The Ultima 6 Project: Updated World Maps!
Aletys, from the Ultima 6 Project team emailed me to let me know that the world map, both the spoiler and non-spoiler version, for the project have been refined and updated.
You can find the new versions available for download at the project entry.
She also mentioned that an update to the maps book will be forthcoming at some point in the near future, so keep an eye out for that as well!