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It looks like this is the third time in two days @ayw has posted this link, each time with a different #hash at the end (to fool HN's anti-duplicate-posting code?).

Genuine question here, is that kind of duplicate posting behavior allowed, or is it just that Scale (which powers this dataset and which from past posting behavior @ayw seems to be connected with) is a YC company?

From https://news.ycombinator.com/newsfaq.html

Are reposts ok?

If a story has had significant attention in the last year or so, we kill reposts as duplicates. If not, a small number of reposts is ok.

Please don't delete and repost the same story; accounts that do that eventually lose submission privileges. Deletion is intended for things that shouldn't have been submitted in the first place.

The dataset is actually released by nuTonomy. Scale annotated the data.

Another is the Berkeley Deep Drive dataset.

http://bdd-data.berkeley.edu/

Can anyone remark on the notable differences?

Berkeley is only images, no LIDAR/RADAR or 3D annotations.

"open-source" as in "CC-BY-NC-SA 4.0" + "Some datasets and indicators are provided by third parties and may not be redistributed or reused".

Show HN: NuScenes – largest open-source self-driving dataset ever