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Element84 / earth-search

Earth Search information and issue tracking
https://earth-search.aws.element84.com/v1
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Two Sentinel-2 L2A collections? #31

Closed fnattino closed 6 months ago

fnattino commented 6 months ago

Hi there! I have noticed that the Earth Search STAC API now lists two collections referring to Sentinel-2 L2A data, sentinel-2-c1-l2a and sentinel-2-l2a. The latter seems to reference both the original JPEG2000 files and COG files, while the former only points to COG files (but from a different bucket?).

Are both collections going to be maintained as such? As we use Sentinel-2 data from this STAC API in the Geospatial Python lesson from the Carpentries, it would be great to know if one of the two collections is going to be dismissed in favour of the others to adapt the material.

Thanks in advance!

matthewhanson commented 6 months ago

Hello @fnattino, the new collection is sentinel-2-c1-l2a, which is a reprocessing of all the newly processed Sentinel-2 scenes is doing as part of Collection 1. Detailed info can be found in the mailing list archive, and I'd recommend you sign up for the mailing list - link in the README of this repo.

Note that the ESA reprocessing is not yet complete, so the sentinel-2-c1-l2a collection is not a complete archive, but it solves several issues with the older sentinel-2-l2a collection. If you don't need older data and primarily interested in data over the last couple years, then use the newer collection.

We'll send out an update to the mailing list when we know more, and will post there before deprecating the old sentinel-2-l2a collection.

fnattino commented 6 months ago

Thank you @matthewhanson for the quick answer and for pointing to the mailing list - just registered today. We'll then migrate to the new collection. Cheers!