Mapsnap: Automated Georeferencing for Historic Sanborn Insurance Maps

Toggle navigation danvk.org Home Blog Contact Features Catskills Hiking Project Online Boggle Solver Base Pair Colorer Hex ↔ Dec converter in JavaScript NS-Tower in the Browser GW-BASIC program decoder Ancient REALbasic site (1999) Beal's Conjecture 2026.09.10 Introducing mapsnap: Automated Georeferencing for Historic Sanborn Insurance Maps Over 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 inte