These files are exported from the https://github.com/hyperknot/country-levels project.
The GeoJSON files are from OpenStreetMap, © OpenStreetMap contributors.
Population information and corrections are from Wikidata, Public Domain Creative Commons CC0 License.
The US County shapes and FIPS codes are from the US Census Bureau.
Brazilian municipality data and IBGE codes are from IBGE - Brazilian Institute of Geography and Statistics.