unpartitioned
The unpartitioned directory will not be a useful data product for
most users. It exists because the sky locations are originally generated in
Legacy Surveys bricks before being re-partitioned into HEALPixels.
The unpartitioned sub-directory contains files assembled according to
which bricks occupy each HEALPixel rather than by which sky locations
occupy each HEALPixel. It is included for completeness.