N5 remote dataset not recognized as multi-scale

[chourroutm]

Context

While trying to "Add Remote Zarr / Neuroglancer Precomputed / N5 Dataset", my N5 dataset at n5://gs://ucl-hip-ct-35a68e99feaae8932b1d44da0358940b/S-20-29/brain/19.57um_complete-organ_bm18/ is not recognized as multi-scale: Magnifications is only 1-1-1, only the layer s0 is recognized. Besides, the voxel size is not read properly.

(The dataset comes from the Human Organ Atlas project; DOI: http://doi.org/10.15151/ESRF-DC-1773692859; permalink: https://human-organ-atlas.esrf.fr/datasets/1773694684)

Expected Behavior

The 5 scales s0 through s4 should be recognized, along with their voxel sizes.

Current Behavior

Magnifications is only 1-1-1, only the layer s0 is recognized. Besides, the voxel size is not read properly.

Steps to Reproduce the bug

• Cannot reproduce the bug anymore / needs deeper investigation.

1. Try to load the public dataset from n5://gs://ucl-hip-ct-35a68e99feaae8932b1d44da0358940b/S-20-29/brain/19.57um_complete-organ_bm18/ in the Webknossos "Add Remote Dataset" tab.
2. On the next tab, a few informations are wrong.
3. (This also slows down loading the data in the viewer and prevents to zoom out to see the whole field of view.)

This is what Neuroglancer detects:

Your Environment for bug

• Browser name and version: Firefox 136.0
• Operating System and version: Windows 11
• Version of WEBKNOSSOS (Release or Commit): official instance version 32053
• Specific to long-running jobs (set jobsEnabled=true in application.conf)
• Specific to webknossos.org (set isDemoInstance=true in application.conf)

[fm3]

Hi and thanks for your detailed report! We’ll have a look and keep you posted.