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Cahill Conformal M-shaped Projection


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  Cahill Conformal M-shaped Projection
Creator Bernard J. S. Cahill, Oscar S. Adams (1929 approx.)
Group Polyhedral
Property Conformal
Other Names
Remarks In 1909, Cahill developed his first (compromise) butterfly map. He succeeded in having Oscar S. Adams develop the mathematics for a conformal version, which he published in 1929.
In Cahill’s original arrangement, Africa was placed in the leftmost lobe, the map shown here was centered on 20° West.

As far as I know, there’s no established name for the M-shaped variant shown here. The label Cahill Conformal M-shaped Projection was chosen by me for the use on this website.

See Four conformal polyhedric projections and more.

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