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Classes Datum, Ellipsoid and Transform and registries thereof Datums, Ellipsoids and Transforms, respectively.
Pure Python implementation of geodesy tools for ellipsoidal earth models, including datums and ellipsoid parameters for different geographic coordinate systems and methods for converting between them and to cartesian coordinates. Transcribed from JavaScript originals by (C) Chris Veness 2005-2016 and published under the same MIT Licence**, see latlon-ellipsoidal.js.
Historical geodetic datums: a latitude/longitude point defines a geographic location on or above/below the earth’s surface, measured in degrees from the equator and the International Reference Meridian and meters above the ellipsoid, and based on a given datum. The datum is based on a reference ellipsoid and tied to geodetic survey reference points.
Modern geodesy is generally based on the WGS84 datum (as used for instance by GPS systems), but previously various reference ellipsoids and datum references were used.
The UK Ordnance Survey National Grid References are still based on the otherwise historical OSGB36 datum, q.v. Ordnance Survey 'A guide to coordinate systems in Great Britain', Section 6.
Version: 20.02.07
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Ellipsoid Ellipsoid with major and minor radius, semi-axis, (inverse) flattening and other pre-computed, frequently used attributes. |
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Transform Helmert transformation. |
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Datum Ellipsoid and transform parameters for an earth model. |
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R_M = 6371008.77141 Mean (spherical) earth radius ( meter ).
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R_MA = 6378137.0 Major (equatorial) earth radius ( meter ) WGS84,
EPSG:3785.
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R_MB = 6356752.0 Minor (polar) earth radius ( meter ) WGS84, EPSG:3785.
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R_KM = 6371.00877142 Mean (spherical) earth radius ( KM , kilo meter).
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R_NM = 3440.06953447 Mean (spherical) earth radius ( NM , nautical miles).
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R_SM = 3958.75339537 Mean (spherical) earth radius ( SM , statute miles).
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R_FM = 6371000.0 Former FAI Sphere earth radius ( meter ).
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R_VM = 6366707.01949 Aviation/Navigation earth radius ( meter ).
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__all__ = _ALL_LAZY.datum
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Ellipsoids = Ellipsoids.Airy1830: Ellipsoid(name='Airy1830', a Registered ellipsoids. |
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Transforms = Transforms.BD72: Transform(name='BD72', tx=106.86 Registered transforms. |
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Datums = Datums.BD72: Datum(name='BD72', ellipsoid=Ellipsoids. Registered datums. |
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Datums.BD72 Datum(name='BD72', ellipsoid=Ellipsoids.Intl1924, transform=Transforms.BD72) |
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Datums.DHDN Datum(name='DHDN', ellipsoid=Ellipsoids.Bessel1841, transform=Transforms.DHDN) |
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Datums.ED50 Datum(name='ED50', ellipsoid=Ellipsoids.Intl1924, transform=Transforms.ED50) |
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Datums.GDA2020 Datum(name='GDA2020', ellipsoid=Ellipsoids.GRS80, transform=Transforms.WGS84) |
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Datums.GRS80 Datum(name='GRS80', ellipsoid=Ellipsoids.GRS80, transform=Transforms.WGS84) |
