# Content License & Media Rights

The code in this repository is covered by [`LICENSE`](./LICENSE) (CC0 1.0),
inherited from the Tampa and Iran War templates. This file covers the
**content**: the compiled data in `js/data.js`, the research notes in
`research/`, and the third-party media the site displays.

## Compiled data

- The compiled dataset (`window.indigoData` in `js/data.js`) and the research
  notes in `research/*.json` are released under
  [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
- Individual figures are facts drawn from the sources cited on each data
  point. Every point carries a `source` object with `institution`, `title`,
  `date`, `url`, usually the supporting `quote`, a `verificationStatus`
  (`CONFIRMED` · `PENDING` · `DERIVED`) and an `accessType`
  (`FREE` · `REGISTRATION` · `PAYWALL` · `API`).
- Quotations from sources are short extracts kept as evidence for the figure
  they support; their copyright stays with their authors and publishers.
- Values marked `estimate: true` or `DERIVED` are conversions, indices,
  remainders or editorial reconstructions; the `note` names the inputs. Do not
  cite them as primary figures.
- Suggested attribution: *Indigo: The Blue That Dyed the World*
  (`fritzhand/history-of-indigo`), compiled from the sources cited per point.

## Media policy

1. **Embed only rights-cleared images.** An image is shown only if its record
   states public domain (or the Public Domain Mark), CC0, CC BY or CC BY-SA.
   The exact rights statement read on the record is kept as `rightsEvidence`
   in `research/media.json`.
2. **Link out for everything else.** Items whose reuse terms are unclear or
   restrictive (NC, ND, "all rights reserved", or a record that could not be
   read) are not embedded. Candidates rejected on these grounds are listed in
   the notes of `research/media.json`.
3. **Credit every image.** Each `mediaAssets` entry records its `license`,
   `creditLine`, the `sourceUrl` of its record and, where it was digitised
   from an archive, `upstreamArchive` and `upstreamUrl`. The credit line and
   license are printed on every card and figure.
4. **Mirrored thumbnails.** Display copies are mirrored in `assets/media/`,
   resized to at most 960 px wide and re-encoded as JPEG, so the page does not
   depend on hotlinking (Wikimedia rate-limits bursts). Each opens the
   full-size original at its source. Public-domain and CC0 files carry no
   conditions; the CC BY and CC BY-SA copies are shown with author and license
   named, and the resized copies are offered under the same license as their
   originals.
5. **Placement by subject.** An image sits in the era it depicts or documents,
   which is not always the era it was made: a modern photograph of a dye
   plant sits with the ancient plant it shows.

Rights concerns: open an issue on the repository and the item will be removed
or replaced with a link-out while it is reviewed.

## The site's own assets

Everything else in `assets/` is original work for this project, released
under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) alongside the
data, with one exception noted below.

| File | What it is |
|---|---|
| `og-image.png` | The 1200×630 share card: type, rules, the dip ramp and the era palette. No photography. |
| `favicon.svg`, `favicon-32.png`, `apple-touch-icon.png` | The Open Material Archive mark — a cloth dipped five times, and the leaf. |
| `jeremy.jpg` | Author portrait, published with the subject's permission. Not CC BY; all rights reserved. |

## Basemap and libraries

- Map tiles: Esri World Dark Gray Canvas (dark theme) and World Light Gray
  Canvas (light theme) — © Esri, HERE, Garmin, © OpenStreetMap contributors,
  used under Esri's basemap terms with attribution displayed on the map.
- Libraries: Leaflet (BSD-2), Chart.js (MIT), loaded from public CDNs.
- Fonts: Crimson Pro and Work Sans (SIL Open Font License) via Google Fonts.

