Ellipsoid Class
A slightly flattened sphere that represents the Earth in a GeodeticDatum.
Namespace: Carmenta.Engine
NuGet/Assembly: Carmenta.Engine.5.16.2.nupkg (in the CECore assembly)
NuGet/Assembly: Carmenta.Engine.5.16.2.nupkg (in the CECore assembly)
Thread safety: Members defined in this class are thread-safe. Show
Syntax
public class Ellipsoid : ResourceObjectRemarks
For large scale mapping, the Earth is always modelled an oblate (flattened) ellipsoid, not a sphere. An oblate ellipsoid is what you get if you rotate an ellipse around its minor axis. The best-fitting ellipsoid differs from the Earth surface (the mean sea level, or the geoid) by no more than 106 meters. In contrast, the best-fitting sphere would differ by up to 10 700 meters.
For historical reasons, many different ellipsoids are used in cartography and GIS. Most ellipsoids listed in the EPSG database are available as static properties of the Ellipsoid type.
An Ellipsoid object is not used by itself, but is a part of a GeodeticDatum, which is part of a Crs; see the class diagram.
Inheritance Hierarchy
System.Object (not available in C#)
EngineObject
ResourceObject
Ellipsoid
Platforms
Windows, Linux, Android
Ellipsoid Members
The Ellipsoid type has the following members.
Constructors
| Name | Description |
|---|---|
| Ellipsoid | Creates a new Ellipsoid from equatorial radius and inverse flattening. |
Properties
| Name | Description |
|---|---|
 Airy1830 | Gets the predefined ellipsoid Airy 1830, used in Great Britain and Ireland. |
| AiryModified1849 | Gets the predefined ellipsoid Airy Modified 1849, used in Ireland. |
| AustralianNationalSpheroid | Gets the predefined ellipsoid Australian National Spheroid, used in Australia, Brazil and Taiwan. |
| Authority | Gets the name of an authority, which is often epsg. |
| AuthorityCode | Gets the unique code for the ellipsoid instance, according to the Authority, for example "7004". |
| Bessel1841 | Gets the predefined ellipsoid Bessel 1841, used in Europe, Japan, Korea, Indonesia and Eritrea. |
| BesselNamibia | Gets the predefined ellipsoid Bessel Namibia. |
| BesselNorway | Gets the predefined ellipsoid Bessel Norway. |
| Clarke1858 | Gets the predefined ellipsoid Clarke 1858, used in Hong Kong, Trinidad and Tobago. |
| Clarke1866 | Gets the predefined ellipsoid Clarke 1866, used mainly in North America, the Pacific Ocean, Mozambique, and Congo-Kinshasa. |
| Clarke1880 | Gets the predefined ellipsoid Clarke 1880, used in Jamaica. |
| Clarke1880Arc | Gets the predefined ellipsoid Clarke 1880 (Arc), used in southern Africa. |
| Clarke1880Benoit | Gets the predefined ellipsoid Clarke 1880 (Benoit), used in Israel, Jordan and the Palestine Territory. |
| Clarke1880Ign | Gets the predefined ellipsoid Clarke 1880 (IGN), used in France and Africa. |
| Clarke1880Rgs | Gets the predefined ellipsoid Clarke 1880 (RGS), used on Barbados, in Africa, and around the Persian Gulf. |
| EquatorialRadius | Gets the equatorial radius a, in meters. |
| Everest1830_1937Adjustment | Gets the predefined ellipsoid Everest 1830 (1937 Adjustment), used in South Asia and Mainland Southeast Asia. |
| Everest1830_1962Definition | Gets the predefined ellipsoid Everest 1830 (1962 Definition), used in Pakistan. |
| Everest1830_1967Definition | Gets the predefined ellipsoid Everest 1830 (1967 Definition), used in East Malaysia and Brunei. |
| Everest1830_1975Definition | Gets the predefined ellipsoid Everest 1830 (1975 Definition), used in India. |
| Everest1830Definition | Gets the predefined ellipsoid Everest (1830 Definition), used in Bangladesh, India, Burma and Pakistan. |
| Everest1830Modified | Gets the predefined ellipsoid Everest 1830 Modified, used in West Malaysia and Singapore. |
| Everest1830Rso1969 | Gets the predefined ellipsoid Everest 1830 (RSO 1969), used in West Malaysia and Singapore. |
| Grs1967 | Gets the predefined ellipsoid GRS 1967, used in Hungary. |
| Grs1967Modified | Gets the predefined ellipsoid GRS 1967 Modified, used in Brazil, Taiwan and Australia. |
| Grs1980 | Gets the predefined ellipsoid GRS 1980, for practical purposes the same as the WGS 84 ellipsoid. Used worldwide. |
| Helmert1906 | Gets the predefined ellipsoid Helmert 1906, used in Egypt, Qatar, and the United Arab Emirates. |
| IndonesianNationalSpheroid | Gets the predefined ellipsoid Indonesian National Spheroid. |
| International1924 | Gets the predefined ellipsoid International 1924, used worldwide. |
| InverseFlattening | Gets the inverse flattening 1/f (dimensionless). |
| IsDisposed | Gets a value that tells whether the current Ellipsoid has been disposed. Inherited from EngineObject |
| Krassowsky1940 | Gets the predefined ellipsoid Krassowsky 1940, used in the Warsaw Pact countries as well as in China, Vietnam, Laos, South Yemen and Somalia. |
| Name | Gets or sets the name of the Ellipsoid. Inherited from ResourceObject |
| NativeHandle | Gets the native Carmenta Engine kernel object the current Ellipsoid represents. Inherited from EngineObject |
| Plessis1817 | Gets the predefined ellipsoid Plessis 1817, used in France. |
| Pz90 | Gets the predefined ellipsoid PZ-90, used worldwide with GLONASS, the Russian navigation satellite system. |
| IUserProperties.UserProperties | Gets the AttributeSet that contains the user properties. Inherited from IUserProperties |
| WarOffice | Gets the predefined ellipsoid War Office, used in Ghana and Sierra Leone. |
| Wgs72 | Gets the predefined ellipsoid WGS 72, used worldwide by GPS before 1987, and still used on Fiji. |
| Wgs84 | Gets the predefined ellipsoid WGS 84, used worldwide. |
| Xian1980 | Gets the predefined ellipsoid Xian 1980, also known as IAG 1975, used in China. |
Methods
| Name | Description |
|---|---|
| Clone | Creates a copy of an object. Inherited from EngineObject |
| Dispose | Releases the reference to the native Carmenta Engine kernel instance the EngineObject represents. Inherited from EngineObject |
| Equals | Determines whether this instance is equal to another. Inherited from EngineObject |