NGC Thumbnails

[Jasem Mutlaq]

I just added them to KStars. I used your name "John S." and email address.
Please let me know if you want to change any of those as they appear in the
download dialog. I'll try to add previews as well since we do not have
previews for _any_ download before.

On Mon, Apr 17, 2017 at 7:44 PM, John S. <myxlflik at hotmail.com> wrote:

> Did anyone have any further input on this?  Is it worth pursuing and
> adding to Kstars?
>
>
>
> ------------------------------
> *From:* John S. <myxlflik at hotmail.com>
> *Sent:* Saturday, April 15, 2017 11:00 AM
>
> *To:* Hans
> *Cc:* KStars Development Mailing List
> *Subject:* Re: NGC Thumbnails
>
>
> Here is a link to the current NGC file tarball and the rudimentary install
> and removal scripts.  This has only been tested on Linux Mint, but suspect
> it will be fine on all versions:
>
> https://1drv.ms/u/s!AnSnRFrNRtfXviEYxBIM2pNlmuc6
>
>
> Here is a link to the current IC file tarball.  Same caveats as the NGC
> file:
>
> https://1drv.ms/u/s!AnSnRFrNRtfXviLmrzlp6Ru6N7KZ
>
> The images are all of the DSS2R (Red Plate) survey only.  There is an
> ability to pull data into RGB using the DSS2R, DSS and DSS2B surveys (or
> really any other combination for that matter).  I have found that in nearly
> all cases, the colors needed subsequent adjustment in order to make the
> images look palatable.  I honestly felt the red channel ones and gray scale
> worked out just find overall.  I know there are some outright bad images in
> there and I haven't had the time or inclination to weed through the 13,000
> objects I pulled to clean it up as of yet.  I can certainly do it, but it
> would largely depend on how strongly this group felt about it's inclusion.
> I agree it should be an add-on package and not part of the base install.
> We will need to make sure to credit the sources of the images as well.
>
>
> One thing we may need to consider is directory management.  Downloading
> all of these images puts 13,000+ files in the $HOME/.local/share/kstars
> directory.  That's a pretty good chunk of files for a single directory.  I
> may make sense to compile these into some sort of database file or put them
> in a directory structure.  I am not a developer though and have NO skill
> when it comes to that aspect of this project.
>
>
> John
> ------------------------------
> *From:* John S. <myxlflik at hotmail.com>
> *Sent:* Saturday, April 15, 2017 10:15 AM
> *To:* Hans
> *Cc:* KStars Development Mailing List
> *Subject:* Re: NGC Thumbnails
>
> I started this project for my own personal gratification. I personally
> don't mind that some of the objects are subpar quality. Most of those
> objects are very interesting to me anyway. However, I would like to make
> sure that it meets certain quality levels. I am open to input for how to
> rectify the situation. I believe the limits of the survey itself will limit
> the outlet quality though. If you want I'll post the links to the two
> tarballs for the NGC and IC objects and you can download them a try for
> yourself.
>
> John
>
> > On Apr 15, 2017, at 9:02 AM, Hans <hans at lambermont.dyndns.org> wrote:
> >
> > Agreed, this is something very nice to have. And it is tedious work
> too.  For
> > images that don't look too good I expect we'll even get negative
> remarks, but
> > that should not inhibit this project. To me having a skimpy image is far
> better
> > than no image at all.
> >
> > Is the idea to have an image library or to dynamically download them on
> demand ?
> >
> > -- Hans
> >
> > Jasem Mutlaq wrote on 20170415:
> >
> >> I'm attaching a few examples so you can see why we can't use them as is
> in
> >> KStars.
> >>
> >>> On Sat, Apr 15, 2017 at 9:43 AM, Akarsh Simha <akarshsimha at gmail.com>
> wrote:
> >>>
> >>> Hi
> >>>
> >>> This is something very nice to have!
> >>>
> >>> A caveat to consider is the licensing for DSS imagery. They are not
> >>> available for commercial use, so we must ship this as an add-on through
> >>> KNewStuff ("Get New Data")
> >>>
> >>> Other sources of images are SDSS, the Hubble Legacy Archive (
> hla.stsci.edu)
> >>> and the recently released PanStarrs 1 survey. I think the PanStarrs 1
> >>> survey has a large sky coverage (possibly even all sky -- I haven't
> >>> checked). SDSS has a somewhat small footprint, and the Hubble only has
> >>> objects of interest.
> >>>
> >>> I didn't quite get what the problem involved is. The DSS is made from
> >>> digitizing scanned plates mostly from the Palomar Observatory and UKSTU
> >>> telescope. The result is that many plates have artefacts, and they are
> >>> completely uncalibrated. Planetary nebulae and bright emission nebulae
> tend
> >>> to be overexposed. There is no way around these problems other than
> going
> >>> to other surveys.
> >>>
> >>> Regards
> >>> Akarsh
> >>>
> >>>
> >>
> >>
> >> --
> >> Best Regards,
> >> Jasem Mutlaq
> >
> >
> >
> >
> >
>



-- 
Best Regards,
Jasem Mutlaq
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kstars-devel/attachments/20170418/f76ddde3/attachment-0001.html>