Old Insurance Maps – Georeferencing Sanborn Fire Insurance Maps on Modern Maps

Re:Old Insurance Maps – Georeferencing Sanborn Fire Insuranc... by bduhan on Wednesday February 04, 2026 @02:07PM (#46890202)

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?

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Re:Old Insurance Maps – Georeferencing Sanborn Fire Insuranc... by okok3857 on Wednesday February 04, 2026 @03:38PM (#46891350)

Yes, at certain points, like when I made that ohmg.dev website, I have looked at this as a re-deployable platform that anyone could self-host. It still technically is, but I've slowed down a lot on that idea (no one really showed up with interest). There are other good places to georeference maps on the web, like mapwarper.net and allmaps.org. That said, I do hope to expand to handle import of other atlases, not only Sanborns, and if you have something particular in mind you can mention it here: https://github.com/ohmg-dev/OldInsuranceMaps/issues/266

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Re:Old Insurance Maps – Georeferencing Sanborn Fire Insuranc... by lapetitejort on Wednesday February 04, 2026 @02:10PM (#46890238)

> 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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