Using in-memory DataArray in titiler.xarray

[davidbrochart]

I understand that TiTiler's API needs a url query parameter to point to the dataset to serve. This URL can be file://path_to_dataset if the dataset is local. For an xarray.DataArray, this forces users to store it e.g. in a Zarr dataset, which looks like an unnecessary step. Is it possible to point TiTiler directly to an in-memory DataArray?

[vincentsarago]

Yes you could totally make this.

The path_dependency https://github.com/developmentseed/titiler/blob/main/src/titiler/xarray/titiler/xarray/factory.py#L37 can be whatever. Then you need to set the reader https://github.com/developmentseed/titiler/blob/main/src/titiler/xarray/titiler/xarray/factory.py#L35 to be rio_tiler.io.xarray.XarrayReader (which only accept DataArray).

See https://github.com/developmentseed/titiler/blob/main/src/titiler/xarray/examples/local.py ;-)

[davidbrochart]

Awesome, thanks @vincentsarago.

[davidbrochart]

BTW I noticed some errors with TilerFactory's type annotations:

• reader is of type Reader, but XarrayReader seems to be unrelated?
• path_dependency is a callable that returns a str, but we're giving it a callable that returns a DataArray.

[vincentsarago]

👍 fixed in #1155

[davidbrochart]

That was fast, thanks!