Thanks for sharing. I went through a similar process recently, manually stitching together fire insurance maps from my hometown. A large part of the business district burned down in 1916, but maps from a couple of years earlier survived. It worked, but it was tedious. This would have saved a lot of time. Here's the link if anyone wants to check it out: https://fire.gorch.com/
okok3857|26 days ago
[0] https://oldinsurancemaps.net/more-about-sanborn-maps/
jojohack|23 days ago