Map Coordinates?

[Charge]

Open map_regions.tga and place black (RGB 0,0,0) pixel in a new position (remove previous one), same with port (RGB 255,255,255). They should be in the same province if you didn't know..

New provinces here https://forums.totalwar.org/vb/showthread.php?t=51387

[Dol Guldur]

You can use the show_cursorstat Romeshell command to punch out the co-ords on the display of the area the cursor is over.