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radiantearth / stac-spec

SpatioTemporal Asset Catalog specification - making geospatial assets openly searchable and crawlable
https://stacspec.org
Apache License 2.0
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Include CBERS-4 MUX example #70

Closed fredliporace closed 6 years ago

fredliporace commented 6 years ago

Hi @cholmes , I'll start working on a CBERS example to be included into the repo, as the first pass of generating a static catalog based on the current CBERS on AWS content.

Opening this to discuss the implementation.

Those who are interested in the dataset may obtain more information in https://github.com/fredliporace/cbers-on-aws

cholmes commented 6 years ago

That'd be awesome @fredliporace! Though hold off for a bit, as we're in the midst of shifting some core fields. The dev branch should have an almost up to date json schema (except time stamp needs to be udpated), but it doesn't have the updated samples yet. I'm hoping to do that this week. Also cc @matthewhanson who is working on an Earth Observation profile, which will be relevant to share more fields past just the core.

cholmes commented 6 years ago

See https://github.com/radiantearth/stac-spec/milestone/3 for the issues that are settling in soon.

matthewhanson commented 6 years ago

@fredliporace I'm working on the EO profile/extension now, I'll have a PR up by tomorrow, then I think it's a good time to have examples of actual data (as @cholmes said, the EO profile will make the examples more relevant). I'll be able to provide some for landsat-8 and sentinel-2.

fredliporace commented 6 years ago

@matthewhanson @cholmes OK, I'm already working on an exercise to generate a CBERS-4 MUX Item using the current spec, it seems to me that an adaptation to the new spec will be then easier.

The mapping between CBERS-4 MUX metadata and STAC seems to be straightforward. The only question that occurs to me at this point is how to deal with the multiple CBERS-4 payloads, 4 cameras with distinct features. In that particular sense CBERS is different from LS8(*)/S2.

Anyway, I'll review that considering the new spec/profiles as soon as they are available.

(*) LS8 OLI/TIRS are distinct cameras but generate data 'in tandem' and with similar geometric characteristics/coverage, which is not the case for CBERS-4.

matthewhanson commented 6 years ago

@fredliporace That sounds like the right approach to me. The different CBERS-4 instruments would be different collections, or products, see #63

fredliporace commented 6 years ago

Implementation in #77

cholmes commented 6 years ago

I think we didn't quite get this finished for 0.4.0. I'm happy to merge in before a 0.5.0 'release' since it's just an example in the core stac repo.

fredliporace commented 6 years ago

Changing issue scope, see #98

fredliporace commented 6 years ago

Duplicate of #98