I would like to create a world map "upside down", with the South on top (in Mapnik).
How can I achieve this?
Can I take an existing projection string, e.g. Robinson projection, ESRI:54030.
+proj=robin +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs
and flip/mirror it? So the North will point down.