Directory of Map Projections

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complex latitude plane

Wallis 1 transverse Mercator

Classifications

cylindric
conformal

Aspect

One possible transverse development for the ellipsoidal transverse Mercator.

Graticule

Meridians: Central meridian is straight; others are complex curves.
Parallels: Complex curves, evenly spaced along the central meridian.

Scale

Infinite at the top/bottom extremities. The full map cannot be shown.

Distortion

Low near the central meridian, increasing away from it.

Similar projections

The ellipsoidal transverse Mercator is finite and has parallels correctly (but not evenly) spaced along the central meridian.
Wallis 2 transverse Mercator is finite and similar until reaching the extremities.

Origin

R. König and K.H. Weise discuss and illustrate the projection in 1951. The projection arises as a step in one method of producing the ellipsoidal transverse Mercator. It is also a step in a method devised by Dr. David E. Wallace in the 1980s.

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