alt Hacker NewsThere was/is a website that's a bit like google maps, but with historical map overlays. I cannot for the life of me remember the name.
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test098 • yesterday at 10:14 PM
NYPL Map Warper, unfortunately now defunct: https://wayback.archive-it.org/13216/20210520171637/http://m...
Pastmaps might be what you're thinking of? They have an archive of the maps that the United States Geological Survey used to serve as their Historical Topographic Map Collection.