A4

Classifications

lenticular

Graticule

Meridians: Central meridian is a straight line 65.5% as long as the equator. Other meridians are complex curves equally spaced along the equator and concave toward the central meridian.
Parallels: Complex curves convex toward the straight equator. Perpendicular to the central meridian.
Poles: Lines 33.3% as long as the equator.
Symmetry: About the central meridian and the equator.

Scale

Nowhere correct.

Distortion

Free of distortion nowhere. Distortion is largely in the form of angular deformation except for a mild tip in the balance toward inflation near the central meridian in the vicinity of the 60°N/S parallels.

Similar projections

Winkel tripel has less rounded “shoulders” and a longer pole-line.
Cabot and Winkel II are two pseudocylindric projections with a similar outline but differing length of pole lines.

Origin

Presented by Bernhard Jenny in 2008. The name is due to the proportions chosen to fit well on an A4 sheet of paper in landscape orientation.

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