Bonne Projection Bonne Projection Summary Pseudoconical. Central meridian is a straight line. Other meridians are complex curves.
Parallels are concentric circular arcs, but the poles are points.
Scale is true along the central meridian and along all parallels. No distortion along the central meridian and along the standard parallel. Used for atlas maps of continents and for topographic mapping of some countries. Sinusoidal projection is equatorial limiting form of Bonne projection. Used considerably by Bonne in mid-18th century, but developed by others during the early 16th century.