"Back in the days when people would use paper maps to navigate, you'd never find house number 17" What? Did you see the picture of the paper map of the village

"Back in the days when people would use paper maps to navigate, you'd never find house number 17" What? Did you see the picture of the paper map of the village in the article? You just go to the building marked 17 on the map. Maybe you'd need to ask someone to get yourself oriented, but you could also use the house numbers for the houses you can see to orient yourself just fine.