The whole map is nice, but all the details are splendid !!!
I love the way you worked the perspective... The houses are amazing (so much of them and so different)... The city walls are great, very well rendered, with the help of the shadows... I love the coasts too !
You did a great job with this one !
Did you use 3D for the accuracy of perspective and details ?
Anyway : Congratulations !
And I prefer a lot your colors to the one in the game !

edit : ... I seldom agree with Kell about colors...