@verbeeld hi, very cool! Wanted to share I've been doing something very similar since the start of last year. I started doing this reverse geo referencing for hand-drawn tourist maps of towns, but also found it worked well for historical maps. If anyone is in the UK, I've set up maps for London in 1561, Cambridge in 1575, and Oxford in 1605: https://onamap.me/maps/London1561/ https://onamap.me/maps/Cambridge1575/ https://onamap.me/maps/Oxford1605/ I've been posting project updates on a facbook page: https://www.facebook.com/me.onamap