/// <summary>
/// The ellps parameter in a proj4 string will only work with certain
/// pre-defined spheroids, enumerated in the Proj4Ellipsoids enumeration.
/// Custom spheroids can be specified but will use the a and b parameters
/// when creating a proj4 parameter instead of using the ellps parameter.
/// </summary>
/// <param name="knownEllipse">Any of several predefined geographic ellipses</param>
public Spheroid(Proj4Ellipsoids knownEllipse)
{
AddNames();
AssignKnownEllipsoid(knownEllipse);
}
/// <summary>
/// The ellps parameter in a proj4 string will only work with certain
/// pre-defined spheroids, enumerated in the Proj4Ellipsoids enumeration.
/// Custom spheroids can be specified but will use the a and b parameters
/// when creating a proj4 parameter instead of using the ellps parameter.
/// </summary>
/// <param name="knownEllipse">Any of several predefined geographic ellipses</param>
public Spheroid(Proj4Ellipsoids knownEllipse)
{
AddNames();
AssignKnownEllipsoid(knownEllipse);
}
private void AssignKnownEllipsoid(Proj4Ellipsoids knownEllipse)
{
_name = knownEllipse.ToString();
_knownEllipsoid = knownEllipse;
switch (knownEllipse)
{
case Proj4Ellipsoids.Airy_1830:
_equatorialRadius = 6377563.396;
_polarRadius = 6356256.910;
break;
case Proj4Ellipsoids.AiryModified:
_equatorialRadius = 6377340.189;
_polarRadius = 6356034.446;
break;
case Proj4Ellipsoids.Andrae_1876:
_equatorialRadius = 6377104.43;
SetInverseFlattening(300);
break;
case Proj4Ellipsoids.AppPhysics_1965:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Austrailia_SouthAmerica:
_equatorialRadius = 6378160.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Bessel_1841:
_equatorialRadius = 6377397.155;
SetInverseFlattening(299.1528128);
break;
case Proj4Ellipsoids.BesselNamibia:
_equatorialRadius = 6377483.865;
SetInverseFlattening(299.1528128);
break;
case Proj4Ellipsoids.Clarke_1866:
_equatorialRadius = 6378206.4;
_polarRadius = 6356583.8;
break;
case Proj4Ellipsoids.ClarkeModified_1880:
_equatorialRadius = 6378249.145;
SetInverseFlattening(293.4663);
break;
case Proj4Ellipsoids.CPM_1799:
_equatorialRadius = 6375738.7;
SetInverseFlattening(334.29);
break;
case Proj4Ellipsoids.Custom: // Default to WGS84
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257223563);
break;
case Proj4Ellipsoids.Delambre_1810:
_equatorialRadius = 6376428;
SetInverseFlattening(311.5);
break;
case Proj4Ellipsoids.Engelis_1985:
_equatorialRadius = 6378136.05;
SetInverseFlattening(298.2566);
break;
case Proj4Ellipsoids.Everest_1830:
_equatorialRadius = 6377276.345;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1948:
_equatorialRadius = 6377304.063;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1956:
_equatorialRadius = 6377301.243;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1969:
_equatorialRadius = 6377295.664;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_SS:
_equatorialRadius = 6377298.556;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Fischer_1960:
_equatorialRadius = 6378166;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Fischer_1968:
_equatorialRadius = 6378150;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.FischerModified_1960:
_equatorialRadius = 6378155;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.GRS_1967:
_equatorialRadius = 6378160.0;
SetInverseFlattening(298.2471674270);
break;
case Proj4Ellipsoids.GRS_1980:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257222101);
break;
case Proj4Ellipsoids.Helmert_1906:
_equatorialRadius = 6378200;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Hough:
_equatorialRadius = 6378270.0;
SetInverseFlattening(297);
break;
case Proj4Ellipsoids.IAU_1976:
_equatorialRadius = 6378140.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.International_1909:
_equatorialRadius = 6378388.0;
SetInverseFlattening(297);
break;
case Proj4Ellipsoids.InternationalNew_1967:
_equatorialRadius = 6378157.5;
_polarRadius = 6356772.2;
break;
case Proj4Ellipsoids.Krassovsky_1942:
_equatorialRadius = 6378245.0;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Kaula_1961:
_equatorialRadius = 6378163;
SetInverseFlattening(298.24);
break;
case Proj4Ellipsoids.Lerch_1979:
_equatorialRadius = 6378139;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.Maupertius_1738:
_equatorialRadius = 6397300;
SetInverseFlattening(191);
break;
case Proj4Ellipsoids.Merit_1983:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.NavalWeaponsLab_1965:
_equatorialRadius = 6378145.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Plessis_1817:
_equatorialRadius = 6376523;
_polarRadius = 6355863;
break;
case Proj4Ellipsoids.SoutheastAsia:
_equatorialRadius = 6378155.0;
_polarRadius = 6356773.3205;
break;
case Proj4Ellipsoids.SovietGeodeticSystem_1985:
_equatorialRadius = 6378136.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.Sphere:
_equatorialRadius = 6370997.0;
_polarRadius = 6370997.0;
break;