## Media roll

Generated by `node tools/media-roll.mjs`.

| # | Title | Year | Era | License | Credit | Record |
|---|---|---|---|---|---|---|
| 1 | Blue kerchief from Tutankhamun's embalming cache | c. 1328–1318 BCE | origins | CC0 | The Metropolitan Museum of Art, Gift of Theodore M. Davis, 1909 (CC0) | [record](https://www.metmuseum.org/art/collection/search/548833) |
| 2 | Band with vine scroll | 4th–6th century CE | origins | CC0 | The Metropolitan Museum of Art, Gift of George F. Baker, 1890 (CC0) | [record](https://www.metmuseum.org/art/collection/search/444073) |
| 3 | True indigo (Indigofera tinctoria) in flower | 2018 (photograph) | origins | CC BY-SA 4.0 | Yercaud-elango / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Indigofera_tinctoria-1-papanasam-tirunelveli-India.jpg) |
| 4 | Woad (Isatis tinctoria) in flower | 2011 (photograph) | origins | CC BY-SA 3.0 | Alupus / Wikimedia Commons (CC BY-SA 3.0) | [record](https://commons.wikimedia.org/wiki/File:Isatis_tinctoria_habitus.jpg) |
| 5 | Japanese indigo (Persicaria tinctoria) | 2024 (photograph) | origins | CC BY-SA 4.0 | 小石川人晃 / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Stems_and_leaves_of_the_indigo_plant_%28Mito_Botanical_Garden%29_01.jpg) |
| 6 | Assam indigo (Strobilanthes cusia) in flower | 2022 (photograph) | origins | CC BY-SA 4.0 | 7weaves / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Assam_Indigo_%2CStrobilanthes_cusia.jpg) |
| 7 | Anil or wild indigo (Indigofera suffruticosa) | 2016 (photograph) | origins | CC BY-SA 2.0 | Bernard Dupont / Wikimedia Commons (CC BY-SA 2.0) | [record](https://commons.wikimedia.org/wiki/File:Indigobush_%28Indigofera_suffruticosa%29_flowers_%2828801766330%29.jpg) |
| 8 | Curtain fragment with galloping horse | 500s CE | medieval | CC0 | Cleveland Museum of Art, Purchase from the J. H. Wade Fund (CC0) | [record](https://clevelandart.org/art/1948.27) |
| 9 | Nigatsudō Burned Sutra | c. 744 | medieval | CC0 | The Metropolitan Museum of Art, Purchase, Mrs. Jackson Burke Gift, 1978 (CC0) | [record](https://www.metmuseum.org/art/collection/search/44909) |
| 10 | Crocodile whistle and rattle with Maya blue | 700–800 CE | medieval | CC0 | The Metropolitan Museum of Art, The Michael C. Rockefeller Memorial Collection, Bequest of Nelson A. Rockefeller, 1979 (CC0) | [record](https://www.metmuseum.org/art/collection/search/313335) |
| 11 | Bonampak murals, Room 1 | c. 790 CE (murals); 2015 (photograph) | medieval | CC BY 2.0 | Rafael Saldaña / Wikimedia Commons (CC BY 2.0) | [record](https://commons.wikimedia.org/wiki/File:Mural_room_1_bonampak.jpg) |
| 12 | Dyers at work, Des Proprietez des Choses | 1482 | medieval | CC0 | British Library, Royal MS 15 E III, f. 269 / Wikimedia Commons (CC0) | [record](https://commons.wikimedia.org/wiki/File:Dyers_soaking_red_cloth_in_a_heated_barrel_-_Des_Proprietez_des_Choses_%28Volume_II%29_%281482%29%2C_f.269_-_BL_Royal_MS_15_E_III.jpg) |
| 13 | Woad leaves, cocagnes and pigment | 2022 (photograph) | medieval | CC BY-SA 4.0 | Frédéric Neupont / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Pastel_pigment_cocagnes_et_feuilles_-_Mus%C3%A9um_du_pastel.jpg) |
| 14 | The Unicorn Defends Himself (Unicorn Tapestries) | 1495–1505 | searoutes | CC0 | The Metropolitan Museum of Art, Gift of John D. Rockefeller Jr., 1937 (CC0) | [record](https://www.metmuseum.org/art/collection/search/467640) |
| 15 | Stamp-resist-dyed cotton, probably Ahmadabad | probably 15th–16th century | searoutes | CC0 | The Metropolitan Museum of Art, Gift of Nelly, Violet and Elie Abemayor, in memory of Michel Abemayor, 1978 (CC0) | [record](https://www.metmuseum.org/art/collection/search/452913) |
