Nested collection support

[faoFurkanMacit]

Hi, as you may know stac specification supports a collection having other collections as children. However, i do not think the application supports that at the moment. Do you have a future plan for such feature, if not can you give me a guideline to implement that ? Thanks

[jonhealy1]

Hi @faoFurkanMacit This is supported presently by setting the parent link in a stac collection. To find all the children of a collection you would have to crawl your collections and create a graph. I am not sure how this could be improved but I am definitely interested in hearing any ideas.

[faoFurkanMacit]

Correct me if i am wrong but even if we make the parent link of children collections we still are not able to get the child using an endpoint like below
{base_url}/collections/{parent_collections}/{child_collection} .
Couldn't it be made more natively ?

[jonhealy1]

Hi. You are correct. To introduce a better way to crawl collections you would have to propose changes to the STAC api spec itself or maybe propose a new STAC extension that could add new routes to STAC apis like this one.

[jonhealy1]

I see that there is a children extension already here - we would have to add support for something like this to sfeos

[faoFurkanMacit]

That seems useful however, i believe there should be a way to achieve that without having that extension because it is just a proposal and stac spec has been allowing collections having another collection as a child. Unfortunately i was not able to find a published, good example