Per object, not per museum
Image rights
Museums do not hold one licence. They hold thousands of individual rights positions, and a collection API will happily hand you an in-copyright photograph next to a public-domain painting. So rights are evaluated for each object, from the statement its own museum published, and anything unclear is excluded rather than guessed at.
Licences we play
| Identifier | Licence |
|---|---|
cc0 | CC0 1.0 |
pdm | Public Domain Mark 1.0 |
cc-by | CC BY 4.0 |
cc-by-sa | CC BY-SA 4.0 |
Attribution is shown on every reveal, with a link to the object at its museum, which satisfies the attribution terms these licences carry.
Licences we refuse
| Identifier | Why |
|---|---|
cc-by-nc | NonCommercial |
cc-by-nc-nd | NonCommercial + NoDerivatives |
cc-by-nc-sa | NonCommercial |
cc-by-nd | NoDerivatives |
inc | in copyright |
inc-edu | in copyright, educational use only |
ogl | Open Government Licence (not reviewed) |
opl | Open Parliament Licence (not reviewed) |
NonCommercial terms are refused because this product intends to carry advertising eventually, and a licence that would forbid that later forbids it now. NoDerivatives is refused because the game crops and resizes. An unrecognised statement is not a permissive one.
What the last harvest did
| Museum | Considered | Cleared | Excluded, by reason |
|---|---|---|---|
| The Met | 273 | 235 | date range too wide or out of bounds (38) |
| Art Institute of Chicago | 377 | 351 | date range too wide or out of bounds (26) |
| Wellcome Collection | 253 | 252 | no usable date (1) |
| Rijksmuseum | 220 | 196 | no usable date (15); no recognised licence statement (9) |