Oh, sorry, I'd just assumed by what you'd done so far that you must've known about that map! Yes, it's the CE edition cloth map, though it was somewhat criticised for being a bit brown and sludgy; it's not
that bad, though admittedly it's not that exciting either. I never attempted to verify exactly how accurate it is. I suspect "a bit".
I'm slightly mystified as to what Silva Larum could mean: I can see where you got "seagull" from but unless it's an in-joke (which of course Larian
never do

) it seems its meaning is a bit more opaque.