van der Grinten III
Geocart menu class: Pseudocylindric
Geocart family: van der Grinten
Neither conformal nor equal area
Meridians: Central meridian is straight. Other meridians are circular, equally spaced along the Equator but unequally spaced along other parallels and concave toward the central meridian.
Parallels: Straight lines
Symmetry: About the central meridian or the Equator
True along the Equator. Increases rapidly with distance from the Equator.
Great distortion of area near the poles
The world is enclosed in a circle. Spacing of parallels along the central meridian is the same as that for Van der Crinten I.
World maps, but rarely
Presented by Alphons J. van der Grinten (1852–?) of Chicago in 1904
Van der Grinten I has curved parallels.
“The Times”, by Moir, has nearly elliptical meridians, but straight parallels are spaced like those of the Gall projection.
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.