Earth cartography

earth.jpg is an offline 3600 × 1800 equirectangular map. The North Pole is at the top. Its central meridian is Greenwich. It combines shaded terrain, bathymetry, muted country boundaries and historical night-light observations.

Natural Earth — 1:50m Gray Earth with Shaded Relief, Hypsography, and Ocean Bottom, 1:50m Shaded Relief, and 1:50m Admin 0 Countries. Natural Earth places its vector and raster data in the public domain.
https://www.naturalearthdata.com/downloads/50m-raster-data/50m-gray-earth/
https://www.naturalearthdata.com/downloads/50m-raster-data/50m-shaded-relief/
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_50m_admin_0_countries.geojson
https://www.naturalearthdata.com/about/terms-of-use/

Night lights — NASA Earth Observatory, Black Marble, 2016 grayscale global composite using Suomi NPP VIIRS data. Used as recolored historical cartographic imagery. NASA media usage guidelines apply.
https://science.nasa.gov/earth/earth-observatory/earth-at-night/maps/
https://www.nasa.gov/nasa-brand-center/images-and-media/

Color, contrast and compositing were adapted for this prototype.

Regional vector map

world-detail.js uses a lowercase "countries", "land", "lakes" and "rivers" TopoJSON GeometryCollection. Country and coastline arcs come from world-atlas 2.0.2, Natural Earth 1:10m. The source's integer grid and shared arcs are preserved, with a maximum 0.007° line simplification tolerance. Lake shapes and major rivers use the Natural Earth 1:10m datasets, quantized on the same grid. Country label positions come from Natural Earth at 1:50m. Shapes use generalized cartographic boundaries and historical geographic data.
https://github.com/topojson/world-atlas
https://cdn.jsdelivr.net/npm/world-atlas@2.0.2/countries-10m.json
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_lakes.geojson
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_rivers_lake_centerlines.geojson
https://www.naturalearthdata.com/about/terms-of-use/

The world-atlas ISC copyright and permission notice is embedded in world-detail.js.