Searching and the anti-meridian

[rowanwins]

I've noticed some quirky behaviour when using a bbox search that sometimes the results include items which cross the anti-meridian.

For example this I was searching for items in the middle of Australia using a query like
https://planetarycomputer.microsoft.com/api/stac/v1/search?collections=landsat-8-c2-l2&bbox=129.885371,-29.068322,137.230638,-23.538097&ids=LC08_L2SR_072076_20211222_02_T2
Note I've included the item id in the above query just so it's obvious :)

The results include this item.
https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-8-c2-l2/items/LC08_L2SR_072076_20211222_02_T2
The item has a geometry which travels from 179.2700366 to -178.1091546 and so it wraps around the world.

Ah the joys of dealing with the anti-meridian :)

Cheers
Rowan

[rowanwins]

Looking further at that geometry one of the coordinates is placed at 117.919754, -24.1680886 which is on the west coast of Australia, but judging by the thumbnail and the rest of the coords it looks like it should be over the pacific, so that seems problematic as well, I can't quite work out how you'd adjust the coords using +/- 360 to generate a useful geometry... so maybe something has gone astray during the geometry processing?

[TomAugspurger]

@rowanwins I believe @pjhartzell fixed some antimeridian issues in stactools-packages/landsat#30. Those fixes are in the landsat-c2-l2 collection. We recommend you use that (it also includes imagery from Landsat-9).

Looking at the "preview" link from the item you shared and the equivalent landsat-c2-l2 item, we have:

Collection	Link	screenshot
landsat-8-c2-l2	https://planetarycomputer.microsoft.com/api/data/v1/item/map?collection=landsat-8-c2-l2&item=LC08_L2SR_072076_20211222_02_T2
landsat-c2-l2	https://planetarycomputer.microsoft.com/api/data/v1/item/map?collection=landsat-c2-l2&item=LC08_L2SR_072076_20211222_02_T2

[rowanwins]

Thanks for the info @TomAugspurger , happy to close or leave open until the issue is more widely resolved across collections

[TomAugspurger]

We've deprecated the landsat-8-c2-l2 collection and aren't planning to update those existing items, so I'll close this. But let me know if you do spot similar issues with other collections.

[rowanwins]

Just one final note that there is a STAC extension for flagging collections as deprecated so that might be worth looking into.

[TomAugspurger]

Yep, thanks. We're working out our versioning strategy right now.