Natural Earth boundaries: the offline fallback of apps/projects/boundaries.py

Files
  ne_10m_admin_0_countries.geojson.gz          258 countries: Natural Earth 1:10m Cultural Vectors,
                                               Admin 0 - Countries, version 5.1.1
  ne_10m_admin_1_states_provinces.geojson.gz   4,596 states and provinces: Natural Earth 1:10m Cultural Vectors,
                                               Admin 1 - States, Provinces, version 5.1.1

Source
  https://www.naturalearthdata.com/
  downloaded from https://naciscdn.org/naturalearth/10m/cultural/ (ne_10m_admin_0_countries.zip and
  ne_10m_admin_1_states_provinces.zip)

License: public domain
  "All versions of Natural Earth raster + vector map data found on this website are in the public domain. You may use
  the maps in any manner, including modifying the content and design, electronic dissemination, and offset printing."
  (https://www.naturalearthdata.com/about/terms-of-use/)
  No permission is needed and no credit is required; every dataset made from these files still carries the credit
  "Made with Natural Earth" in its source and profile.

Changes made for this copy
  - geometry simplified with a 0.02 degree tolerance (about 2 km), topology preserved per feature, then rounded to 3
    decimals (about 110 m); every feature stays valid
  - properties trimmed: countries keep name, iso_a3, iso_a2, pop_est and pop_year (Natural Earth's population
    estimate and its year); states and provinces keep name, iso_3166_2, country, iso_a3 and type
  - a bbox on every feature, for a fast area test

Natural Earth shows de facto boundaries at a small scale. It is not an authority on any boundary, it has no districts
(ADM2), and its population figures are estimates. Districts come from geoBoundaries or the GeoBit Atlas.