Quote Originally Posted by mapomatic View Post
Finding this article was a real relief. I was starting to think I was the only person interested in making up projections.

How would I go a stage further and define my own projection for the map? By that I mean not a tweak to Winkle Tripel, Gnomonic nor Peirce Quincuncial, but an equation that I type in to define the form that the map takes?
That requires writing an implementation and including it in Proj4. For instance, this is what the implementation of Lambert Conformal Conic looks like https://github.com/OSGeo/proj.4/blob...r/src/PJ_lcc.c