API for Indexing along arbitrary dimensions

[j08lue]

Hi team, have you considered solutions for a TiTiler API for indexing along arbitrary dimensions yet?

Working on the UK EO Data Hub, we are planning on publishing Zarr data cubes that are based on CMIP6 or UKCP18 and have the SSP or global circulation model as well as threshold temperatures as dataset dimensions (works great with STAC datacube extension).

Xarray has .sel and .isel. Would be nice to expose that in the UI somehow.

Are there any existing thoughts or concepts for this?

Else we’ll just come up with something for the UK EO Data Hub TiTiler and share back here

• Support for indexing along arbitrary dimensions in a Zarr datacube EO-DataHub/titiler#3

[vincentsarago]

I'll answer from titiler.xarray POV (because titiler-multidim doesn't have any custom code for data access)

right now we select on time, and default on the first one https://github.com/developmentseed/titiler/blob/6d1519e9a289a1f1f8e15c04020920f82cf02c60/src/titiler/xarray/titiler/xarray/io.py#L175-L187 but technically

I've already updated rio-tiler to better define indexing cogeotiff/rio-tiler#764 (and started cogeotiff/rio-tiler#779 which is slightly related)

We latest version of rio-tiler we could introduce arbitrary indexing

This was also mentioned in developmentseed/titiler#1099