Lunar terrain and imagery attribution
NASA Scientific Visualization Studio / LRO LOLA and LROC
Source: https://svs.gsfc.nasa.gov/4720/
Elevation: ldem_16_uint.tif, 5760 x 2880, 16 samples/degree.
Unsigned values in half-meters with a 10,000 m offset relative to radius 1,737,400 m.
lola16.bin preserves the source raster's samples as little-endian unsigned 16-bit integers.
Surface color: lroc_color_poles_4k.tif, converted to JPEG for browser rendering.
Credit: NASA's Scientific Visualization Studio. Visualization by Ernie Wright (USRA).
The color map is optimized for visualization and includes lower-resolution polar albedo.
No invented craters or random displacement are added to the elevation geometry.
Resource estimates are game values, unrelated to the elevation raster.

Earth surface and cloud imagery via Three.js examples (MIT; see ../vendor/THREE-LICENSE.txt):
https://github.com/mrdoob/three.js/tree/dev/examples/textures/planets
https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/textures/planets/earth_atmos_2048.jpg
https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/textures/planets/earth_clouds_1024.png
Earth uses a 6,371 km radius and fixed 384,400 km center distance along the mean sub-Earth direction.
Sun direction matches the lunar scene. Earth rotates once per 24 simulated hours.
Position, axial orientation, atmosphere and static cloud cover are illustrative; no dated ephemeris, libration or live weather.

Lunar display mapping: albedo coordinates are reconstructed per fragment from Moon-fixed
surface direction on the globe, regional patch and detailed ridge mesh. Wrapped texture
gradients avoid a false mipmap seam at +/-180 degrees. This removes pole-crossing UV
triangle smearing without changing elevation data. Polar imagery retains its source
resolution; this processing does not invent higher-resolution surface detail.