| 16 | Arrival of the Europeans (namban screen) | first quarter 17th century | searoutes | CC0 | The Metropolitan Museum of Art, Mary Griggs Burke Collection, Gift of the Mary and Jackson Burke Foundation, 2015 (CC0) | [record](https://www.metmuseum.org/art/collection/search/65417) |
| 17 | Hôtel d'Assézat, Toulouse | 1555–1557 (building); 2014 (photograph) | searoutes | CC BY-SA 3.0 | PierreSelim / Wikimedia Commons (CC BY-SA 3.0) | [record](https://commons.wikimedia.org/wiki/File:H%C3%B4tel_d%27Ass%C3%A9zat_-_Main_courtyard_-_2014-09-01.jpg) |
| 18 | An indigo works in the French Antilles | 1683 (after c. 1667–71) | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/zn94ca96) |
| 19 | Indigo plant (Indigofera tinctoria) | c. 1750–53 | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/w8h22sfg) |
| 20 | Woad (Isatis tinctoria), coloured etching | 1770s | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/mgxh3v2a) |
| 21 | Dyer’s indigo vat and utensils | c. 1751–1767 | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/yaa9zgh9) |
| 22 | Plate from L'art de l'indigotier | 1770 | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/gg9f6c64) |
| 23 | The Indigo Manufactory (India) | 1778 | plantation | Public domain | Wellcome Collection (Public Domain Mark) | [record](https://wellcomecollection.org/works/ceedzr6z) |
| 24 | Cartouche of Faden’s map of South Carolina and Georgia | 1780 | plantation | Public domain | U.S. National Archives / Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Cartouche_of_a_map_of_South_Carolina_and_Georgia_by_William_Faden.jpg) |
| 25 | Bed hanging, blue-resist textile | c. 1725–75 | plantation | CC0 | The Metropolitan Museum of Art, Gift of Mrs. Reginald P. Rose and Franklin Benkard, 1954 (CC0) | [record](https://www.metmuseum.org/art/collection/search/13561) |
| 26 | Loom width with stylized leaf design | 1790 | empire | CC0 | Cleveland Museum of Art, Gift of Gertrude Underhill (CC0) | [record](https://clevelandart.org/art/1935.113) |
| 27 | Dye House at Konya-chō, Kanda | 1857 | empire | CC0 | Utagawa Hiroshige / The Metropolitan Museum of Art, The Howard Mansfield Collection, Purchase, Rogers Fund, 1936 (CC0) | [record](https://www.metmuseum.org/art/collection/search/56692) |
| 28 | Nil Darpan, or The Indigo Planting Mirror | 1861 | empire | Public domain | Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Nil_Darpan_or_The_Indigo_Planting_Mirror_%28First_Edition%2C_1861%29.pdf) |
| 29 | Indigo factory, Bengal | 1867 | empire | Public domain | William Simpson / British Library via Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Indigo-factory_Bengal4.jpg) |
| 30 | An Indigo Factory, Allahabad | 1865–68 (published 1869–70) | empire | CC0 | Louis Rousselet / Cleveland Museum of Art, Alma Kroeger Fund (CC0) | [record](https://clevelandart.org/art/2022.58.31) |
| 31 | Indigo factory: beating the vats | 1877 | empire | Public domain | Oscar Mallitte / Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:08-Indigo-factory-%28beating-the-Vats%29-bw.jpg) |
| 32 | Sashiko jacket | second half of the 19th century | empire | CC0 | The Metropolitan Museum of Art, Seymour Fund, 1967 (CC0) | [record](https://www.metmuseum.org/art/collection/search/50805) |
| 33 | Prestige robe (riga) | late 1800s–by 1910 | empire | CC0 | Cleveland Museum of Art, Alma Kroeger Fund (CC0) | [record](https://clevelandart.org/art/2013.6) |
| 34 | BASF works at Ludwigshafen | 1881 | synthetic | Public domain | Robert Stieler / BASF archive via Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:BASF_Werk_Ludwigshafen_1881.JPG) |
| 35 | Adolf von Baeyer | 1905–06 (published) | synthetic | Public domain | Popular Science Monthly vol. 68 / Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:PSM_V68_D291_Adolf_von_Baeyer.png) |
