I developed and maintain this site so I am both very happy to see it get posted here and also watching htop intently...

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!

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bduhan 31 minutes ago | parent | next [-]

Great work! I started georeferencing old plat maps and aerial photographs from my area in QGIS and realized quickly it would be hard to ask other for help without a platform like this.

I’ll try running my own and see about importing existing work. Have you thought about extending the public site scope beyond insurance maps?

	▲	lapetitejort 28 minutes ago \| parent [-]
		> Have you thought about extending the public site scope beyond insurance maps? The maintainer is generalizing outside of Sanborn maps [0]. [0]: https://www.ohmg.dev/

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garciansmith 4 hours ago | parent | prev | next [-]

Thanks for making this, I look at Sanborns all the time doing historic preservation-related work.

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.

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okok3857 3 hours ago | parent [-]

Great question: no. I've spent a lot more time making the georeferencing side of things work well than improving search and discovery, and even presentation (like the /viewer/ pages), of the maps on the site. It's something I hope to spend a lot more time on in the coming months. I know, dealing with those sliders is pretty cumbersome in big cities with many volumes (like SF).

	▲	garciansmith 2 hours ago \| parent [-]
		Gotcha, no problem, just wanted to make sure I wasn't missing some obvious way. Still a super useful tool, thanks again.

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dmd 2 hours ago | parent | prev | next [-]

Do you use IIIF for this? Do you know about https://allmaps.org/ ?

	▲	okok3857 an hour ago \| parent [-]
		No (or, not yet...) and yes, I know the Allmaps team well--it is an excellent project. There are a lot of similarities, but I would say two high-level differences are 1) OIM is built around server-side processing that immediately produces downloadable files and web services (geotiffs) while Allmaps applies a client-side transformation to non-geo IIIF tiles, and 2) OIM is designed around the creation of mosaics from many different pages to a greater extent than Allmaps is. This year I do see bringing more IIIF/Allmaps tooling into OIM though, so stay tuned!

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selimthegrim 3 hours ago | parent | prev [-]

Hi Adam! Adam runs really fun events where you get to help him annotate the maps if you’re ever in the New Orleans area

	▲	okok3857 3 hours ago \| parent [-]
		Hi! I added a page about "georeference-a-thons" recently here: https://oldinsurancemaps.net/community-georeferencing/