You can examine their modern military maps; there's many of them (staged) in backgrounds of random KCNA photos. I.e. this "big board",

https://www.rferl.org/a/korea-evacuation-kim-/24951984.html

https://www.nbcnews.com/news/world/who-north-koreas-secretiv...

I don't know why one wouldn't expect their military to have modern cartography, in the internet era.