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Datums.Irl1975 Datum(name='Irl1975', ellipsoid=Ellipsoids.AiryModified, transform=Transforms.Irl1975) |
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Datums.Krassovski1940 Datum(name='Krassovski1940', ellipsoid=Ellipsoids.Krassovski1940, transform=Transforms.Krassovski1940) |
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Datums.Krassowsky1940 Datum(name='Krassowsky1940', ellipsoid=Ellipsoids.Krassowsky1940, transform=Transforms.Krassowsky1940) |
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Datums.MGI Datum(name='MGI', ellipsoid=Ellipsoids.Bessel1841, transform=Transforms.MGI) |
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Datums.NAD27 Datum(name='NAD27', ellipsoid=Ellipsoids.Clarke1866, transform=Transforms.NAD27) |
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Datums.NAD83 Datum(name='NAD83', ellipsoid=Ellipsoids.GRS80, transform=Transforms.NAD83) |
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Datums.NTF Datum(name='NTF', ellipsoid=Ellipsoids.Clarke1880IGN, transform=Transforms.NTF) |
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Datums.OSGB36 Datum(name='OSGB36', ellipsoid=Ellipsoids.Airy1830, transform=Transforms.OSGB36) |
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Datums.Potsdam Datum(name='Potsdam', ellipsoid=Ellipsoids.Bessel1841, transform=Transforms.Bessel1841) |
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Datums.Sphere Datum(name='Sphere', ellipsoid=Ellipsoids.Sphere, transform=Transforms.WGS84) |
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Datums.TokyoJapan Datum(name='TokyoJapan', ellipsoid=Ellipsoids.Bessel1841, transform=Transforms.TokyoJapan) |
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Datums.WGS72 Datum(name='WGS72', ellipsoid=Ellipsoids.WGS72, transform=Transforms.WGS72) |
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Datums.WGS84 Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Transforms.WGS84) |
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Ellipsoids.Airy1830 Ellipsoid(name='Airy1830', a=6377563.396, b=6356256.909, f_=299.3249646, f=0.003340851, e=0.081673374, e2=0.00667054, e12=0.99332946, e22=0.006715335, n=0.00167322, R1=6370461.233666666, R2=6370459.654589442, R3=6370453.309866445, Rr=6366914.608805893, Rs=6366901.239881964) |
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Ellipsoids.AiryModified Ellipsoid(name='AiryModified', a=6377340.189, b=6356034.448, f_=299.3249646, f=0.003340851, e=0.081673374, e2=0.00667054, e12=0.99332946, e22=0.006715335, n=0.00167322, R1=6370238.275333334, R2=6370236.696361165, R3=6370230.351810658, Rr=6366691.774649803, Rs=6366678.406194146) |
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Ellipsoids.Australia1966 Ellipsoid(name='Australia1966', a=6378160, b=6356774.719, f_=298.25, f=0.003352892, e=0.08182018, e2=0.006694542, e12=0.993305458, e22=0.006739661, n=0.001679261, R1=6371031.573, R2=6371029.982388151, R3=6371023.591178183, Rr=6367471.848433915, Rs=6367458.38162583) |
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Ellipsoids.Bessel1841 Ellipsoid(name='Bessel1841', a=6377397.155, b=6356078.962818, f_=299.1528128, f=0.003342773, e=0.081696831, e2=0.006674372, e12=0.993325628, e22=0.006719219, n=0.001674185, R1=6370291.090939333, R2=6370289.510126558, R3=6370283.158215224, Rr=6366742.520233163, Rs=6366729.136254413) |
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Ellipsoids.CPM1799 Ellipsoid(name='CPM1799', a=6375738.7, b=6356671.92557493, f_=334.39, f=0.00299052, e=0.077279343, e2=0.005972097, e12=0.994027903, e22=0.006007977, n=0.001497499, R1=6369383.108524977, R2=6369381.843415799, R3=6369376.762470212, Rr=6366208.881847335, Rs=6366198.174663714) |
