Equal Area Cylindrical¶

Classification	Cylindrical
Available forms	Forward and inverse, spherical and ellipsoidal
Defined area	Global
Alias	cea
Domain	2D
Input type	Geodetic coordinates
Output type	Projected coordinates

Parameters¶

Note

All parameters are optional for the Equal Area Cylindrical projection.

+lat_ts=<value>¶

Latitude of true scale. Defines the latitude where scale is not distorted. Takes precedence over +k_0 if both options are used together.

Defaults to 0.0.

+lon_0=<value>¶

Longitude of projection center.

Defaults to 0.0.

+ellps=<value>¶

The name of a built-in ellipsoid definition.

See Ellipsoids for more information, or execute proj -le for a list of built-in ellipsoid names.

Defaults to “GRS80”.

+R=<value>¶

Radius of the sphere, given in meters. If used in conjunction with +ellps, +R takes precedence.

See Ellipsoid size parameters for more information.

+k_0=<value>¶

Scale factor. Determines scale factor used in the projection.

Defaults to 1.0.

+x_0=<value>¶

False easting.

Defaults to 0.0.

+y_0=<value>¶

False northing.

Defaults to 0.0.

Note

lat_ts and k_0 are mutually exclusive. If lat_ts is specified, it is equivalent to setting k_0 to \(\frac{\cos \phi_{ts}}{\sqrt{1 - e^2 \sin^2 \phi_{ts}}}\)