"It turns out, mapmakers do have a trick up their sleeve to stop this from happening. It’s a centuries-old method that enables them not only to spot when their work has been stolen, but also, if necessary, to be able to prove it in a court of law."https://lithub.com/did-you-know-mapmakers-used-to-make-up-fake-towns-in-order-to-catch-plagiarists/