[Kstars-devel] UID for skyobjects proposal

[Akarsh Simha]

On Tue, Jul 07, 2009 at 07:01:15PM +0400, Alexey Khudyakov wrote:
> On Tue, Jul 7, 2009 at 6:19 PM, Akarsh Simha<akarshsimha at gmail.com> wrote:
> >
> > Shouldn't we also have some sort of classification based on catalog?
> > Suppose in the future, we decide to support a variety of object
> > catalogs - Caldwell, UGC, PGC, Herschel, Collinder etc, our system
> > should work even there.
> >
> > I was wondering if it would be better to classify deep-sky objects
> > based on catalog rather than by type.
> >
> > I have no objections to this.
> >
> No I think UID should be generally independent of catalog.
> 
> One object could belong to many catalogs: HD/SAO/GSC or Messie/NGC/PGC
> etc. Ideally we should be able to display information from all
> catalogs, add them if needed. It's one to many correspondence (one
> object <=> many catalogs). So I don't think it's really good idea.

Yes, I agree. But then, how do you propose we handle an expansion of
catalog support?

> I think better idea is to keep only essential information in
> SkyObject. For stars it's RA/dec, magnitude, proper motion, color
> index. Everything else could be loaded on request. For example when
> details dialog is viewed. There could be problems with matching UIDs
> between catalogs with searching. I think design space is rather big.

I don't get you here. What is "everything else"? You mean the various
catalog names? Anything else?

Regards
Akarsh