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 |
proj-string: +proj=airy¶
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,+Rtakes precedence.See Ellipsoid size parameters for more information.