One thing you might want to change depending on how important you think characters not knowing the Zuma's borders are is it shows their duchies which shows their borders. Otherwise it looks great and may be able to help with roleplay too.
Why would you not want your character to know that? presumably your character knows what regions are Aurvandil's, Barca's, Terrans, and Asylon's. The area in between all those belongs to the Zuma (or is a rogue region that the Zuma wouldn't like you marching an army into).
