Minimal Pystac STAC

[ljstrnadiii]

Another question as I try to get started with stackstac.

I am hoping to build a small collection/catalog for a set of 20ish zoom 10 tiff files that are contiguous in space. Is there any goal or example of building a minimal STAC catalog for something like this to demonstrate usage with stackstac?

I am not exactly sure what are the minimal set of attributed for each item in order to operate with stackstac correctly. Any guidance would be greatly appreciated!

[gjoseph92]

You're trying to make a standalone/static STAC catalog? I think @scottyhq has been playing with this, see #86.

Generally the idea of a single zipfile you can download that includes both a STAC and some assets could be helpful (also would be helpful for stackstac's tests). I've wanted this at times. Currently I think people have more commonly been using the free public datasets hosted on AWS or Azure to try out stackstac.

If you just want to experiment with things, there's also a link to try stackstac in binder on the README. Or I highly recommend signing up for Planetary Computer and using the Hub, which includes some nice example notebooks, has a prebuilt software environment, and lets you spin up dask clusters easily.

I am not exactly sure what are the minimal set of attributed for each item in order to operate with stackstac correctly. Any guidance would be greatly appreciated!

I should make a reference page for this on the docs. For best results, you'll want your STAC items to:

1. Use the proj extension, specifically:
   1. proj:epsg
   2. proj:transform
   3. proj:bbox
   4. proj:shape
2. Have single-band assets
3. Specify the type of each asset (image/tiff, etc.)

[ljstrnadiii]

Sweet. Thanks for sharing.

Yeah, I guess I am trying to build a static STAC catalog. This is all very new to me, so I am just getting familiar to be honest. We get out tiff files from earth engine and have been talking about building a stac catalog for regions we download data for. I suppose it would be a static catalog on gcs and update when we add a new collection if that ends up making sense.

Thanks for the details! I'll make sure to add.

[gjoseph92]

You could look at https://github.com/developmentseed/rio-stac; it's a utility for generating STAC metadata out of GeoTIFFs. Only works on a single file, but combined with pystac you could probably make something to generate metadata for a whole catalog of files. I imagine there are tools/examples of doing this, but I'm not familiar with them.