Cartagraphic errors
The map shows the Shire at the same latitude as Isengard. Isengard is tens of leagues to the south. Rivendell (Imlandrus) should be due west of the Shire, not north-east as it is shown. Bree is out place, as is Moria. That's just for starters.
It's a neat map, but it has some serious errors.