Mapping the turn of the Century with OHM and oldinsurancemaps.net

on YouTube ↗12m

" summary

oldinsurancemaps.net turns the Library of Congress Sanborn scans into ready-to-use web tiles and a single mosaic endpoint that import into OpenHistoricalMap editors like iD with one click, using in-browser georeferencing and a live preview after three control points. the site trims overlapping pages into stitched mosaics, serves XYZ tiles and endpoint URLs, handles tens of thousands of pages (about 35,000 volumes cited), and works on mobile so tracing and time-enabled mapping proceed immediately.

AI-written summary · about

" chapters (12)

1. 0:00Introduction
2. 0:35Project Overview
3. 1:22Sanborn Fire Trans Maps
4. 3:00OHM Workflow
5. 4:04Preparation Step
6. 4:34Video Referencing
7. 6:01Volume Level Trimming
8. 6:58Open Historical Map
9. 7:58Old Insurance Maps
10. 8:09Open Old Insurance Maps
11. 8:39Login to Old Insurance Maps
12. 9:08Wrap up

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