Are we allowed to extract and publish the full world/mini maps so that others can use them for guides or interactive atlases?
Paragraph two said it's okay as long the context is Larian Studios' games. If you write a guide for the game, of course you can use artwork from the game to illustrate your points. That's my interpretation.
Examples for false use would be to use their arts for your own game or your own fantasy website that has nothing to do with this game at all.
If you however run a fan website dedicated to this game, then you should be fine to extract all valuable textures like maps, paintings, item icons and hidden concept arts that may lay around and publish them on your website. You should however have a section that clears the situation, some disclamer which ideally links to this website.
That at least is my non-professional opinion on the current official statement.
Also almost all new smaller studios know how valuable a good fanbase and especially fan made projects are. By that i mean wikis, interactive tools like a atlas you described or game mods that integrate into the current world.
So hindering you from contributing to their games success sure is far from their intention.
I hope that helps.
with best regards