The Shadow World Master Atlas (4th edition) contains information on all continents of Kulthea, not just Emer and Jaiman. Sure, much of that is intentionally vague, but certain things are given with which to flesh out an area further.
However, there is no map of all of Kulthea that does more than denominate the continents and their base geography in the book. However, for selecting your campaign area to flesh out on your own, that would be quite helpful. Is there any document or publication that has this? Or is one planned?