Hufnagel IX

Classifications

pseudocylindric
equal-area

Graticule

Meridians: Complex curves. Central meridian is straight and half the length of the equator.
Parallels: Straight parallel lines.
Poles: Lines 40.8% the length of the equator.
Symmetry: About the central meridian and the equator.

Scale

Correct along the 40°18′N/S parallels.

Distortion

Free of distortion only at 40°18′N/S on the central meridian.

Similar projections

Extremely similar to Eckert IV but with slightly shorter pole line.

Origin

Presented by Herbert Hufnagel, 1989, who devised the base projection to be highly configurable while always yielding equal-area results. Hufnagel detailed many specializations of the base projection. This is one of those specializations, parameterized as follows:.
ψ[max]: 45°.
A: ⅔.
B: ⅓.
Aspect ratio: ½.

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