Chamberlin trimetric projection of Africa. Base points (22°N, 0°), (22°N, 45°E), (22°S, 22.5°E).
The Chamberlin trimetric projection compromises between distortions of area, direction and distance.
It is constructed by triangulating points on the sphere relative to three fixed base points, shown above in red.
Available as d3.geo.chamberlin.