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Equal Earth

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New in version 5.2.0.

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Classification

Pseudo cylindrical

Available forms

Forward and inverse, spherical and ellipsoidal projection

Defined area

Global

Alias

eqearth

Domain

2D

Input type

Geodetic coordinates

Output type

Projected coordinates

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+Equal Earth +
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proj-string: +proj=eqearth

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The Equal Earth projection is intended for making world maps. Equal Earth is a +projection inspired by the Robinson projection, but unlike +the Robinson projection retains the relative size of areas. The projection +was designed in 2018 by Bojan Savric, Tom Patterson and Bernhard Jenny [Savric2018].

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Usage

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The Equal Earth projection has no special options. Here is +an example of an forward projection on a sphere with a radius of 1 m:

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$ echo 122 47 | src/proj +proj=eqearth +R=1
+1.55    0.89
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Parameters

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Note

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All parameters for the projection are optional.

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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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++ellps=<value>
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The name of a built-in ellipsoid definition.

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See Ellipsoids for more information, or execute +proj -le for a list of built-in ellipsoid names.

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Defaults to “GRS80”.

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

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See Ellipsoid size parameters for more information.

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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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Further reading

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  1. Bojan Savric, Tom Patterson & Bernhard Jenny (2018). The Equal Earth map projection, International Journal of Geographical Information Science

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