I bought the book associated with this post (absolutely beautiful and well-made book), and in it they mention that only civilian maps made available to Soviet c

I bought the book associated with this post (absolutely beautiful and well-made book), and in it they mention that only civilian maps made available to Soviet citizens were purposefully nerfed, but that many Western civilian maps of Soviet cities borrowed data from easily-available Western military maps, so that if you were to somehow buy a map of Moscow at some civilian gas station in Rome (this is my own example to paraphrase), it would have been fairly accurate, and loads more accurate than the maps available to civilians in the Soviet Union.