoid (code 7008). to French metre ¦TXA)##à ¤r@Z-90006 / NGA TR8350.2om Clarke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Geodeziya i Katografiya, 1993.arke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGPeziya i Katografiya, 1993.arke 1866 2/3/2006 i/3/2006 i Katografiya, 1993.arke 1866 ellipsoid (code 7008). to French metre ratio of 1.94903631 to two decimal place precision. An alternative ratio with the German legal metre of 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Clarke 1880 (international foot)ke 1866 ellipsoid (code 7008). to French metre ïôsA*#ð†ãsAClark'es 1880 definition in feet assumed for the purposes of metric conversion to be international foot. a = 6378306.370…metres. 1/f derived from a and b = 293.4663077… Used in Fiji.f 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Department of Lands and Survey, Fiji.ed for the purposes of metric conversion to be international foot. a = 6378306.370…metres. 1/f derived from a and b = 293.4663077… Used in Fiji.f 1.9490622 giving 6377104m has not been used in Danish work.. a & b.OGPrtment of Lands and Survey, Fiji.ed 7/14/2006 /14/2006 of Lands and Survey, Fiji.ed for the purposes of metric conversion to be international foot. a = 6378306.370…metres. 1/f derived from a and b = 293.4663077… Used in Fiji.f 1.9490622 giving 6377104m has not been used in Danish work.. a & b.Everest 1830 (RSO 1969)Survey, Fiji.ed for the purposes of metric conversion toÛù~êÓSXA)#@aÃÓÌr@Adopted for 1969 metrication of peninsula Malaysia RSO grid. Uses Sears 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.Defence Geographic Centreon of peninsula Malaysia RSO grid. Uses Sears 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.OGPnce Geographic Centreon of peninsula7/24/2006o/24/2006ographic Centreon of peninsula Malaysia RSO grid. Uses Sears 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.‘International 1924 Authalic Sphereinsula Malaysia RSO grid. Uses Sears 1922 yarçMXA)#çMXAAuthalic sphere derived from International 1924 ellipsoid (code 7022).s 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.OGPalic sphere derived from International 1924 ellipsoid (code 7022).s 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.OGPalic sphere derived from Internationa9/22/2006p/22/2006phere derived from International 1924 ellipsoid (code 7022).s 1922 yard-metre ratio truncated to 6 significant figures applied to Everest 1830 original definition of a and 1/f but with a taken to be in British rather than Indian feet. a & b.’Hughes 1980ere derived from International 1924 ellipsoid (code 7022).s 1922 yar@ÈTXA)#j¼\æ?XAUsed in US DMSP SSM/I microwave sensor processing software. Semi-minor axis derived from eccentricity=0.081816153. Semi-major axis (a) sometimes given as 3443.992nm which OGP suspects is a derived approximation. OGP conversion assumes 1nm=1852m exactly.US National Snow and Ice Data Centerr processing software. Semi-minor axis derived from eccentricity=0.081816153. Semi-major axis (a) sometimes given as 3443.992nm which OGP suspects is a derived approximation. OGP conversion assumes 1nm=1852m exactly.OGPational Snow and Ice Data Centerr pr9/22/2006l/22/2006l Snow and Ice Data Centerr processing software. Semi-minor axis derived from eccentricity=0.081816153. Semi-major axis (a) sometimes given as 3443.992nm which OGP suspects is a derived approximation. OGP conversion assumes 1nm=1852m exactly.“Popular Visualisation Sphere Centerr processing software. Semi-minor axis deriv@¦TXA)#@¦TXASphere with radius equal to the semi-major axis of the GRS80 and WGS 84 ellipsoids. Used only for Web approximate mapping and visualisation. Not recognised by geodetic authorities.ts is a derived approximation. OGP conversion assumes 1nm=1852m exactly.Microsoft. radius equal to the semi-major axis of the GRS80 and WGS 84 ellipsoids. Used only for Web approximate mapping and visualisation. Not recognised by geodetic authorities.ts is a derived approximation. OGP conversion assumes 1nm=1852m exactly.OGPosoft. radius equal to the semi-majo3/14/20082008.114 radius equal to the semi-major axis of the GRS80 and WGS 84 ellipsoids. Used only for Web approximate mapping and visualisation. Not recognised by geodetic authorities.ts is a derived approximation. OGP conversion assumes 1nm=1852m exactly.