case Proj4Ellipsoids.Walbeck:
_equatorialRadius = 6376896.0;
_polarRadius = 6355834.8467;
break;
case Proj4Ellipsoids.WGS_1960:
_equatorialRadius = 6378165.0;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.WGS_1966:
_equatorialRadius = 6378145.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.WGS_1972:
_equatorialRadius = 6378135.0;
SetInverseFlattening(298.26);
break;
case Proj4Ellipsoids.WGS_1984:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257223563);
break;
}
}
private void AssignKnownEllipsoid(Proj4Ellipsoids knownEllipse)
{
_name = knownEllipse.ToString();
_knownEllipsoid = knownEllipse;
switch (knownEllipse)
{
case Proj4Ellipsoids.Airy_1830:
_equatorialRadius = 6377563.396;
_polarRadius = 6356256.910;
break;
case Proj4Ellipsoids.AiryModified:
_equatorialRadius = 6377340.189;
_polarRadius = 6356034.446;
break;
case Proj4Ellipsoids.Andrae_1876:
_equatorialRadius = 6377104.43;
SetInverseFlattening(300);
break;
case Proj4Ellipsoids.AppPhysics_1965:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Austrailia_SouthAmerica:
_equatorialRadius = 6378160.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Bessel_1841:
_equatorialRadius = 6377397.155;
SetInverseFlattening(299.1528128);
break;
case Proj4Ellipsoids.BesselNamibia:
_equatorialRadius = 6377483.865;
SetInverseFlattening(299.1528128);
break;
case Proj4Ellipsoids.Clarke_1866:
_equatorialRadius = 6378206.4;
_polarRadius = 6356583.8;
break;
case Proj4Ellipsoids.ClarkeModified_1880:
_equatorialRadius = 6378249.145;
SetInverseFlattening(293.4663);
break;
case Proj4Ellipsoids.CPM_1799:
_equatorialRadius = 6375738.7;
SetInverseFlattening(334.29);
break;
case Proj4Ellipsoids.Custom: // Default to WGS84
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257223563);
break;
case Proj4Ellipsoids.Delambre_1810:
_equatorialRadius = 6376428;
SetInverseFlattening(311.5);
break;
case Proj4Ellipsoids.Engelis_1985:
_equatorialRadius = 6378136.05;
SetInverseFlattening(298.2566);
break;
case Proj4Ellipsoids.Everest_1830:
_equatorialRadius = 6377276.345;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1948:
_equatorialRadius = 6377304.063;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1956:
_equatorialRadius = 6377301.243;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_1969:
_equatorialRadius = 6377295.664;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Everest_SS:
_equatorialRadius = 6377298.556;
SetInverseFlattening(300.8017);
break;
case Proj4Ellipsoids.Fischer_1960:
_equatorialRadius = 6378166;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Fischer_1968:
_equatorialRadius = 6378150;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.FischerModified_1960:
_equatorialRadius = 6378155;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.GRS_1967:
_equatorialRadius = 6378160.0;
SetInverseFlattening(298.2471674270);
break;
case Proj4Ellipsoids.GRS_1980:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257222101);
break;
case Proj4Ellipsoids.Helmert_1906:
_equatorialRadius = 6378200;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Hough:
_equatorialRadius = 6378270.0;
SetInverseFlattening(297);
break;
case Proj4Ellipsoids.IAU_1976:
_equatorialRadius = 6378140.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.International_1909:
_equatorialRadius = 6378388.0;
SetInverseFlattening(297);
break;
case Proj4Ellipsoids.InternationalNew_1967:
_equatorialRadius = 6378157.5;
_polarRadius = 6356772.2;
break;
case Proj4Ellipsoids.Krassovsky_1942:
_equatorialRadius = 6378245.0;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.Kaula_1961:
_equatorialRadius = 6378163;
SetInverseFlattening(298.24);
break;
case Proj4Ellipsoids.Lerch_1979:
_equatorialRadius = 6378139;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.Maupertius_1738:
_equatorialRadius = 6397300;
SetInverseFlattening(191);
break;
case Proj4Ellipsoids.Merit_1983:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.NavalWeaponsLab_1965:
_equatorialRadius = 6378145.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.Plessis_1817:
_equatorialRadius = 6376523;
_polarRadius = 6355863;
break;
case Proj4Ellipsoids.SoutheastAsia:
_equatorialRadius = 6378155.0;
_polarRadius = 6356773.3205;
break;
case Proj4Ellipsoids.SovietGeodeticSystem_1985:
_equatorialRadius = 6378136.0;
SetInverseFlattening(298.257);
break;
case Proj4Ellipsoids.Sphere:
_equatorialRadius = 6370997.0;
_polarRadius = 6370997.0;
break;
case Proj4Ellipsoids.Walbeck:
_equatorialRadius = 6376896.0;
_polarRadius = 6355834.8467;
break;
case Proj4Ellipsoids.WGS_1960:
_equatorialRadius = 6378165.0;
SetInverseFlattening(298.3);
break;
case Proj4Ellipsoids.WGS_1966:
_equatorialRadius = 6378145.0;
SetInverseFlattening(298.25);
break;
case Proj4Ellipsoids.WGS_1972:
_equatorialRadius = 6378135.0;
SetInverseFlattening(298.26);
break;
case Proj4Ellipsoids.WGS_1984:
_equatorialRadius = 6378137.0;
SetInverseFlattening(298.257223563);
break;
}
}
