Draft version of Cahill-Keyes “Real-World” Map, 1984. Actual scale of original digital image  is 1/100 million. This map is adapted from B.J.S. Cahill’s octahedral “Butterfly” projection,  published in 1909. The graticule was newly devised, computed, and drawn by Gene Keyes  in 1975, along with the coastlines, boundaries, and overall map design. Image courtesy of  Gene Keyes.