Bonne projection

[1]: 92  Although named after Rigobert Bonne (1727–1795), the projection was in use prior to his birth, by Sylvanus in 1511, Honter in 1561, De l'Isle before 1700 and Coronelli in 1696.

Both Sylvanus and Honter's usages were approximate, however, and it is not clear they intended to be the same projection.

[1]: 60 The Bonne projection maintains accurate shapes of areas along the central meridian and the standard parallel, but progressively distorts away from those regions.

[1]: 61 The projection is defined as: where and φ is the latitude, λ is the longitude, λ0 is the longitude of the central meridian, and φ1 is the standard parallel of the projection.

On the central meridian and the standard latitude shapes are not distorted.