@ Jurri : well, I suppose that the terrain repartition is not always "logical". And I didn't know if it was possible to mix several terrains in one province (forest + mountain + farmland for ex.). My feeling about these imaginary lands was more important than geography, it's true.
@ Frank Trollman : is it really that important to you ?? It is simply to avoid ex aequo (15/15). And also because in my mind, the sunken island is very important, and deserve the max amount of VP. Don't forget that it is in the water, and that you can't play a sea-nation. (btw, it's very easy to modify this the way you like in the map file)
Thanks everyone for trying the map !