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the default healpix expression is different in master, since it was indeed really gaia specific. However, the default for nested or not i'm not sure about, I have a preference for it since it is easy to go to coarser level by simply dividing. (I don't think you can do that for ring right?).
Hi Maarten,
I found my way with the methods. I suggests to update the documentation and make the healpix_plot expression more standard or a necessary argument.
I also prefer the nested structure. But that's something I did not see obvious when I made some data.
The current API is based on Gaia defaults which are not obvious outside Gaia:
healpix_expression='source_id/34359738368', ... nest=True, ...
These are not the defaults in healpy. Healpy by defaults does
nest=False
for instance.Maybe providing a virtual column that does the healpix calculations from RA, DEC columns similarly to the coordinate conversions?
maybe adapting properly something like:
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