CoordinateConversion Class

Namespace: Meziantou.Framework.Geo
Assembly: Meziantou.Framework.Geo.dll
Package: Meziantou.Framework.Geo 1.0.1
Source: CoordinateConversion.cs
Available in package assets: net10.0net11.0

The projection of a ProjectedCoordinateSystem: converts the longitudes and latitudes of an ellipsoid to eastings and northings in meters, as the map projection methods of the EPSG dataset define them.

public abstract class CoordinateConversion

Remarks

Derive from this class to support another projection method. The angles are in radians, the longitudes measured from the prime meridian of the geographic coordinate system; the eastings and the northings are in meters, the false easting and the false northing included.

Constructors

Name	Description
CoordinateConversion()	Initializes a new instance of the `CoordinateConversion` class.

CoordinateConversion()

CoordinateConversion.cs

Initializes a new instance of the CoordinateConversion class.

protected CoordinateConversion()

Properties

Name	Description
CentralMeridian	Gets the longitude of the origin (the central meridian), in degrees from the prime meridian. The default is 0.
FalseEasting	Gets the easting of the origin, in meters. The default is 0.
FalseNorthing	Gets the northing of the origin, in meters. The default is 0.
LatitudeOfOrigin	Gets the latitude of the origin of the northings (the latitude of the false origin of a Lambert conformal conic projection), in degrees. The default is 0.

CentralMeridian

CoordinateConversion.cs

Gets the longitude of the origin (the central meridian), in degrees from the prime meridian. The default is 0.

public double CentralMeridian { get; init; }

Property value

double

FalseEasting

CoordinateConversion.cs

Gets the easting of the origin, in meters. The default is 0.

public double FalseEasting { get; init; }

Property value

double

FalseNorthing

CoordinateConversion.cs

Gets the northing of the origin, in meters. The default is 0.

public double FalseNorthing { get; init; }

Property value

double

LatitudeOfOrigin

CoordinateConversion.cs

Gets the latitude of the origin of the northings (the latitude of the false origin of a Lambert conformal conic projection), in degrees. The default is 0.

public double LatitudeOfOrigin { get; init; }

Property value

double

Methods

Name	Description
Project(double, double, Ellipsoid)	Projects a longitude and a latitude.
Unproject(double, double, Ellipsoid)	Converts an easting and a northing back to a longitude and a latitude: the inverse of `CoordinateConversion.Project`.

Project(double, double, Ellipsoid)

Projects a longitude and a latitude.

public abstract (double Easting, double Northing) Project(double lambda, double phi, Ellipsoid ellipsoid)

Parameters

lambda double: The longitude from the prime meridian, in radians.
phi double: The latitude, in radians.
ellipsoid Ellipsoid: The ellipsoid of the longitudes and the latitudes.

Returns

(double Easting, double Northing) The easting and the northing, in meters.

Unproject(double, double, Ellipsoid)

Converts an easting and a northing back to a longitude and a latitude: the inverse of CoordinateConversion.Project.

public abstract (double Lambda, double Phi) Unproject(double easting, double northing, Ellipsoid ellipsoid)

Parameters

easting double: The easting, in meters.
northing double: The northing, in meters.
ellipsoid Ellipsoid: The ellipsoid of the longitudes and the latitudes.

Returns

(double Lambda, double Phi) The longitude from the prime meridian and the latitude, in radians.