Map Librarian's Toolbox
National Data Sources
Canada
- geodisy
- Research data from around the world produced by Canadian scientists. This is a GeoBlacklight site created by the Canadian Association of Research Libraries & Compute Canada
United States
- National Map Data Download
- Separate from the c. 2022 Map Viewer, this version has a direct route to downloading the underlying source data. Their landing page has a list of alternate routes to data. Of particular interest is the ftp-like Staged Products Directory.
- Census Mapping Files
Relatively direct access to shapefiles, kml, and file geodatabase versions of US Census geographies back to 1990 - National Historic GIS
- IPUMS has created census geographies back to the first census in 1790. Downloads are via their Data Finder
- IPUMS has created census geographies back to the first census in 1790. Downloads are via their Data Finder