Accessing multiresolution neuroglancer data

[tathey1]

I often use CloudVolume to access precomputed data that is stored on some server. Is it possible to use this to access the ome-zarrs that are being served for BIL neuroglancer visualization?

I'm asking because, while standard BIL downloads (e.g. here) only offer a couple sampling resolutions (e.g. 0.35x0.35x1, 0.35x0.35x100, 3.5x3.5x100), it seems like the ome-zarr copy of the data has more resolutions available.
My goal is to be able to, in python, select a resolution level, then download a specific spatial area (e.g. using numpy-like indexing). Do you have any example code snippets that do something like this?

[AlanMWatson]

Hi Tom,

If you search for a dataset at BIL and it returns a visualization link, then we have a converted version of that data that can be accessed through BrAinPI.

Serarch results for mouseID_405426-182724:
https://api.brainimagelibrary.org/web/list?fields=FullText&searchtxt=mouseID_405426-182724

The dataset landing page:
https://api.brainimagelibrary.org/web/view?bildid=ace-bag-kit

The visualization link:
https://brainapi.brainimagelibrary.org/ng/bil/assets/ace/bag/kit/asset/brainpi/mouseID_405426-182724.omehans

This is also the link to the the precomputed version of the data. just add /info to get the metadata file:
https://brainapi.brainimagelibrary.org/ng/bil/assets/ace/bag/kit/asset/brainpi/mouseID_405426-182724.omehans/info

The path_to_html_options endpoint returns several file format options. There is no easy way yet to get to this endpoint yet, but if strip the /bil/assets/... portion of the neuroglancer link and pass it to the endpoint as below it will return links to several dataformats including ome-zarr:
https://brainapi.brainimagelibrary.org/path_to_html_options/?path=/bil/assets/ace/bag/kit/asset/brainpi/mouseID_405426-182724.omehans

Let me know if you have any other questions.