interesting, termur and the lost lands I knew as those had used existing lore from ultima, but the others? Where did you find that, those explanations don't fit with the origional ultima series explanations of those places (Serpent isle was reached by boat by simply sailing to it for instance) so it was at least somewhat changed from their origional incarnations. I tend to go off things from the single player utlima series when possible as most post-LB UO tends to read like poorly written fanfic of a Ultima/LOTR mashup so it helps to hear the locations that these places are "supposed" to be.
The Lost Lands are unique to UO, it's not Eodon from Savage Empire. Acording to Designer Dragon, the Lost Lands were meant to be a piece of the 5th continent, Ambrosia.
Tokuno was
stated to be the Lands of the Fuedal Lords, and it bears a decent resembence to the mainline Ultima continent allowing for land changes over time. (
Ultima Map)
Ilshenar being the Lands of Danger & Despair is based on decuction: It has a wall of lights, lore ablut Balance, and snake imagery is hidden throughout. Serpent Isle in Ultima was reached via the Serpent Pillars (i.e. magic), not "sailing" from point A to point B. Ignore the Meer/Juka history retconning. (
Ultima Map)
Malas had really, really crappy fiction to go with it - what little there is. The Lands of the Dark Unknown fit with what we know of Malas the best, and there is a resemblence between the two. (
Ultima Map)
UO didn't adhere very strictly to Ultima in the early days, hence the changes. We've also been told that the Shattering affected the shard's landmasses moreseo than on Sosaria Prime. Sadly, UO's original map was never realized - it had all four continents...