I think the "problem" is that this represents a fantasy world (d&d setting) which has its specials.
The "tree-problem" is not really big because the trees are only "icons whisch stand for "woods" in common,
they should not represent a tree for every tree at the map.
The "Nebelländer" is an area which is covered by fog (part of the setting-story)
So it is not my intention to show a geological correct map. However, i thank all of you for your comments so far!
(I hope you can understand my crapy english ;-))