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Eckert III

Release 9.2
Last modified August 3, 2007
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Description

This pseudo cylindrical projection is used primarily for world maps.

Illustration of Eckert III projection


Projection method

A pseudo cylindrical projection.


Linear graticules

Parallels are equally spaced straight lines. Meridians are equally spaced elliptical curves. The meridians at +/-180° from the central meridian are semicircles. The poles and the central meridian are straight lines half as long as the equator.


Properties


Shape



This stretching decreases to zero at 37°55' N and S. Nearer the poles, features are compressed in the north–south direction.

Area



Area isn't preserved.

Direction



The equator doesn't have any angular distortion. Direction is distorted elsewhere.

Distance



Scale is correct only along 37°55' N and S. Nearer the poles, features are compressed in the north–south direction.


Limitations

Useful only as a world map.


Uses and applications

Suitable for thematic mapping of the world.


Parameters


Desktop





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