[WikiEN-l] The principle of fair use

[Jens Frank]

Hello,

I understood that a few seconds of music are "fair use",
we do not distribute the entire song but only a sample
suitable to give a first impression. 

I somewhat understood why a picture of Donald Duck is
"fair use". We are not in the same business as Disney,
we are writing an encyclopedia and not comic books.

But I can't understand why this
http://www.wikipedia.org/wiki/Image%3A843-870_Europe.jpg
is fair use. The map has been created for an encyclopedia
or an history textbook. If this is fair use, is there any
picture we may not use?

JeLuF