During the Cold War, the Soviet Union is belived to have produced more than 1.1 million topographical maps of the world in scales such as 1:100,000 and 1:50,000.
By Andrein (Own work) [CC BY-SA 3.0 or GFDL], via Wikimedia Commons
Across the world, only a handful of people are keen to study those maps in order to figure out what the Soviet Union had wanted to do with them.