My wife asked me for a higher-res map of Isger for use in a VTT. I made one out of
two excellent maps released on Reddit. Just in case this helps someone else, here you go!
Essentially all credit goes to the cartographer; the original maps are by by Rob McCaleb.
I'm not 100% sure what the licensing status of the original maps is (CC or otherwise) but I did receive permission to share this.