Download the Data
The scans of maps and area descriptions are in the public domain. They are all from City Survey Files, 1935-1940 at the National Archives with two exceptions. The San Antonio map is from the University of Texas, San Antonio Special Collections and the Portland, Maine, map from Bowdoin College. The georectified rasters and spatial data are available under a CC-BY-NC license.
The collective spatial data, including area descriptions transcriptions, is available in two formats:
On GitHub we have more data and metadata, including:
We also recommend Helen C.S. Meier and Bruce C. Mitchell's dataset "Historic Redlining Indicator for 2010 and 2020 US Census Tracts. It also crosswalks HOLC areas to 2010 and 2020 census tracts. Additionally, it includes continuous and equal interval scoring.
If you are interested in a particular city and want its spatial data, images of its map (original and georectified), or images of its area descriptions, please use the following.