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torchvision.datasets.voc: update dataset and project site URLs - #9216

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NicolasHug merged 2 commits into
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carandraug:fix-pascal-voc-url
Mar 5, 2026
Merged

NicolasHug merged 2 commits into
pytorch:mainfrom
carandraug:fix-pascal-voc-url

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@carandraug

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The location for the PASCAL VOC datasets 2005-2012 has changed as well as the location of the project website. This PR updates the URLs for the new locations. The previous system host.robots.ox.ac.uk is no longer online.

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pytorch-bot Bot commented Sep 15, 2025

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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/vision/9216

Note: Links to docs will display an error until the docs builds have been completed.

❌ 5 New Failures, 4 Pending, 7 Unrelated Failures

As of commit f7fb984 with merge base b8667f0 (image):

NEW FAILURES - The following jobs have failed:

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

This comment was automatically generated by Dr. CI and updates every 15 minutes.

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@AntoineSimoulin

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Hey @carandraug, thanks for posting and proposing a fix. Where did you find the announcement about the new URLs? Do you know if this new address is the official long-term address for the dataset?

@carandraug

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Where did you find the announcement about the new URLs?

I am the sysadmin of those systems.

Do you know if this new address is the official long-term address for the dataset?

Yes, this will be the official long-term address for those datasets. There will be redirect in places from the old URLs to the new ones but other issues are delaying the setup of such redirects.

@carandraug

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Is there a particular reason for the delay here which is just a URL fix? If you need a document clarifying my authority as the maintainer of those systems, can you clarify what sort of statement you require?

@carandraug

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The host server that was originally serving the datasets is now back online with permament redirects in place to the new URLs mentioned in this PR. I hop that counts as some sort of authority and this PR gets considered.

},
"2009": {
"url": "http://host.robots.ox.ac.uk/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar",
"url": "https://thor.robots.ox.ac.uk/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar",

@NicolasHug NicolasHug Mar 2, 2026

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@carandraug when I try http://host.robots.ox.ac.uk/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar I'm getting redirected to https://www.robots.ox.ac.uk/~vgg/projects/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar , not the the thor domain. Can you clarify which one is the official redirection? Thanks!

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That is only the first redirect. If you try to download https://www.robots.ox.ac.uk/~vgg/projects/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar, there is as second redirect to https://thor.robots.ox.ac.uk/pascal/VOC/voc2009/VOCtrainval_11-May-2009.tar. The reason for this two redirects is that host.robots.ox.ac.uk hosted the evaluation server and the website. The website was under the host.robots.ox.ac.uk/pascal location. host.robots.ox.ac.uk now only runs the evaluation server, and the website was moved to www.robots.ox.ac.uk/~vgg/projects/pascal. But after moving the PASCAL VOC website, we moved the large datasets to the thor server, hence why two redirects. While I could have place all redirects in host, I would need to repeat them in www.robots... to accommodate relative links in the website.

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Thanks for your patience and for fixing the links @carandraug .

@NicolasHug
NicolasHug merged commit 62d4301 into pytorch:main Mar 5, 2026
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3 participants