I was perusing through my personal Facebook page and came across a post from Matthew Bracken. Matthew is a fellow author and former SEAL. He wrote Enemies Foreign And Domestic, Domestic Enemies: The Reconquista, Foreign Enemies And Traitors, and Castigo Cay. I've read them all and they are rather enjoyable.
Anyway, he shared an article from PetaPixel.com regarding topographical maps. I love these types of maps as they are invaluable when hiking, camping, hunting, etc. Now, given the genre in which I target my books, it goes without saying that this type of map would be invaluable for land purchases, recon patrols, defensive postures, etc.
Many people that read books or watch shows or listen to podcasts geared toward self-sufficiency, self-reliance, and the dystopian genre refer to their immediate area as their AO, or Area of Operations. Knowing the terrain is an essential part of understanding and working your AO to your advantage and to someone else's disadvantage.
According to the article, National Geographic has managed to merge previously unformatted USGS maps with the regular Johnny Homeowner printer. This means that now, instead of having to search for a map and locate your exact location on their grid, you can now just zoom in on your needed location, AO, hunting ground, etc. and simply print the area you need.
Here's the article name and link if you're interested (Just click it... you know you're gonna click it!): Nat Geo Launched a Free Website for Printing Detailed Topographical Maps.