Flickr: The Maps From Memory Pool [Waxy]
This reminds me two things. First, it brings to mind the Parish Maps project of Common Ground and its emphasis on a, for a lack of a better phrase for it, vernacular of mapping.
It also brings to mind how drawing from memory gives a brutally accurate account of one's real memory, as opposed to what we think we know. Want proof? Just try drawing a map of the middle east from memory. After that, try this quiz to see if that help you learn some geography.