kottke.org on Mythryl: “Mapsnap is a program designed to take old Sanborn insurance maps…”

Mapsnap is a program designed to take old Sanborn insurance maps (block-by-block maps of every US city from 1870-1960) and aligning them with modern maps. [danvk.org]

danvk.orgIntroducing mapsnap: Automated Georeferencing for Historic Sanborn Insurance MapsOver the past few months I’ve been working on mapsnap, a program to automatically georeference old insurance maps. This post explains why these maps are interesting, how mapsnap works, and why this is worth doing.

6/10/26, 2:00 pm7 reposts27 likes

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