Record · corpus.blog/posts/01a08d2e-a41d-735e-81c7-84304b0d3567

Introducing mapsnap: Automated Georeferencing for Historic Sanborn Insurance Maps

danvk.org · published 10 September 2026

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https://github.com/danvk/mapsnap

github.com

https://en.wikipedia.org/wiki/Sanborn_maps

en.wikipedia.org

https://www.loc.gov/collections/sanborn-maps/about-this-collection/

loc.gov

https://www.youtube.com/watch?v=LnCZ-flnT1E

youtube.com

https://www.oldsf.org/

oldsf.org

https://www.oldnyc.org/

oldnyc.org

https://en.wikipedia.org/wiki/Alfred_E._Smith_Houses

en.wikipedia.org

https://www.nypl.org/node/577512

nypl.org

https://www.loc.gov/collections/sanborn-maps/

loc.gov

https://oldinsurancemaps.net/

oldinsurancemaps.net

https://oldinsurancemaps.net/map/sanborn05939_001

oldinsurancemaps.net

https://oldinsurancemaps.net/map/sanborn06113_004

oldinsurancemaps.net

https://oldinsurancemaps.net/map/sanborn05791_053

oldinsurancemaps.net

https://github.com/danvk/mapsnap/commits/main/

github.com

https://github.com/JaidedAI/EasyOCR

github.com

https://github.com/danvk/mapsnap/pull/77

github.com

https://github.com/danvk/mapsnap/pull/18

github.com

https://github.com/danvk/mapsnap/pull/279

github.com

Testing the waters with 2 GCP georeferencing (Helmert!) Read at the source ↗

blog.oldinsurancemaps.net

https://github.com/danvk/mapsnap/issues/6

github.com

https://www.thinkautonomous.ai/blog/ransac-algorithm/

thinkautonomous.ai

https://github.com/danvk/mapsnap/blob/main/docs/HOW-IT-WORKS.md

github.com