bcb05f051e
USGS has no colour equirect for Europa/Callisto/Titan/Phobos/Charon, so those
mosaics shipped grayscale. Multiply each by its characteristic hue at render
(bodies.js `tint`; moons.js tint-preserving loader keeps the real surface detail,
adds the iconic colour — Titan orange, Europa/Charon tan, Callisto/Phobos warm).
Io/Ganymede/Triton stay true USGS colour (white multiplier). Flagged in CREDITS as
a directorial (non-data) choice per Part ω.2. User-directed ("colourise the moons").
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
3.8 KiB
Texture credits
2k_* planet, Sun, ring & starfield maps — Solar System Scope (CC BY 4.0)
The 2k_ planet, Moon, Sun, ring and starfield maps in this directory are from
the Solar System Scope texture pack and are used under CC BY 4.0.
- Source: https://www.solarsystemscope.com/textures/
- License: Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
- Attribution: Solar System Scope (INOVE / solarsystemscope.com). Textures are based on NASA elevation and imagery data.
Downloaded 2026-07-16 at 2k resolution:
| File | Body |
|---|---|
| 2k_sun.jpg | Sun |
| 2k_mercury.jpg | Mercury |
| 2k_venus_surface.jpg | Venus (surface) |
| 2k_earth_daymap.jpg | Earth (day) |
| 2k_mars.jpg | Mars |
| 2k_jupiter.jpg | Jupiter |
| 2k_saturn.jpg | Saturn |
| 2k_uranus.jpg | Uranus |
| 2k_neptune.jpg | Neptune |
| 2k_moon.jpg | Moon |
| 2k_saturn_ring_alpha.png | Saturn rings (alpha) |
| 2k_stars_milky_way.jpg | Milky Way skybox panorama |
Attribution also appears in the app's HUD footer, as CC BY requires.
1k_* moon maps — USGS Astrogeology / NASA (public domain)
Added wave 2 (PERIHELION · SELENE). Global equirectangular (simple-cylindrical)
mosaics from the USGS Astrogeology Science Center (planetarymaps.usgs.gov),
built from NASA mission imagery. USGS/NASA-produced planetary data are in the
U.S. public domain (no copyright asserted). Each was downloaded as a GeoTIFF
and downscaled to 1024×512 JPEG with sips (Europa re-encoded at q70 to stay
under budget). Downloaded 2026-07-16.
| File | Body | Mission / instrument | Source (USGS Astrogeology) | License |
|---|---|---|---|---|
| 1k_io.jpg | Io | Galileo SSI + Voyager, color-merge | .../mosaic/Io_Galileo_SSI_Global_Mosaic_ClrMerge_1km.tif |
Public domain |
| 1k_europa.jpg | Europa | Voyager + Galileo SSI, global 500 m | .../mosaic/Europa_Voyager_GalileoSSI_global_mosaic_500m.tif |
Public domain |
| 1k_ganymede.jpg | Ganymede | Voyager + Galileo SSI, global color 1435 m | .../mosaic/Ganymede_Voyager_GalileoSSI_Global_ClrMosaic_1435m.tif |
Public domain |
| 1k_callisto.jpg | Callisto | Voyager + Galileo SSI, global 1 km | .../mosaic/Callisto_Voyager_GalileoSSI_global_mosaic_1km.tif |
Public domain |
| 1k_titan.jpg | Titan | Cassini ISS, global mosaic (PIA19658), 4 km | .../mosaic/Titan_ISS_P19658_Mosaic_Global_4km.tif |
Public domain |
| 1k_triton.jpg | Triton | Voyager 2, global color mosaic (gap-filled) 600 m | .../mosaic/Triton_Voyager2_ClrMosaic_GlobalFill_600m.tif |
Public domain |
| 1k_charon.jpg | Charon | New Horizons LORRI/MVIC, global mosaic 300 m (Jul 2017) | .../mosaic/Charon_NewHorizons_Global_Mosaic_300m_Jul2017_8bit.tif |
Public domain |
| 1k_phobos.jpg | Phobos | Mars Express HRSC-SRC, global mosaic 16 ppd | .../mosaic/Phobos_ME_SRC_Mosaic_Global_16ppd.tif |
Public domain |
Host base URL: https://planetarymaps.usgs.gov/mosaic/ (served from the USGS
asc-pds-services bucket). USGS terms: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits.
Directorial colourisation (PERIHELION closer). USGS has no colour equirect for
Europa, Callisto, Titan, Phobos and Charon, so those mosaics ship grayscale. The
app multiplies each by its characteristic hue at render (bodies.js tint:
Titan orange, Europa/Charon tan, Callisto/Phobos warm-brown) — the real surface
detail is preserved; only the colour is an explicit directorial choice, not data.
Io, Ganymede and Triton are USGS colour mosaics and render untinted.
Truth boundary (brief §7b): these are the real data textures — real worlds
get real maps. The stylized grimoire portraits in ../art/grimoire/ are the
aesthetic layer (generated art), kept visually and directorially separate.