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Eckert I

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Classification

Pseudocylindrical

Available forms

Forward and inverse, spherical projection

Defined area

Global

Alias

eck1

Domain

2D

Input type

Geodetic coordinates

Output type

Projected coordinates

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+Eckert I +
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proj-string: +proj=eck1

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+\[ \begin{align}\begin{aligned}x &= 2 \sqrt{2/3\pi} \lambda (1- |\phi|/\pi)\\y &= 2 \sqrt{2/3\pi}\phi\end{aligned}\end{align} \]
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Parameters

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Note

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All parameters are optional for the Eckert I projection.

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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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++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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