Catalog

[ccancellieri]

Hi all,
I'm getting lost when I try to create my Catalogs, I work in a quite large infrastructure where I need to maintain several Catalogs instances (one per organization) and I would like to delegate the management of the catalogs to an application managing all the collections (with permissions etc).

This page:
https://stacspec.org/en
Says:
STAC Catalog is a simple, flexible JSON file of links that provides a structure to organize and browse STAC Items. A series of best practices helps make recommendations for creating real world STAC Catalogs.

I tried to mount multiple instances of this application under the same endpoint to simulate different Catalogs with no success due to a customized way to manage the base_url

stac-fastapi/stac_fastapi/types/stac_fastapi/types/requests.py

Line 6 in 4491fa1

def get_base_url(request: Request) -> str:

So the point of this discussion are:

1. The Catalog spec looks undervalued here, shouldn't it be the first element of any catalog?
2. Would it be possible to create a Catalog respecting the Specs? (Not just a landing page)
3. Would be interesting to manage more than one Catalog in the same instance?
4. If not could be interesting to have implemented Collections of Collections?
5. If not, would it be possible to mount under a parent application implementing the Catalog Spec? It's a fastAPI application, it should be possible...

Also I tryed to discuss it here stac-utils/stac-fastapi-elasticsearch-opensearch#308 with no success as explained here: stac-utils/stac-fastapi-elasticsearch-opensearch#308 (comment)

This is why I thought it's worth to make an attempt to discuss it here before we give up implementing our fastapi based on pystac.

[PengyuHao-FAO]

I hope to have multiple catalogs in a STAC catalog

[tloubrieu-jpl]

No answer, but a question, I would like to have multple catalogs in a server I wanted to derive from stac-fastapi. Is it possible ?

[jonhealy1]

If someone wants to create a Catalog stac-api extension, we can add it to stac-fastapi-elasticsearch-opensearch. I would think something like http://localhost:8080/catalogs/{catalog_id}/collections/{collection_id}.

[tloubrieu-jpl]

Thanks, I could look into that.

For now I will have a work-around with a single catalog, so to have a PoC of my server for our planetary observations, and make myself more familiar with the stac-fastapi libraries.

Then I can come back to the multi-catalog feature which will be useful as I want to group the collections by planetary body catalogs.