User talk:Aristeas

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Tech News: 2024-23

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Hello, Aristeas. I'm curious about how you used cat-a-lot to add images to Category:Featured pictures in the public domain? How did you find the images? According to Petscan, there are still 4812 candidate images that could be in either Category:Featured pictures in the public domain or Category:Featured photographs in the public domain, but I don't know of an easy way to add the images to those categories. — hike395 (talk) 18:22, 12 July 2024 (UTC)[reply]

I figured out how to do it with a combination of PagePile and QuickCategories. — hike395 (talk) 18:32, 12 July 2024 (UTC)[reply]
Hello hike395, please be careful! There are several problems. (CCing @W.carter: because she is interested and involved in this area.)
  • Many of the images yielded by this Petscan search are no valid Featured pictures on Wikimedia Commons, but only on some Wikipedia. I have intentionally not included these images, because the standards for featured pictures on Wikipedias vary widly and some of these pictures featured on some Wikipedia are of very poor quality. The new categories Category:Featured pictures in the public domain and Category:Featured photographs in the public domain are (as most categories about featured pictures) intended only for pictures featured on Wikimedia Commons.
  • Some other images are not featured images at all, e.g. this one, but just loosely related to featured pictures. Such images should not be included in the new categories.
  • Some other images have been “Picture of the day” on Wikimedia Commons, but were just selected by some guys for that and were never featured pictures, e.g. this one. These images are normally of poor quality and should not be included.
  • Many images which are found by simple searches are not public domain, but just contain a PD template for the subject – like this one. This happens when people take a photo of something, want to say that there are no copyright problems for that something and add a PD template, but additionally add a copyright template for their photograph. In this case the photo is naturally not a PD image, and should not be included in the new categories. This is a very severe issues – the photographers would be very angry when we would include their photos in a PD category.
  • And maybe there are more problem. Therefore, as I have learned in the last days, it is very difficult to identify valid featured PD images with searches; in the end one must check every single image before including it. Please do not invalidate the new categories by adding images to hastily.
Best, – Aristeas (talk) 18:44, 12 July 2024 (UTC)[reply]
Thank you for the warning! I have immediately stopped the QuickCategory batch run. I may have caused some problems --- I will go back and check the edits. — hike395 (talk) 18:49, 12 July 2024 (UTC)[reply]
Yep hike395, I can only agree with what Aristeas is writing here. Too many traps open up when you do general searches for FPs. Aristeas is doing a huge job at checking and re-checking all these sometimes complicated licenses that FPs can have. Aristeas is a very skilled coder, but even so much of this needs to be checked manually (Which is mostly what I'm trying to help him with). And images in this category should only be Commons FPs, other wikis and projects have to do their own collections. Best, --Cart (talk) 18:53, 12 July 2024 (UTC)[reply]
I am just reverting all of my batch edits -- they are most likely incorrect. Sorry for the trouble. — hike395 (talk) 19:19, 12 July 2024 (UTC)[reply]
No problem, hike395 – thank you very much for being careful. It’s really a pity that finding valid PD images is so difficult. PetScan is a great tool, but in this case it does too much of a good thing and returns too many false positive matches. There are too many PD templates and far too many related categories (see the countless subcategories of Category:Public domain), and people use PD templates in too many ways (like the totally confusing examples I have cited above in which photographers used a PD template for the subject, but a GFDL and/or CC template for the photograph itself). One would wish for an additional flat PD category which would contain all images which are really plain vanilla PD/CC-Zero/whatever images; then we could combine that category in searches with other criteria and easily find PD images of certain subjects, styles, etc. … But AFAIK such a flat PD category does not exists. Maybe one should propose its creation on the Commons:Village pump page?
FYI: I have collected the images in the two new PD FP categories in three steps. First I have added all FP images which are contained in some rather reliable PD categories – e.g., Category:CC-Zero, and the news agency categories like Category:PD-Highsmith, Category:PD-Gottlieb, etc. Then I have added all images from the old gallery page, removing misc. entries which are no longer featured pictures because they have been delisted. Finally I have searched the list of valid featured pictures with an advanced search:
incategory:"Featured pictures on Wikimedia Commons" insource:/\{\{PD-/ -deepcat:"Featured pictures in the public domain" -insource:/cc-by|GFDL/i
This search gets all valid FPs, selects the ones which contain some {{PD-...}} template, removes the ones which are already included in the new PD FP categories, and excludes the ones which contain an additional CC-BY or GFDL template. This search is not perfect, too, but it yielded only a few false positives. Therefore for such complicated matters an advanced search is suited better than the easy, but too greedy PetScan search. Hope it helps, – Aristeas (talk) 13:15, 13 July 2024 (UTC)[reply]