be5f8ad544
- source 8 public-domain equirectangular mosaics (io/europa/ganymede/callisto/ titan/triton/charon/phobos) from usgs astrogeology, downscale to 1024x512 jpg (0.92 mb added total, each <=143 kb); credits.md lists source/mission/license - bodies.js: texture field on the 8 sourced moon entries only - moons.js: load textures via ctx.loadTextureInto (same path as planets.js, so the moon's own 2k map also renders now); flat-color 404 fallback preserved - moons.js tick: tidal lock rotation.y = 2pi*(jd-J2000)/period + pi (signed period gives retrograde spin for free)
59 lines
3.3 KiB
Markdown
59 lines
3.3 KiB
Markdown
# Texture credits
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## `2k_*` planet, Sun, ring & starfield maps — Solar System Scope (CC BY 4.0)
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The **`2k_`** planet, Moon, Sun, ring and starfield maps in this directory are from
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the **Solar System Scope** texture pack and are used under **CC BY 4.0**.
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- Source: https://www.solarsystemscope.com/textures/
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- License: Creative Commons Attribution 4.0 International (CC BY 4.0)
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https://creativecommons.org/licenses/by/4.0/
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- Attribution: *Solar System Scope* (INOVE / solarsystemscope.com). Textures are
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based on NASA elevation and imagery data.
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Downloaded 2026-07-16 at 2k resolution:
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| File | Body |
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|------|------|
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| 2k_sun.jpg | Sun |
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| 2k_mercury.jpg | Mercury |
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| 2k_venus_surface.jpg | Venus (surface) |
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| 2k_earth_daymap.jpg | Earth (day) |
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| 2k_mars.jpg | Mars |
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| 2k_jupiter.jpg | Jupiter |
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| 2k_saturn.jpg | Saturn |
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| 2k_uranus.jpg | Uranus |
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| 2k_neptune.jpg | Neptune |
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| 2k_moon.jpg | Moon |
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| 2k_saturn_ring_alpha.png | Saturn rings (alpha) |
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| 2k_stars_milky_way.jpg | Milky Way skybox panorama |
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Attribution also appears in the app's HUD footer, as CC BY requires.
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## `1k_*` moon maps — USGS Astrogeology / NASA (public domain)
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Added wave 2 (PERIHELION · SELENE). Global equirectangular (simple-cylindrical)
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mosaics from the **USGS Astrogeology Science Center** (`planetarymaps.usgs.gov`),
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built from NASA mission imagery. USGS/NASA-produced planetary data are in the
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**U.S. public domain** (no copyright asserted). Each was downloaded as a GeoTIFF
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and downscaled to 1024×512 JPEG with `sips` (Europa re-encoded at q70 to stay
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under budget). Downloaded 2026-07-16.
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| File | Body | Mission / instrument | Source (USGS Astrogeology) | License |
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|------|------|----------------------|----------------------------|---------|
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| 1k_io.jpg | Io | Galileo SSI + Voyager, color-merge | `.../mosaic/Io_Galileo_SSI_Global_Mosaic_ClrMerge_1km.tif` | Public domain |
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| 1k_europa.jpg | Europa | Voyager + Galileo SSI, global 500 m | `.../mosaic/Europa_Voyager_GalileoSSI_global_mosaic_500m.tif` | Public domain |
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| 1k_ganymede.jpg | Ganymede | Voyager + Galileo SSI, global color 1435 m | `.../mosaic/Ganymede_Voyager_GalileoSSI_Global_ClrMosaic_1435m.tif` | Public domain |
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| 1k_callisto.jpg | Callisto | Voyager + Galileo SSI, global 1 km | `.../mosaic/Callisto_Voyager_GalileoSSI_global_mosaic_1km.tif` | Public domain |
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| 1k_titan.jpg | Titan | Cassini ISS, global mosaic (PIA19658), 4 km | `.../mosaic/Titan_ISS_P19658_Mosaic_Global_4km.tif` | Public domain |
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| 1k_triton.jpg | Triton | Voyager 2, global color mosaic (gap-filled) 600 m | `.../mosaic/Triton_Voyager2_ClrMosaic_GlobalFill_600m.tif` | Public domain |
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| 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 |
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| 1k_phobos.jpg | Phobos | Mars Express HRSC-SRC, global mosaic 16 ppd | `.../mosaic/Phobos_ME_SRC_Mosaic_Global_16ppd.tif` | Public domain |
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Host base URL: `https://planetarymaps.usgs.gov/mosaic/` (served from the USGS
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`asc-pds-services` bucket). USGS terms: <https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits>.
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**Truth boundary (brief §7b):** these are the *real data* textures — real worlds
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get real maps. The stylized grimoire portraits in `../art/grimoire/` are the
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*aesthetic* layer (generated art), kept visually and directorially separate.
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