That Soviet spies created detailed topographic maps of the world, including their Cold War enemies, is not news. Wired had a feature on the maps last year, and I’ve been aware of the work of John Davies and Alex Kent on the subject for more than a decade.
But for some unexplained reason interest in Soviet maps has had a bit of a resurgence lately. Elliot Carter writes about the Soviet maps of Washington, D.C., and their myriad little errors at Architect of the Capital
Finally, Davies and Kent have written a book, The Red Atlas: How the Soviet Union Secretly Mapped the World, which, they say, will be coming from the University of Chicago Press in September 2017.