I wanted to point out it is a crowdsourcing project, so every overlaid page you see has been placed there by a person, often through large institutional efforts at universities, but also individuals just looking to learn about their hometown through these old maps. Thanks for the interest!
Its a similar problem that you faced, stripping off the extra image data from the map, then overlaying them on a base map. I might have a slightly easier time, since these surveys mostly line up to existing township/ranges of the PLSS, not at individual house/street level like the sanborn maps. I've manually done the process many times, most in ArcGIS, but have used a few others (like oldmapsonline). Your site was new to me, and the presentation looks great.
Here's an example of the type of survey I'm working with. https://www.oldmapsonline.org/en/maps/06317a09-5426-41e0-aa8...
Is there a way to quickly search for a specific address or select a point and then see the relevant map? Larger cities have Sanborns covering many volumes, and I see I can use sliders to turn them on and off to find the relevant one, but I wanted to make sure I wasn't missing a quicker way of finding a specific address.
https://oldinsurancemaps.net/map/YK41FR
And this shows no volumes available:
https://oldinsurancemaps.net/viewer/tampa-fl/#/center/-84.77...
Same thing for Key West, FL.
I’ll try running my own and see about importing existing work. Have you thought about extending the public site scope beyond insurance maps?
The maintainer is generalizing outside of Sanborn maps [0].
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