At the IRC hour on Structured Data for Commons tonight, (log: https://tools.wmflabs.org/meetbot/wikimedia-office/2014/ wikimedia-office.2014-09-03-18.00.log.html ) Susanna gave the link to the impressive Wikimaps metadata spreadsheet, https://docs.google.com/spreadsheets/d/1Hn8VQ1rBgXj3avkUktjychEhluLQQ Jl5v6WRlI0LJho/edit#gid=0 but this made me wonder: is every single map notable, in the sense of meriting its own Wikidata Q-number ? For example, consider https://commons.wikimedia.org/wiki/Category:England_ Delineated_%281800%29_by_John_Aikin a set of fairly simple sketch maps of English counties, published in a schoolbook in 1790. Should each map individually have a Q-number ? Or instead, should just the book and the edition have Q-numbers ? The question is similar to that of books of engravings, such as eg https://commons.wikimedia.org/wiki/Category:Views_of_the_ Seats_of_Noblemen_and_Gentlemen_in_England,_Wales,_ Scotland_and_Ireland_%281818%29 Should each engraving have an individual Q-number ? Or instead, just the book and the edition, with details specific to the individual engraving (of which we may have more than one scan) kept on the CommonsData page for the file ? For maps there is some clear per-map metadata, even when they are part of a set -- for example location, bounding boxes, etc. Is it right to assume that there will always be a WikiData item for this to live in? Or in some cases, would it have to live on CommonsData? And will a copy of it need to live on CommonsData anyway, to facilitate rapid sorting / filtering of a collection of images ? Have there been any discussions that we know of in the Wikidata community about this? -- James.