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Adam Cox @mradamcox.bsky.social · 2d

Debugging help is indispensable!

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Adam Cox @mradamcox.bsky.social · 2d

Unsurprisingly it was a CORS error... everything is _always_ a CORS error. It works now!

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Adam Cox @mradamcox.bsky.social · 2d

(account switching) hm, good findings, I was just getting this up and running in R. I'll compare the details of these responses and should be able to alter the OIM response to work better. Some of those response headers don't need to be included in tilejson so I should clean that up anyway.

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Reposted by Adam Cox

OldInsuranceMaps.net @oldinsurancemaps.net · 5d

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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Adam Cox @mradamcox.bsky.social · 11d

My eyes just glaze over and I hit enter until all of those purple screens are gone

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Adam Cox @mradamcox.bsky.social · 25d

We were lucky to get you at the beginning of this bowling Renaissance!

Adam Cox @mradamcox.bsky.social · 26d

Perfect! Yes the Springfield georeferencing was done by a user who got in touch out of the blue and got to work on those maps, still not sure who that was!

Adam Cox @mradamcox.bsky.social · 26d

Great! Please don't hesitate to reach out if you need something or find issues with the site. Would love to learn more about this book sometime!

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Adam Cox @mradamcox.bsky.social · 29d

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.

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Adam Cox @mradamcox.bsky.social · Aug 9

This started as a "here's a link to a recent talk recording" but I ended up repurposing some slides and writing more about how the warping process works within the system.

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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Reposted by Adam Cox

Nick Santos @nickrsan.mapstodon.space.ap.brid.gy · Jul 25

Are there any options for running a serverless patterned STAC endpoint? Or even better, a fully static STAC-metadata store that requires the client to do the filtering?

I see that https://github.com/stac-utils/stac-fastapi can use a parquet storage as its backend, which seems like it could get […]

Original post on mapstodon.space

mapstodon.space

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Adam Cox @mradamcox.bsky.social · Jul 14

I'll be doing a nice long talk this Wednesday morning at 11am central time, open to everyone! Sign up through the link.

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

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Reposted by Adam Cox

RJ Andrews @infowetrust.com · Jul 9

1895 Hull-House wage and nationality maps, welcome to your forever home!

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Adam Cox @mradamcox.bsky.social · Jun 22

Chipped away at this over the last couple weeks, 425gb off the server and up in the air. Really throws the door open for future possibilities...

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

Reposted by Adam Cox

pork, cheese, broccoli rabe @garlicbuffalo.gobirds.biz · Jun 21

amtrak’s marketing team gets it

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Reposted by Adam Cox

Healthy Regions + Policies Lab @healthyregions.bsky.social · Jun 18

📣 The Healthy Regions & Policies Lab is looking for a Postdoctoral Scholar for the 2025-26 academic year!

🧑‍🎓 Learn more about position compensation, benefits, and requirements here: healthyregions.org/2025/06/06/p...

📅 Apply by 11:59 PM CDT on Tuesday, July 1st, 2025

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Adam Cox @mradamcox.bsky.social · Jun 15

Glad to hear it and thanks for trying it out! "therapeutic" needs to go on the testimonials page if I ever make one

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Adam Cox @mradamcox.bsky.social · Jun 14

In the meantime checkout this walkthrough that gives an overview of the process: about.oldinsurancemaps.net/walkthroughs..., and you can find other docs/info from there as well. Some of the docs are a bit out of date, but still close enough to get started. Don't hesitate to DM me with questions!

New Iberia, La., 1885 (multi-page Sanborn map) - About OldInsuranceMaps.net

about.oldinsurancemaps.net

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Adam Cox @mradamcox.bsky.social · Jun 14

You bet. I've added the 1887 vol. 1 map here: oldinsurancemaps.net/map/sanborn0.... You can make an account then go to that page and click "Load documents". Just let it run for a bit (I'll check on it too later)

San Francisco, Calif. | 1887 | Vol. 1 | OldInsuranceMaps.net

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

oldinsurancemaps.net

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Adam Cox @mradamcox.bsky.social · Jun 13

We wrote a bit about it here: forum.openhistoricalmap.org/t/street-wid...

Street widths not to scale! More examples?

Thought it would be useful to start a post about this, because its come up a few times recently, and we’ve had a discussion on GitHub about it in the past as well. Please chime in with any thoughts or...

forum.openhistoricalmap.org

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Adam Cox @mradamcox.bsky.social · Jun 13

@ktflghm.bsky.social I'd be happy to add any of these volumes to @oldinsurancemaps.net if you would like to georeference them there! The workflow is straight-forward and you can download any geotiffs or use XYZ/WMS tile layers in whatever software you want. www.loc.gov/collections/...

Sanborn Maps | The Library of Congress

Search results 1 - 25 of 45.

www.loc.gov

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Adam Cox @mradamcox.bsky.social · Jun 13

On @oldinsurancemaps.net oldinsurancemaps.net/san-francisc... you can find hundreds of georeferenced sheets from 1950, done by the team at the University of Richmond's Digital Scholarship lab.

San Francisco, Calif.

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

oldinsurancemaps.net

Adam Cox @mradamcox.bsky.social · Jun 13

Yeah it's a strange thing about the SF Sanborns, all the streets are drawn very wide. For the team working on these, I added a parcel boundary layer (used #pmtiles @protomaps.com !) so they could split each street and georeference each block individually, snapping to parcel lines.

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Adam Cox @mradamcox.bsky.social · Jun 4

Seems to me that our current dependence on GPS is fed by an expectation that we always go the quickest route and know exactly where we are at any moment. If that expectation were muted we would be happier to miss a turn sometimes and ask for directions when needed.

Adam Cox @mradamcox.bsky.social · Jun 4

The six-year Sanborn copyright case has been settled! Started with EDR (now LightBox) suing ERIS and right away ERIS counter-sued with a lot of claims. Looks like ERIS came up big in the settlement with a valid license to distribute all copyrighted Sanborn maps: www.businesswire.com/news/home/20....

ERIS Information Inc. Sees Resolution to Longstanding Lawsuit

EDR and ERIS have announced the resolution of their dispute and lawsuit involving EDR’s claims of copyright infringement and ERIS’s claims of antitrust viola...

www.businesswire.com

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