Hello Theo,
From my experience from the
http://lostaircraft.com/database.php?lang=en, the crash location given is not always accurate. For examples, some US losses have as crash location the location written on the first page of the MACR, that was often the "last place seen" rather than the real crash location, while there is in the MACR a German KU report giving the precise crash location.
What is interesting in this database is the Comment Field, where there may be many details, and the Source one.
This database is filled by contributors from the Internet, so entries can be really interesting or totally wrong, as in two other comparable databases on the Net:
http://aviation-safety.net/wikibase/
http://www.crashplace.de/index.php?page=70
(to be honest, I am a member of the admin team of the second, but we have nothing about the above losses)