The map of Dagori Inkarth from Trollpak was IMO the best single campaign map Chaosium ever published. Even better than the Elder Wilds maps from Griffin Mountain. Clear, informative, and with loads of details, it set a high bar.
With the Dragon Pass maps coming out with the Sartar Homeland book, we’ve more than beat that bar. Just compare the old map with the new. So much more detail, so much more information, but it keeps the same wonderful clear style of the old Chaosium map.