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Ellipsoids.Clarke1866 Ellipsoid(name='Clarke1866', a=6378206.4, b=6356583.8, f_=294.978698214, f=0.003390075, e=0.082271854, e2=0.006768658, e12=0.993231342, e22=0.006814785, n=0.001697916, R1=6370998.866666667, R2=6370997.240632997, R3=6370990.706598808, Rr=6367399.689168951, Rs=6367385.921655473) |
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Ellipsoids.Clarke1880 Ellipsoid(name='Clarke1880', a=6378249.145, b=6356514.86954978, f_=293.465, f=0.003407561, e=0.0824834, e2=0.006803511, e12=0.993196489, e22=0.006850116, n=0.001706689, R1=6371004.386516593, R2=6371002.743669633, R3=6370996.141916499, Rr=6367386.643979664, Rs=6367372.733858579) |
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Ellipsoids.Clarke1880IGN Ellipsoid(name='Clarke1880IGN', a=6378249.2, b=6356515, f_=293.466021294, f=0.00340755, e=0.082483257, e2=0.006803488, e12=0.993196512, e22=0.006850092, n=0.001706683, R1=6371004.466666666, R2=6371002.823831111, R3=6370996.22212394, Rr=6367386.736672513, Rs=6367372.826648208) |
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Ellipsoids.Clarke1880Mod Ellipsoid(name='Clarke1880Mod', a=6378249.145, b=6356514.96582849, f_=293.4663, f=0.003407546, e=0.082483218, e2=0.006803481, e12=0.993196519, e22=0.006850086, n=0.001706681, R1=6371004.418609496, R2=6371002.775777077, R3=6370996.174082516, Rr=6367386.692077904, Rs=6367372.782080163) |
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Ellipsoids.Delambre1810 Ellipsoid(name='Delambre1810', a=6376428, b=6355957.92616372, f_=311.5, f=0.003210273, e=0.080063974, e2=0.00641024, e12=0.99358976, e22=0.006451596, n=0.001607717, R1=6369604.642054573, R2=6369603.184197493, R3=6369597.327390675, Rr=6366197.076842674, Rs=6366184.735554905) |
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Ellipsoids.Engelis1985 Ellipsoid(name='Engelis1985', a=6378136.05, b=6356751.32272154, f_=298.2566, f=0.003352818, e=0.081819276, e2=0.006694394, e12=0.993305606, e22=0.006739511, n=0.001679224, R1=6371007.807573847, R2=6371006.217070852, R3=6370999.826135725, Rr=6367448.175078915, Rs=6367434.70891814) |
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Ellipsoids.Everest1969 Ellipsoid(name='Everest1969', a=6377295.664, b=6356094.667915, f_=300.8017, f=0.003324449, e=0.081472981, e2=0.006637847, e12=0.993362153, e22=0.006682202, n=0.001664992, R1=6370228.665305, R2=6370227.101785341, R3=6370220.819516171, Rr=6366699.578394239, Rs=6366686.341077896) |
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Ellipsoids.Fisher1968 Ellipsoid(name='Fisher1968', a=6378150, b=6356768.33724438, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371022.77908146, R2=6371021.189037352, R3=6371014.799950343, Rr=6367463.656043012, Rs=6367450.193774211) |
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Ellipsoids.GEM10C Ellipsoid(name='GEM10C', a=6378137, b=6356752.31424783, f_=298.2572236, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371008.771415944, R2=6371007.180919358, R3=6371000.790010039, Rr=6367449.145823942, Rs=6367435.679717519) |
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Ellipsoids.GRS67 Ellipsoid(name='GRS67', a=6378160, b=6356774.516, f_=298.247167427, f=0.003352924, e=0.081820568, e2=0.006694605, e12=0.993305395, e22=0.006739725, n=0.001679277, R1=6371031.505333333, R2=6371029.914708731, R3=6371023.523359839, Rr=6367471.747019209, Rs=6367458.279955242) |
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Ellipsoids.GRS80 Ellipsoid(name='GRS80', a=6378137, b=6356752.314140347, f_=298.257222101, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371008.771380115, R2=6371007.180883513, R3=6371000.789974131, Rr=6367449.145770246, Rs=6367435.679663688) |
