commons

Wikimedia Commons Depicts statements over time

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Wikimedia Commons now uses Structured Data on Commons (SDC) to make media information multilingual and machine-readable. A core part of SDC is the ‘depicts’ statement (P180), which identifies items clearly visible in a file. Depicts statements are crucial for MediaSearch, enabling it to find relevant results in any language by using Wikidata labels, as well as having pre precise definition and structure than the existing category structures.

SDC functionalities began to roll out in 2019. Multilingual file captions were introduced early that year, enabling broader accessibility, followed by the ability to add depicts statements directly on file pages and through the UploadWizard.

Although there are numbers floating around showing a general increase in usage of structured data on Commons, there didn’t seem to be any concrete numbers around the growth in use of depicts statements.

I was particularly interested in this, as must tool WikiCrowd is steadily becoming a more and more efficient way of adding these statements en masse. So I decided to see what data I could come up with.

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WikiCrowd for 2025

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I wrote the first version of WikiCrowd back in 2022 and haven’t really iterated on it much since, beyond adding the odd new set of image categories, and removing features that I decided were not optimum.

At the 2025 Wikimedia Hackathon however, WikiCrowd came up as both an entertaining little game to show people during beers, and also a project similar (ish) to something Daanvr was working on (I think it was Suggestion-Engine-Commons-prototype ?)

Upgrades

During the hackathon, and in the weeks following, WikiCrowd went through quite a number of changes

  • The YAML config files for the pre-calculated depicts statements are now on Commons for all to edit
  • Generation of the questions has been spruced up to stop it breaking as it gets deeper into category trees
  • Generation can now be triggered in the UI, as can deleting pending questions
  • The old one by one image mode was removed, and instead replaced by a grid mode
  • More categories and depict options were added
  • A custom grid view was added, allowing users to specify their own category and or Wikidata item
  • Ability to zoom in on an image being displayed
  • Addition of “levels” of questions
  • Display of Wikidata labels and descriptions in the UI (Making use of the new REST API)

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WikiCrowd at 50k answers

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In January 2022 I published a new Wikimedia tool called WikiCrowd.

This tool allows people to answer simple questions to contribute edits to Wikimedia projects such as Wikimedia Commons and Wikidata.

It’s designed to be able to deal with a wide variety of questions, but due to time constraints, the extent of the current questions covers Aliases for Wikidata, and Depict statements for Wikimedia Commons.

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Wikidata ontological tree of Trains

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While looking working on my recent WikiCrowd project I ended up looking at the ontological tree of both Wikidata entities and Wikimedia Commons categories.

In this post, I’ll look at some of the ontology mappings that happen between projects, some of the SPARQL that can help you use this ontology in tools, and also some tools to help you explore this complex tree.

I’m using trains as I think they are fairly easy for most folks to relate to, and also don’t have a massively complex tree.

Commons & Wikidata mapping

Depicts questions in WikiCrowd are entirely generated from these Wikimedia Commons categories, such as Category:Trains & Category:Steam locomotives. These are then mapped to items on Wikidata such as Q870 (train) & Q171043 (steam locomotive).

Wikimedia Commons categories quite often contain infoboxes on the right-hand side that link to a variety of resources for the thing the category is covering. And quite often there is a Wikidata item ID present, this is the case for the categories above.

Likewise on Wikidata statements for P373 (Commons category) will often exist for entities that are depicted on Commons.

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A first look at WikiCrowd

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I have quite enjoyed the odd contribution to an app by Google called Crowdsource. You can find it either on the web, or also as an app.

Crowdsource allows people to throw data at Google in controlled ways to add to the massive pile of data that Google uses to improve its services and at the end of the day beat its competition.

It does this by providing a collection of micro contribution tasks in a marginally gamified way, similar to how Google Maps contributions get you Local Guide points etc. In Crowdsource you get a contribution count, a level, and a metric for agreements.

While I enjoy making the odd contribution when bored out of my mind and enjoy looking at the new challenges (currently at 2625 contributions), I always think that data like this should just be going out into the world under a free licence to benefit everyone.

So finally, introducing WikiCrowd, an interface, and soon to be app, that I developed over the new year period.

WikiCrowd Overview

WikiCrowd is hosted on toolforge and can be found at https://wikicrowd.toolforge.org/ (Source code on Github)

In order to contribute, you need some knowledge of the world, a Wikimedia account and that’s it!

Screenshot showing the wikicrowd application, listing various groups of questions users can contribute to

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Wikimedia Commons Android App Pre-Hackathon

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The Wikimedia Commons Android App allows users to upload photos to Commons directly from their phone. The website for the app details some of the features and the code can be found on GitHub. A hackathon was organized in Prague to work on the app in the run up to the yearly Wikimedia Hackathon which … Read more