Eckert VI

Classifications

pseudocylindric
equal-area

Graticule

Meridians: Central meridian is a straight line half as long as the equator. Other meridians are equally spaced sinusoids, concave toward the central meridian.
Parallels: Equally spaced straight parallel lines, widest separation near the equator. Perpendicular to the central meridian.
Poles: Lines half as long as the equator.
Symmetry: About the central meridian or the equator.

Scale

True along latitudes 49°16′N and S. Constant along any given latitude; same for the latitude of opposite sign.

Distortion

Free of distortion only at latitudes 49°16N and S. At the central meridian.

Usage

Thematic world maps in Soviet World Atlas of.
Some recent use for climatic maps by U.S. Publishers.
Origin
Presented by Max Eckert (1868-1938) of Germany in 1906.

Similar projections

Eckert V projection has meridians positioned identically, but parallels are equally spaced.
Wagner I projection (1932) is almost identical to Eckert VI, but Wagner I uses only part of the sinusoidal curve.
Kavrayskiy Vl projection (1936) is identical to Wagner I. Werenskiold II projection (1944) is the same as Wagner I, except for scale.
McBryde-Thomas flat-pole sinusoidal uses the full sinusoid and is equal-area, but the poles are one-third the length of the equator.

Description adapted from J.P. Snyder and P.M. Voxland, An Album of Map Projections, U.S. Geological Survey Professional Paper 1453. United States Government Printing Office: 1989.