Observed arrival · 2026-09-19

Dig Maps — a private old-map georeferencer

digmaps.app Visit website

Editorial interest 84/100 Selection signal · not a rating of the site

A browser tool for aligning scanned historical maps with the modern world.

Landing page captured for the 2026-09-19 issue.

For: Historic-map researchers and property-history explorers
Worth noticing: Browser-based GDAL WebAssembly exports include GeoTIFF, MBTiles, and coordinate points.

Field notes

Dig Maps uses paired control points to fit a scanned map to a modern map, with Helmert, affine, and thin-plate-spline options exposed in the interface. Its layer picker includes aerial imagery, LiDAR hillshade, county maps, historic aerials, and USGS topo quads. The page also presents local export paths: JSON for the project, GeoTIFF for GIS software, MBTiles for offline phone use, and GDAL points.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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