Prompted by a conversation with my father eons ago, I'm researching and experimenting how to create a map in a discontinuous or interrupted projection. Initially I was thinking of Buckminster Fuller's Dymaxion Map, but I've since chosen a variant of the Bernard J. S. Cahill's Butterfly Map, the Cahill-Keyes M-style.

• Technical notes and specification - http://www.genekeyes.com/CKOG-OOo/1-...rinciples.html
• my code repository of same - https://bitbucket.org/maphew/cahill-keyes/

• GIS Exchange Q on Discontinuous projections in open source GIS

• MJ's work reproduced