I'm looking for historical shapefiles of city boundaries in the United States, for the time period 1920 - 1950. I know these won't be available for every city, especially small ones, but I'd like as many as I can.
Other questions, like this one deal with MSAs and CBSAs, which I don't think existed at the time. If all else fails, I can use those.
Other resources like the National Historical Geographic Information System (NHGIS), Duke, and the Newberry Library don't seem to have these either.
census "city boundaries" 1920(as quoted) in books.google.com, you may find some maps you could convert from printed form to shapefiles. I only found county boundaries, but I didn't dig very deep. – Sep 12 '18 at 19:07