Earth at Night / Black Marble 2016 (3600 × 1800): NASA Earth Observatory.
Country detail tiles are cropped from the 13500 × 6750 global map and
resized to at most 1024 × 1024; coordinates and colours are preserved.
https://science.nasa.gov/earth/earth-observatory/earth-at-night/maps/
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data
from Miguel Roman, NASA Goddard Space Flight Center.
https://www.nasa.gov/nasa-brand-center/images-and-media/

Surface imagery: NASA Blue Marble (2002), Reto Stöckli / Robert Simmon.
https://science.nasa.gov/earth/earth-observatory/the-blue-marble-true-color-global-imagery-at-1km-resolution/

Country borders: Natural Earth 1:50m Admin 0 Countries, version 5.1.1.
Public domain. Simplified and rounded for this interactive overview map.
https://www.naturalearthdata.com/downloads/50m-cultural-vectors/50m-admin-0-countries-2/
https://www.naturalearthdata.com/about/terms-of-use/

City coordinates and alternate city names: GeoNames cities15000.
Creative Commons Attribution 4.0 (CC BY 4.0).
https://www.geonames.org/
https://download.geonames.org/export/dump/readme.txt
https://creativecommons.org/licenses/by/4.0/
Adapted into an offline lookup of normalized names and coordinates.
Ambiguous names are omitted from the map. No external geocoding requests are made.

Reference data is approximate; the map is for discovering public profiles.
Rebuild data with scripts/build-rating-atlas.py and the source archives.
Then run node scripts/build-rating-night-tiles.mjs with the 3 km NASA JPEG.
Geographic reference data was prepared on 2026-10-18.