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¶
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+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.