Wikivoyage volunteers need to create banners to place at the top of each article. Thousands of banners like this one:

Wikivoyage banner

Here is the process for each locality in the world:

  1. Example of locality: New York City
  2. Click on the Wikimedia Commons link on the left
  3. Filter out all images whose width is less than 2100 pixels
  4. Select the greatest remaining picture
  5. Select a 2100x300 area within that picture
  6. Save it as a new picture
  7. Upload that picture to Wikimedia Commons, with the same license as the original, and using the {{Image extracted}} template
  8. Set this picture as the banner property of the article's Wikidata item

A webapp that would help with all of that would be wonderful.
At least, are there tools that can help with a few of the steps?

  • The only steps where a human is needed are 4 and 5.
  • At step 5, it would be great if the 2100x300 shape was enforced when selecting. Or even better, if the tool allowed a larger selection, but enforced the same ratio (banner must be 2100x300 or bigger with the same ratio)
  • Extra bonus for the ability to rotate the picture before cropping
  • The best is webapps, but I am OK with software for any operating system.
  • For 3-4 you can use catscan, 5-7 is the good old bug 7757 but there's also croptool.
    – Nemo
    Apr 28, 2015 at 15:52
  • @Nemo: Would a 7757 solution be usable in Wikidata? Croptool says "Internal error" :-/ A croptool-like solution that enforces the width/height ratio would be wonderful :-)
    – Nicolas Raoul
    Apr 30, 2015 at 4:04
  • Wikidata would need to support it (in the interim it would be supported by a string-type qualifier), but first it needs to work in MediaWiki core. :) Pity for the error, are you sure you enabled cookies and everything and did you authenticate successfully? I've not used it recently, please report!
    – Nemo
    Apr 30, 2015 at 6:37
  • I reported already at wikitech.wikimedia.org/wiki/User_talk:Danmichaelo the operator is investigating right now :-)
    – Nicolas Raoul
    Apr 30, 2015 at 7:53

1 Answer 1


Banners can be cropped online using CropTool without editing them in an external picture editor. Another advantage is that most of the necessary file information (author, description, license) is added automatically.

  • Open existing source the file in Commons
  • Select CropTool from the Tools panel on the left
  • (The first time, you have to authorize the tool)
  • Select Aspect ratio: 7:1, press Preview
  • Check the preview, select Upload as new file and type the new file name according to the above instructions
  • Press Upload
  • After successful upload, check the new file and add it to the appropriate category "Category:Wikivoyage banners of "

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