If you’re bemoaning the lack of open geographical data in your country, the following should give you pause. In Russia, public maps are limited to a scale of 1:100,000, with secret installations “cleansed”; higher-resolution maps are considered state secrets, their possession punishable by law. There is a move afoot to declassify maps down to a scale of 1:25,000, which some consider insufficient. A spooky look at the implications of secrecy.