Introduction - If you have any usage issues, please Google them yourself
Bonne projection that pseudo equal area conic projection. Penner was created by Frenchman. Central meridian is a straight line, the other warp threads are symmetrical to the central meridian curve. Weft concentric arcs. No deformation of the central meridian and standard parallels, leave these two lines farther deformation greater. All parallels remain the same length on the map, an area equal. Bonne projection used as continents map.