Public domain topo maps from the USGS
https://www.usgs.gov/core-science-systems/ngp/topo-maps/historical-topographic-map-collection
To regenerate the image files, you'll need imagemagick
Public domain topo maps from the USGS
https://www.usgs.gov/core-science-systems/ngp/topo-maps/historical-topographic-map-collection
To regenerate the image files, you'll need imagemagick
The Unlicense