David StarkI extracted over 400 images of hills, trees, mountains, towns and cities for #ttrpg mapmaking and #gamedev from a 17th century map. I hope this is useful to someone. https://zarkonnen.itch.io/extracted-1688-map-images
If you have other public domain maps with other kinds of interesting features you'd like me to process like this, let me know.
frd💾@Zarkonnen Not quite what you're looking for, but K.M. Alexander is also releasing map brush packs under CC0 license: https://kmalexander.com/free-stuff/fantasy-map-brushes/
@FredBednarski Oh these are really cool, thanks for linking!