It has suddenly occurred to me that, while it's difficult to make a hexmap of a spherical body, the common isocahedron provides a ready model for splitting a planet up into regular triangular sectors.
en.wikipedia.org - Dymaxion map - Wikipedia
Fuck! Buckminster Fuller beat me to the punch again!
I wish I had a method of turning the maps I make from Grand Designer to Dymaxion maps
See also: The “World Map Grid” sheets from Traveller , for mapping planets: cartographersguild.com