The Eckert VI projection, presented by Max Eckert in 1906,
is a pseudocylindrical equal-area projection. Central meridian
and all parallels are straight lines; other meridians are
equally spaced sinusoids. The scale is true along latitudes
49o16'’. Its main use is in thematic world maps.
To use it you must enter
Centered on the Dateline, the example below was created by this command:
pscoast -R0/360/-90/90 -JK180/4.5i -Bg30/g15 -Dc -A10000 -W0.25p -G255 -S200 -P >! GMT_eckert.ps