# Airy¶

The Airy projection is an azimuthal minimum error projection for the region within the small or great circle defined by an angular distance, $$\phi_b$$, from the tangency point of the plane $$( \lambda_0, \phi_0 )$$.

 Classification Azimuthal Available forms Forward spherical projection Defined area Global Alias airy Domain 2D Input type Geodetic coordinates Output type Projected coordinates

## Options¶

+lat_b

Angular distance from tangency point of the plane $$( \lambda_0, \phi_0 )$$ where the error is kept at minimum.

Defaults to 90° (suitable for hemispherical maps).

+no_cut

Do not cut at hemisphere limit

+lat_0=<value>

Latitude of projection center.

Defaults to 0.0.

+lon_0=<value>

Longitude of projection center.

Defaults to 0.0.

+x_0=<value>

False easting.

Defaults to 0.0.

+y_0=<value>

False northing.

Defaults to 0.0.

+R=<value>

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