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OldInsuranceMaps.net @oldinsurancemaps.net · 1d

If this works

add_raster_source(url={https://oldinsurancemaps.net/map/sanborn09064_003/main-content/tilejson}, id="OIM")

it would be better. Technically the XYZ url could change (if the mosaic file is regenerated), but the TileJSON url will stay the same.

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OldInsuranceMaps.net @oldinsurancemaps.net · 1d

Fantastic :) I only recently realized how useful tilejson is and added it throughout the site. Glad you found it! Now to update the docs.....

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OldInsuranceMaps.net @oldinsurancemaps.net · 1d

Great! What OIM endpoint are you using to get the map?

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Reposted by OldInsuranceMaps.net

Mike O'Brien @obrien.page · 1d

Super easy to use the mapgl package and @oldinsurancemaps.net to compare 1886 Richmond, VA to today in #rstats. The site of Gallego Mills, the ruins of which became an iconic photo after the fall of Richmond in the American Civil War, is now an office building and freeway.

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OldInsuranceMaps.net @oldinsurancemaps.net · 4d

From some recent activity, here's a rare but good example (from Worcester Mass.) of where the Thin Plate Spline transformation makes sense for #georeferencing #sanborn maps. Curved roads out in space are sometimes drawn without good scale and need extra distortion oldinsurancemaps.net/layer/72727

A georeferenced Sanborn map sheet that shows significant distortion (Worcester, Mass., 1950, Vol. 3, p 343 (partial). The map has a few blocks but is distorted near the area of a curved road on the east side of the page.

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OldInsuranceMaps.net @oldinsurancemaps.net · 22d

Often people ask about adding historical photos to OIM (not a planned feature!) so it's awesome to see our maps used in other apps that are made to do just that 😍

MapRVA @maprva.org · 23d

What a fantastic first week of our Georeference Tool! We already have over 500 image georeferences across Richmond, and we're working on importing new datasets!

Our map viewer now allows you to sort by date, and overlay Sanborn insurance maps from the 1900s.

Check it out: georeference.maprva.org

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OldInsuranceMaps.net @oldinsurancemaps.net · 25d

So cool to see new research enabled by existing crowdsourced work on OldInsuranceMaps!

Emma @this-is-emma.bsky.social · 25d

I just found out about this from @resourcefulsqrl.bsky.social and I cannot properly convey my excitement because one of the map sets I need for my book are georeferenced and ready to go and that makes it so much easier as a postdoc who doesn’t have protected research time to make figures.

Adam Cox @mradamcox.bsky.social · 28d

If you are in the New Orleans area, come to one of our upcoming Georeference-a-thons at Second Line Brewing! Tuesday evenings, the 16th and 23rd. RSVP form here: tiny.cc/georef-2025. We'll be focusing on 1895 Duncan Plaza area and hearing from archaeologists who did work there over the summer.

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OldInsuranceMaps.net @oldinsurancemaps.net · 28d

Next week! And the one after. These two-week-in-a-row event are really great for getting a bit more reach.

Adam Cox @mradamcox.bsky.social · 28d

If you are in the New Orleans area, come to one of our upcoming Georeference-a-thons at Second Line Brewing! Tuesday evenings, the 16th and 23rd. RSVP form here: tiny.cc/georef-2025. We'll be focusing on 1895 Duncan Plaza area and hearing from archaeologists who did work there over the summer.

Flyer for two community georeferencing events: Sept 16th & 23rd, at Second Line Brewing in New Orleans, LA.

OldInsuranceMaps.net @oldinsurancemaps.net · Aug 9

New blog post about how OldInsuranceMaps.net uses #gdal fantastic virtual raster format during the georeferencing process. blog.oldinsurancemaps.net/post/2025-08..., also has a link to a recording of my recent I-GUIDE presentation: "A look inside OldInsuranceMaps.net"

OldInsuranceMaps.net

A crowdsourcing site for creating and viewing georeferenced mosaics of historical Sanborn fire insurance maps

OldInsuranceMaps.net

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OldInsuranceMaps.net @oldinsurancemaps.net · Jul 25

This past spring the Community Mapping Lab at University of Georgia used OldInsuranceMaps to host a mapathon, where a large group got together and georeferenced Sanborn maps together. Looks like fun! See their work here: oldinsurancemaps.net/map/sanborn0... #crowdsourcing #sanborn #historicalmaps

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OldInsuranceMaps.net @oldinsurancemaps.net · Jul 14

Come learn about OldInsuranceMaps.net at the I-GUIDE Virtual Consulting Office presentation on Wednesday morning! Really looking forward to doing a more technical talk than I have before: i-guide.io/i-guide-vco/...

A look inside OldInsuranceMaps.net, a crowdsourcing platform for georeferencing historical fire insurance maps : I-GUIDE

i-guide.io

OldInsuranceMaps.net @oldinsurancemaps.net · Jun 22

Big day: Asset storage backend migrated to S3 object storage (wasabi)! github.com/ohmg-dev/Old.... Newsletter coming "soon".

Implement S3 storage compatibility by mradamcox · Pull Request #280 · ohmg-dev/OldInsuranceMaps

Updates the code base to be fully compatible with using an S3 object store-based storage backend, to address #275. Uses storages.backends.s3boto3.S3Boto3Storage from django-storages (v1.13.x for no...

github.com

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Reposted by OldInsuranceMaps.net

kate 🫠 eddie @ktflghm.bsky.social · Jun 15

this is much, much easier than what i was planning to do. thank you! dare i say therapeutic even.

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Reposted by OldInsuranceMaps.net

Jeff Meyer @jeffme.bsky.social · Jun 13

YO 🌯⚖️

@ktflghm.bsky.social - I'd say @openhistoricalmap.org is the closest thing to Pastmapper these days & I even made fun of how little progress has been made since PM's glory days in a slide a few years ago... @mradamcox.bsky.social's oldinsurancemaps.net is my go-to for Sanborn mosaics.

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