Ellipsoid
Public / Constants
Airy_Modified_1849
Airy Modified 1849
Semi major axis: 6377340.189 (Metre)
Inverse flattening: 299.3249646
Australian_National_Spheroid
Australian National Spheroid
Semi major axis: 6378160 (Metre)
Inverse flattening: 298.25
Average_Terrestrial_System_1977
Average Terrestrial System 1977
Semi major axis: 6378135 (Metre)
Inverse flattening: 298.257
Bessel_Modified
Bessel Modified
Semi major axis: 6377492.018 (Metre)
Inverse flattening: 299.1528128
Clarke_1880_Arc
Clarke 1880 (Arc)
Semi major axis: 6378249.145 (Metre)
Inverse flattening: 293.4663077
Clarke_1880_Benoit
Clarke 1880 (Benoit)
Semi major axis: 6378300.789 (Metre)
Semi minor axis: 6356566.435 (Metre)
Clarke_1880_IGN
Clarke 1880 (IGN)
Semi major axis: 6378249.2 (Metre)
Semi minor axis: 6356515 (Metre)
Clarke_1880_international_foot
Clarke 1880 (international foot)
Semi major axis: 20926202 (Foot)
Semi minor axis: 20854895 (Foot)
Clarke_1880_SGA_1922
Clarke 1880 (SGA 1922)
Semi major axis: 6378249.2 (Metre)
Inverse flattening: 293.46598
Everest_1830_1937_Adjustment
Everest 1830 (1937 Adjustment)
Semi major axis: 6377276.345 (Metre)
Inverse flattening: 300.8017
Everest_1830_1962_Definition
Everest 1830 (1962 Definition)
Semi major axis: 6377301.243 (Metre)
Inverse flattening: 300.8017255
Everest_1830_1967_Definition
Everest 1830 (1967 Definition)
Semi major axis: 6377298.556 (Metre)
Inverse flattening: 300.8017
Everest_1830_1975_Definition
Everest 1830 (1975 Definition)
Semi major axis: 6377299.151 (Metre)
Inverse flattening: 300.8017255
Everest_1830_Modified
Everest 1830 Modified
Semi major axis: 6377304.063 (Metre)
Inverse flattening: 300.8017
Everest_1830_RSO_1969
Everest 1830 (RSO 1969)
Semi major axis: 6377295.664 (Metre)
Inverse flattening: 300.8017
Indonesian_National_Spheroid
Indonesian National Spheroid
Semi major axis: 6378160 (Metre)
Inverse flattening: 298.247
Public / Methods
GeographicScale
Returns the approximate scale factor from the given geographic unit opt to the metric unit of the ellipsoid.
The returned scale factor has the highest precision at the equator.
- See also
RadiusOfConformalSphere
Radius of conformal sphere: RC
This is a function of latitude and therefore not constant. When used for spherical projections the use of CoordinateOperationParameter.Latitude (or CoordinateOperationParameter.Parallel1 as relevant to method) for phi in is suggested, except if the projection is equal area when RadiusOfAuthalicSphere should be used.
RadiusOfCurvatureInTheMeridian
Radius of curvature in the meridian: rho
Radius of curvature of the ellipsoid in the plane of the meridian at latitude phi in.