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Ellipsoids.Helmert1906 Ellipsoid(name='Helmert1906', a=6378200, b=6356818.16962789, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371072.723209296, R2=6371071.133152724, R3=6371064.744015628, Rr=6367513.572269944, Rs=6367500.10989561) |
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Ellipsoids.IERS1989 Ellipsoid(name='IERS1989', a=6378136, b=6356751.302, f_=298.257, f=0.003352813, e=0.081819221, e2=0.006694385, e12=0.993305615, e22=0.006739502, n=0.001679222, R1=6371007.767333333, R2=6371006.176906484, R3=6370999.785917024, Rr=6367448.139705879, Rs=6367434.673581903) |
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Ellipsoids.IERS1992TOPEX Ellipsoid(name='IERS1992TOPEX', a=6378136.3, b=6356751.61659215, f_=298.257223563, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371008.072197382, R2=6371006.481700972, R3=6371000.090792353, Rr=6367448.446995611, Rs=6367434.980890662) |
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Ellipsoids.IERS2003 Ellipsoid(name='IERS2003', a=6378136.6, b=6356751.85797165, f_=298.25642, f=0.00335282, e=0.081819301, e2=0.006694398, e12=0.993305602, e22=0.006739515, n=0.001679225, R1=6371008.352657217, R2=6371006.762152168, R3=6371000.371208764, Rr=6367448.71770978, Rs=6367435.251531576) |
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Ellipsoids.Intl1924 Ellipsoid(name='Intl1924', a=6378388, b=6356911.946, f_=297, f=0.003367003, e=0.08199189, e2=0.00672267, e12=0.99327733, e22=0.00676817, n=0.001686341, R1=6371229.315333334, R2=6371227.711270464, R3=6371221.265832124, Rr=6367654.499992855, Rs=6367640.919007843) |
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Ellipsoids.Intl1967 Ellipsoid(name='Intl1967', a=6378157.5, b=6356772.2, f_=298.24961539, f=0.003352896, e=0.081820233, e2=0.00669455, e12=0.99330545, e22=0.00673967, n=0.001679263, R1=6371029.066666666, R2=6371027.476083895, R3=6371021.084827519, Rr=6367469.33894366, Rs=6367455.872106339) |
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Ellipsoids.Krassovski1940 Ellipsoid(name='Krassovski1940', a=6378245, b=6356863.01877305, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371117.67292435, R2=6371116.08285656, R3=6371109.693674386, Rr=6367558.496874185, Rs=6367545.034404869) |
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Ellipsoids.Krassowsky1940 Ellipsoid(name='Krassowsky1940', a=6378245, b=6356863.01877305, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371117.67292435, R2=6371116.08285656, R3=6371109.693674386, Rr=6367558.496874185, Rs=6367545.034404869) |
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Ellipsoids.Maupertuis1738 Ellipsoid(name='Maupertuis1738', a=6397300, b=6363806.28272251, f_=191, f=0.005235602, e=0.102194876, e2=0.010443793, e12=0.989556207, e22=0.010554017, n=0.002624672, R1=6386135.42757417, R2=6386131.541448465, R3=6386115.886282292, Rr=6380564.130113637, Rs=6380531.163818629) |
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Ellipsoids.Mercury1960 Ellipsoid(name='Mercury1960', a=6378166, b=6356784.28360711, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371038.76120237, R2=6371037.171154276, R3=6371030.782051236, Rr=6367479.629235634, Rs=6367466.166933062) |
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Ellipsoids.Mercury1968Mod Ellipsoid(name='Mercury1968Mod', a=6378150, b=6356768.33724438, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371022.77908146, R2=6371021.189037352, R3=6371014.799950343, Rr=6367463.656043012, Rs=6367450.193774211) |
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Ellipsoids.NWL1965 Ellipsoid(name='NWL1965', a=6378145, b=6356759.76948868, f_=298.25, f=0.003352892, e=0.08182018, e2=0.006694542, e12=0.993305458, e22=0.006739661, n=0.001679261, R1=6371016.58982956, R2=6371014.999254003, R3=6371008.60802666, Rr=6367456.873667615, Rs=6367443.406891448) |
