Blog spam (sorta). Original source: http://kai.sub.blue/en/africa.html
While we’re talking about map projections, I’ve long been partial to Cahill’s octahedral maps. Gene Keyes has some derivatives and a comprehensive website about the subject. http://www.genekeyes.com/B.J.S._CAHILL_RESOURCE.html I’ve recently been trying to make some better Cahill spinoffs of my own. Here’s a conformal version: http://i.imgur.com/RhZL1FN.jpg
I found the Cahill projection a few years ago and was disappointed that I couldn't seem to find one in print.
The one I found that seem to resemble it is the Waterman projection which is also available in printed versions.