v2: region, bins, healpix, ztffields

[MickaelRigault]

Hi @mcoughlin you mentioned you wanted to use astropy regions, this is what you had in mind right ?

https://astropy-regions.readthedocs.io/en/stable/

[mcoughlin]

@MickaelRigault Yup! We have some example interactions coded up here: https://github.com/skyportal/skyportal/blob/main/skyportal/handlers/api/instrument.py#L519 too.

[MickaelRigault]

This seems close to shapely: https://shapely.readthedocs.io/en/stable/manual.html Which is a very powerful tool coupled with pandas inside geopandas (and super fast).

I'll have a closer look.

[MickaelRigault]

haha:

https://astropy-regions.readthedocs.io/en/stable/shapely.html

[mcoughlin]

@MickaelRigault Indeed. To me, the important thing is interactions with the healpix stuff.

[MickaelRigault]

do you have an example of that too (never used it before)

[mcoughlin]

@MickaelRigault healpy has nice utility functions for extracting indices from shapes: https://healpy.readthedocs.io/en/latest/generated/healpy.query_polygon.html @lpsinger has nice utility functions too in ligo.skymap: https://git.ligo.org/lscsoft/ligo.skymap/-/tree/main/ligo/skymap/tool depending on what exactly is needed. He also made an overlap calculator for doing the overlaps in postgres directly: https://github.com/skyportal/healpix-alchemy which has nice examples too.

[MickaelRigault]

@mcoughlin For simplicity, I have move the implementation of the refreshed simsurvey here: https://github.com/MickaelRigault/skysurvey

I currently call it skysurvey, we can easily merge it with simsurvey if we want to keep the simsurvey "brand".

Moving the discussion above there.

You will see basic implementation started.

[mcoughlin]

Really interesting @MickaelRigault! Personally I think that yes this should become the new simsurvey. Presumably the tag should be a 1.X release to indicate potentially breaking changes once it is ready.

[MickaelRigault]

Fine by me