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Ellipsoids.OSU86F Ellipsoid(name='OSU86F', a=6378136.2, b=6356751.51693008, f_=298.2572236, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371007.972310026, R2=6371006.381813641, R3=6370999.990905124, Rr=6367448.347164505, Rs=6367434.88105977) |
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Ellipsoids.OSU91A Ellipsoid(name='OSU91A', a=6378136.3, b=6356751.6165948, f_=298.2572236, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371008.072198267, R2=6371006.481701856, R3=6371000.090793238, Rr=6367448.446996935, Rs=6367434.98089199) |
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Ellipsoids.Plessis1817 Ellipsoid(name='Plessis1817', a=6376523, b=6355862.93325557, f_=308.64, f=0.003240021, e=0.080433474, e2=0.006469544, e12=0.993530456, e22=0.006511671, n=0.001622639, R1=6369636.31108519, R2=6369634.826085826, R3=6369628.859996674, Rr=6366197.15710669, Rs=6366184.585664447) |
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Ellipsoids.SGS85 Ellipsoid(name='SGS85', a=6378136, b=6356751.30156878, f_=298.257, f=0.003352813, e=0.081819221, e2=0.006694385, e12=0.993305615, e22=0.006739502, n=0.001679222, R1=6371007.767189593, R2=6371006.176690875, R3=6370999.785772962, Rr=6367448.13949045, Rs=6367434.673365931) |
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Ellipsoids.SoAmerican1969 Ellipsoid(name='SoAmerican1969', a=6378160, b=6356774.71919531, f_=298.25, f=0.003352892, e=0.08182018, e2=0.006694542, e12=0.993305458, e22=0.006739661, n=0.001679261, R1=6371031.573065103, R2=6371029.982485807, R3=6371023.591243432, Rr=6367471.848531487, Rs=6367458.38172365) |
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Ellipsoids.Sphere Ellipsoid(name='Sphere', a=6371008.771415, b=6371008.771415, f_=0, f=0, e=0, e2=0, e12=1, e22=0, n=0, R1=6371008.771415, R2=6371008.771415, R3=6371008.771415, Rr=6371008.771415, Rs=6371008.771415) |
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Ellipsoids.SphereAuthalic Ellipsoid(name='SphereAuthalic', a=6371000, b=6371000, f_=0, f=0, e=0, e2=0, e12=1, e22=0, n=0, R1=6371000, R2=6371000, R3=6371000, Rr=6371000, Rs=6371000) |
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Ellipsoids.SpherePopular Ellipsoid(name='SpherePopular', a=6378137, b=6378137, f_=0, f=0, e=0, e2=0, e12=1, e22=0, n=0, R1=6378137, R2=6378137, R3=6378137, Rr=6378137, Rs=6378137) |
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Ellipsoids.Struve1860 Ellipsoid(name='Struve1860', a=6378298.3, b=6356657.14266956, f_=294.73, f=0.003392936, e=0.082306499, e2=0.00677436, e12=0.99322564, e22=0.006820565, n=0.001699351, R1=6371084.580889854, R2=6371082.952089875, R3=6371076.406914177, Rr=6367482.318324657, Rs=6367468.527348378) |
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Ellipsoids.WGS60 Ellipsoid(name='WGS60', a=6378165, b=6356783.28695944, f_=298.3, f=0.00335233, e=0.081813334, e2=0.006693422, e12=0.993306578, e22=0.006738525, n=0.001678979, R1=6371037.762319813, R2=6371036.172271968, R3=6371029.783169931, Rr=6367478.630911095, Rs=6367465.168610634) |
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Ellipsoids.WGS66 Ellipsoid(name='WGS66', a=6378145, b=6356759.76948868, f_=298.25, f=0.003352892, e=0.08182018, e2=0.006694542, e12=0.993305458, e22=0.006739661, n=0.001679261, R1=6371016.58982956, R2=6371014.999254003, R3=6371008.60802666, Rr=6367456.873667615, Rs=6367443.406891448) |
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Ellipsoids.WGS72 Ellipsoid(name='WGS72', a=6378135, b=6356750.52, f_=298.26, f=0.003352779, e=0.081818811, e2=0.006694318, e12=0.993305682, e22=0.006739434, n=0.001679205, R1=6371006.84, R2=6371005.249530816, R3=6370998.858745317, Rr=6367447.24861499, Rs=6367433.78276368) |
