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Eckert IV projection

Eckert IV projection of the world.
Eckert IV projection with Tissot's indicatrices of distortion.

The Eckert IV projection is an equal-area pseudocylindrical map projection. The length of the polar lines is half that of the equator, and lines of longitude are semiellipses, or portions of ellipses. It was first described by Max Eckert in 1906 as one of a series of three pairs of pseudocylindrical projections. Within each pair, meridians are the same whereas parallels differ. Odd-numbered projections have parallels spaced equally, whereas even-numbered projections have parallels spaced to preserve area. Eckert IV is paired with Eckert III.[1]

  1. ^ Cite error: The named reference Snyder89 was invoked but never defined (see the help page).
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