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Airy

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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 \(( \lambda_0, \phi_0 )\).

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Classification

Azimuthal

Available forms

Forward spherical projection

Defined area

Global

Alias

airy

Domain

2D

Input type

Geodetic coordinates

Output type

Projected coordinates

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+Airy +
+

proj-string: +proj=airy

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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).

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++no_cut
+

Do not cut at hemisphere limit

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++lat_0=<value>
+

Latitude of projection center.

+

Defaults to 0.0.

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++lon_0=<value>
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Longitude of projection center.

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Defaults to 0.0.

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++x_0=<value>
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False easting.

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Defaults to 0.0.

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++y_0=<value>
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False northing.

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Defaults to 0.0.

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++R=<value>
+

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

+

See Ellipsoid size parameters for more information.

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