This module is really excellent on so many levels . . when I get a chance, I'll elaborate.
But for now, I've read it again whilst looking at the map included in the module and also looked at the old Erde map as well as the section maps from the Codex of Erde.
Today, I pulled out the newer Aihrde map which has lots of detail for this area in the module.
It's really a great section of this world with so many cool locations, castles, fortresses, towns, mountain passes - etc. for loads of adventuring opportunities.
Great module, even if the CK doesn't use the runes or runemark class (for me, it is too much for an online game - better for a face to face tabletop game session).