I want to project a map as being rotated by x degrees (as opposed to the standard "north is up" orientation).
So far I'm able to get some arbitrary rotation using these projections:
Two Point Equidistant as used in this Gist
+proj=tpeqd +lat_1=35 +lat_2=35 +lon_1=-80 +lon_2=-122 +x_0=0 +y_0=0 +ellps=WGS84 +units=m +no_defs
Azimuthal as described here: Rotating ~90° using Two-Point Equidistant projection with Proj4
+proj=aeqd +ellps=sphere +lat_0=90 +lon_0=-90
However, I'm having trouble actually converting a value in degrees (like 45°) to a corresponding PROJ.4 string for a specific map. Can anyone point me in the right direction?
EDIT: I'm using Mapnik to render the maps.