| 36 | Structure of indigo (indigotin) | 1883 (structure); 2008 (drawing) | synthetic | Public domain | Yikrazuul / Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Indigo_skeletal.svg) |
| 37 | BASF dye label with indigo dye workers | c. 1900 | synthetic | Public domain | Science History Institute via Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Badische_Anilin_%26_Soda-Fabrik_dye_label_with_indigo_dye_workers_-_DPLA_-_2d34fc4f7ca40e3538008f8b8eee5971.jpg) |
| 38 | M. K. Gandhi, 1917 | 1917 | synthetic | Public domain | Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:MGandhi_%281917%29_01_frontispiece_Mahatma_Gandhi.png) |
| 39 | Woman's shawl or head covering | 1900–1925 | synthetic | CC0 | Cleveland Museum of Art, Alma Kroeger Fund (CC0) | [record](https://clevelandart.org/art/2024.73) |
| 40 | Adire eleko panel with George V and Queen Mary | c. 1910–36 (cloth); 2024 (photograph) | synthetic | CC BY-SA 2.0 | Michael Garlick / Geograph via Wikimedia Commons (CC BY-SA 2.0) | [record](https://commons.wikimedia.org/wiki/File:Ightenhill%2C_Gawthorpe_Hall_Exhibition_Rooms%2C_%27Indigo_Blue%27%2C_panel_of_adire_eleko_of_George_V_and_Queen_Mary_-_geograph.org.uk_-_7890477.jpg) |
| 41 | Patent drawing: Fastening Pocket-Openings (US 139,121) | 1873 | denim | Public domain | U.S. National Archives / Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:Patent_Drawing_for_J._W._Davis%27_Fastening_Pocket_Openings_-_NARA_-_5928292.jpg) |
| 42 | Hitchhiker with his dog on U.S. 66 | 1972 | denim | Public domain | Charles O'Rear / U.S. National Archives (DOCUMERICA) via Wikimedia Commons (Public domain) | [record](https://commons.wikimedia.org/wiki/File:HITCHHIKER_WITH_HIS_DOG%2C_%22TRIPPER%22%2C_ON_U.S._66._U.S._66_CROSSES_THE_COLORADO_RIVER_AT_TOPOCK_-_NARA_-_549112.jpg) |
| 43 | A Yoruba woman at an indigo dye pot | 1977 | denim | CC BY-SA 3.0 | H. W. van Rinsum / Wereldmuseum (Tropenmuseum) via Wikimedia Commons (CC BY-SA 3.0) | [record](https://commons.wikimedia.org/wiki/File:COLLECTIE_TROPENMUSEUM_Een_Yoruba_vrouw_bij_een_indigo_verfpot_TMnr_20016934.jpg) |
| 44 | Market in Agadez, Niger | 1985 | denim | CC BY-SA 4.0 | A. A. van Achterberg / African Studies Centre Leiden via Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:ASC_Leiden_-_van_Achterberg_Collection_-_01_-_21_-_Un_march%C3%A9_avec_un_hangar_avec_un_toit_en_t%C3%B4le_ondul%C3%A9e._Publicit%C3%A9_pour_Gauloises._Les_hommes_touaregs_-_Agadez%2C_Niger%2C_f%C3%A9vrier_1985.tif) |
| 45 | Dyeing at the Kofar Mata dye pits, Kano | 2024 | revival | CC BY-SA 4.0 | Shots by abdul / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Kofar_mata_dye_pit_3.jpg) |
| 46 | Tuareg man in an indigo turban, Hoggar | 2004 | revival | CC BY-SA 3.0 | Garrondo / Wikimedia Commons (CC BY-SA 3.0) | [record](https://commons.wikimedia.org/wiki/File:Tuareg2.JPG) |
| 47 | Fermenting indigo, Zhaoxing, Guizhou | 2007 | revival | CC BY 3.0 | gitane / Wikimedia Commons (CC BY 3.0) | [record](https://commons.wikimedia.org/wiki/File:Indigo-guizhou.jpg) |
| 48 | Indigo vat, Blaudruckerei Wagner | 2023 | revival | CC BY-SA 4.0 | Geolina163 / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Blaudruckerei_Wagner_Indigok%C3%BCpe.jpg) |
| 49 | Matsubara Nobuo at the indigo vat | 2024 | revival | CC BY-SA 4.0 | Markmcnbowe97 / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Matsubara_Nobuo_submerges_fabric_into_the_indigo_vat.jpg) |
| 50 | Worn indigo selvedge denim | 2018 | revival | CC BY-SA 4.0 | Coldwrld / Wikimedia Commons (CC BY-SA 4.0) | [record](https://commons.wikimedia.org/wiki/File:Full_Count_Denim_Fade.jpg) |