s_region problem

[Markus Nullmeier]

On 04/12/17 14:46, Arnold Rots wrote:
> MOC images are handy to look at, but if you want to look at coverage
> superimposed on, e.g., DSS, you want to see the outline of the footprint.

Hmm, the above actually conveys more or less the idea of HiPS images...
MOCs are outline-only, so to speak.

> Besides, if you get beyond order 13 (a far cry from 29), the files get very
> bulky and the response very sluggish.

At least for MOCs, that would be an implementation artefact.
MOC processing can be made very fast and storage comparatively lean.
This includes that for some types of queries acting on even a single
MOC, most of its data does not have to be touched at all.

-- 
Markus Nullmeier            http://www.g-vo.org
German Astrophysical Virtual Observatory (GAVO)