# Azimuthal Equidistant¶

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

## Options¶

Note

All options are optional for the Azimuthal Equidistant projection.

+guam

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

+lat_0=<value>

Latitude of projection center.

Defaults to 0.0.

Note

The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the “r” character.

Example: +lat_0=1.570796r

+lon_0=<value>

Longitude of projection center.

Defaults to 0.0.

Note

The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the “r” character.

Example: +lon_0=1.570796r

+x_0=<value>

False easting.

Defaults to 0.0.

+y_0=<value>

False northing.

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.