trapezoidal

Parameters: Standard parallel 1, Standard parallel 2

Classifications

pseudocylindric

Graticule

Meridians: Straight, with an angle at the equator.
Parallels: Straight parallel lines.
Poles: Points if one of the standard parallels is a pole; lines otherwise.
Symmetry: About the central meridian and the equator.

Scale

Scale is correct along the two standard parallels.

Distortion

Depends on parameterization, but generally high angular deformation.

Parameters

Standard parallel 1 and standard parallel 2, setting the latitudes along which scale is correct.

Usage

Generally considered obsolete. It appeared frequently in Ptolemeic atlases in the 15th and 16th centuries.

Origin

Possibly used by Hipparchus about 150 B.C. And definitely by Conrad of Dyffenbach in 1426. Donnus Nicolaus Germanus claimed to have invented it in 1482, and the projection is often attributed to him.

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