The Van der Grinten projection, presented by Alphons J. van der Grinten in 1904, is neither equal-area nor conformal. Central meridian and Equator are straight lines; other meridians are arcs of circles. The scale is true along the Equator only. Its main use is to show the entire world enclosed in a circle. To use it you must enter
Centered on the Dateline, the example below was created by this command:
pscoast -Rg -JV180/4i -Bg30/g15 -Dc -Glightgray -A10000 -W0.25p -P > GMT_grinten.ps