Classifications
equal-area
Graticule
Meridians: Complex curves except for straight central meridian.
Parallels: Portions of ellipses, all with the same eccentricity.
Poles: Points.
Parameters
Standard parallel: Selects the parallel of correct scale.
Similar projections
Sinusoidal projection is a limiting form.
Werner projection is a limiting form.
Heart projection can be closely replicated by the Bottomley projection.
Origin
Presented by Henry Bottomley in 2003 as an alternative to the Bonne projection.