Geocart Projections

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van der Grinten IV

Classification

Geocart menu class: Miscellaneous
Geocart family: van der Grinten
Polyconic
Globular
Neither conformal nor equal area

Graticule

Meridians: Central meridian is straight. Other meridians are circular, equally spaced along the Equator and concave toward the central meridian.
Parallels: Equator is straight. Other parallels are circular, equally spaced on the central meridian and concave toward the nearest pole.
Poles: Points
Symmetry: About the central meridian or the Equator

Scale

True along the central meridian and the Equator

Distortion

Great distortion of area near the 180th meridians at higher latitudes

Other features

The 90th meridians form a complete circle.

Usage

World maps, but rarely

Origin

Presented by Alphons J. van der Grinten (1852–?) of Chicago in 1904

Other names

“Apple Shaped”

Similar projections

Eisenlohr is conformal.
August Epicycloidal is conformal.

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.