Interesting. From the description I was assuming it was attempts to map out (existing) fictional places (e.g. Westeros) based on descriptions in fiction. Which would probably devolve into contentious arguments about the locations of everything. Creating a fictional world via a map... I'm imagining it will mostly just end up as a series of random features that grow increasingly detailed (at least until the owner of each chunk gets bored with it). I'm wondering how much more of a sense of place and history will be invested in the maps over what would be there simply by generating the maps with some software.