Azimuthal Equidistant

Classification Azimuthal
Available forms Forward and inverse, spherical and elliptical projection
Alias aeqd
Domain 2D
Input type Geodetic coordinates
Output type Projected coordinates
Azimuthal Equidistant

proj-string: +proj=aeqd



All options are optional for the Azimuthal Equidistant projection.


Use Guam elliptical formulas. Only accurate near the Island of Guam (\(\lambda\approx 144.5^{\circ}\), \(\phi\approx 13.5^{\circ}\))


Scale factor. Determines scale factor used in the projection.

Defaults to 1.0.


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.


Latitude of projection center.

Defaults to 0.0.


Longitude of projection center.

Defaults to 0.0.


False easting.

Defaults to 0.0.


False northing.

Defaults to 0.0.


See proj -le for a list of available ellipsoids.

Defaults to “GRS80”.


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