Country boundaries: Natural Earth, 1:110m Admin 0 countries, public domain.
Source: https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_110m_admin_0_countries.geojson
Terms: https://www.naturalearthdata.com/about/terms-of-use/
Downloaded 2026-11-06. Properties reduced to display name and ISO identifier.
Boundaries are cartographic context, not a statement about political status.

Country geometries and stable IDs are retained; region labels derive from GIM country groups with Natural Earth continent/subregion fallback.

Offline Plotly topology: app/static/world_110m.json, obtained from https://cdn.plot.ly/un/world_110m.json. Plotly uses it for geographic rendering; visible country geometry remains the bundled Natural Earth GeoJSON.

Offline renderer: app/static/plotly-geo.min.js, Plotly.js 4.1.1 geographic distribution, MIT license (copyright and license URL retained in the bundle header). Official source: https://cdn.plot.ly/plotly-geo-4.1.1.min.js