How a karma-seeking Redditor uncovered one of the world’s rarest atlases

A reference librarian at the National Library of Norway came across an old Ottoman atlas in the collections there that seemed perfect for a Reddit board devoted to the appreciation of maps. Weeks later, he figured out that the map in question was a previously-unknown copy of one of the rarest atlases in the world: the Cedid Atlas.
Read more: http://snapzu.com/gladsdotter/how-a-karma-seeking-redditor-uncovered-one-of-the-worlds-rarest-atlases