The astrometry task currently depends as astrometry.net as the only possible algorithmic back end. This also has created a dependency on the astrometry.net file format.
This task will remove the dependency on astrometry.net file format and will implement the current HSC astrometry solver in the astrometry task. This will focus on solving single chips, not the full focal plane.
DM-167 (which was closed with reference to this ticket) requests that we split photometric and astrometric catalogues, and this is still needed.
JK: In PMCS this would be Krughoff S and Owen R