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Ellipsoids.WGS84 Ellipsoid(name='WGS84', a=6378137, b=6356752.31425, f_=298.257223563, f=0.003352811, e=0.081819191, e2=0.00669438, e12=0.99330562, e22=0.006739497, n=0.00167922, R1=6371008.771416667, R2=6371007.180920884, R3=6371000.790010764, Rr=6367449.145825027, Rs=6367435.679718607) |
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Transforms.BD72 Transform(name='BD72', tx=106.86863, ty=-52.29778, tz=103.72389, rx=-0, ry=-0, rz=-0.00001, s=1.2727, s1=1, sx=-0.33657, sy=-0.45696, sz=-1.84218) |
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Transforms.Bessel1841 Transform(name='Bessel1841', tx=-582, ty=-105, tz=-414, rx=-0.00001, ry=-0, rz=0.00001, s=-8.3, s1=0.99999, sx=-1.04, sy=-0.35, sz=3.08) |
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Transforms.Clarke1866 Transform(name='Clarke1866', tx=8, ty=-160, tz=-176, rx=0, ry=0, rz=0, s=0, s1=1, sx=0, sy=0, sz=0) |
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Transforms.DHDN Transform(name='DHDN', tx=-591.28, ty=-81.35, tz=-396.39, rx=0.00001, ry=-0, rz=-0.00001, s=-9.82, s1=0.99999, sx=1.477, sy=-0.0736, sz=-1.458) |
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Transforms.ED50 Transform(name='ED50', tx=89.5, ty=93.8, tz=123.1, rx=0, ry=0, rz=0, s=-1.2, s1=1, sx=0, sy=0, sz=0.156) |
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Transforms.Irl1965 Transform(name='Irl1965', tx=-482.53, ty=130.596, tz=-564.557, rx=0.00001, ry=0, rz=0, s=-8.15, s1=0.99999, sx=1.042, sy=0.214, sz=0.631) |
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Transforms.Irl1975 Transform(name='Irl1975', tx=-482.53, ty=130.596, tz=-564.557, rx=-0.00001, ry=-0, rz=-0, s=-1.1, s1=1, sx=-1.042, sy=-0.214, sz=-0.631) |
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Transforms.Krassovski1940 Transform(name='Krassovski1940', tx=-24, ty=123, tz=94, rx=-0, ry=0, rz=0, s=-2.423, s1=1, sx=-0.02, sy=0.26, sz=0.13) |
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Transforms.Krassowsky1940 Transform(name='Krassowsky1940', tx=-24, ty=123, tz=94, rx=-0, ry=0, rz=0, s=-2.423, s1=1, sx=-0.02, sy=0.26, sz=0.13) |
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Transforms.MGI Transform(name='MGI', tx=-577.326, ty=-90.129, tz=-463.92, rx=0.00002, ry=0.00001, rz=0.00003, s=-2.423, s1=1, sx=5.137, sy=1.474, sz=5.297) |
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Transforms.NAD27 Transform(name='NAD27', tx=8, ty=-160, tz=-176, rx=0, ry=0, rz=0, s=0, s1=1, sx=0, sy=0, sz=0) |
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Transforms.NAD83 Transform(name='NAD83', tx=1.004, ty=-1.91, tz=-0.515, rx=0, ry=0, rz=0, s=-0.0015, s1=1, sx=0.0267, sy=0.00034, sz=0.011) |
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Transforms.NTF Transform(name='NTF', tx=-168, ty=-60, tz=320, rx=0, ry=0, rz=0, s=0, s1=1, sx=0, sy=0, sz=0) |
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Transforms.OSGB36 Transform(name='OSGB36', tx=-446.448, ty=125.157, tz=-542.06, rx=-0, ry=-0, rz=-0, s=20.4894, s1=1.00002, sx=-0.1502, sy=-0.247, sz=-0.8421) |
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Transforms.TokyoJapan Transform(name='TokyoJapan', tx=148, ty=-507, tz=-685, rx=0, ry=0, rz=0, s=0, s1=1, sx=0, sy=0, sz=0) |
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Transforms.WGS72 Transform(name='WGS72', tx=0, ty=0, tz=-4.5, rx=0, ry=0, rz=0, s=-0.22, s1=1, sx=0, sy=0, sz=0.554) |
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Transforms.WGS84 Transform(name='WGS84', tx=0, ty=0, tz=0, rx=0, ry=0, rz=0, s=0, s1=1, sx=0, sy=0, sz=0) |
Variables Details |
EllipsoidsRegistered ellipsoids.
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TransformsRegistered transforms.
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DatumsRegistered datums.
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