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Central Meridian: Straight line (includes meridian opposite the central meridian in one continuous line).

Other Meridians: Straight lines if 90º from central meridian, complex curves concave toward the central meridian otherwise.

Parallels: Complex curves concave toward the nearest pole.

Poles: Points along the central meridian.

Symmetry: About any straight meridian or the Equator.

This is a perspective projection from the center of the Earth
onto a cylinder tangent to the central meridian. It is not equal-area,
equidistant, or conformal. Scale is true along the central meridian
and constant between two points equidistant in *x* and *y* from
the central meridian. There is no distortion along the central meridian,
but it increases rapidly away from the central meridian in the *y*-direction.

For cylindrical projections, only one standard parallel is specified.
The other standard parallel is the same latitude with the opposite
sign. For this projection, which is the transverse aspect of the Central
Cylindrical, the standard parallel *of the base projection* is
by definition fixed at 0º.

This is the transverse aspect of the Central Cylindrical projection discussed by J. Wetch in the early 19th century.

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