Fria Ligans forum

Lantmäteriet have scanned copies of historical maps of large parts of Sweden.
Many from 1860 - 1890.

Down to 1:20 000 scale. The site have an English version to.

https://historiskakartor.lantmateriet.s ... earch.html

Similar from Norway.
https://www.kartverket.no/Kart/Historiske-kart/
Not a whole lot of info in English.
But they do have thousands of historical maps.