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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

DSS Offline HiPS

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Replied by Giles on topic DSS Offline HiPS

OK, attached are both trackers for Norder6 and Norder7, they're gziped due to attachment type restrictions.
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1 year 9 months ago #83262
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Replied by Giles on topic DSS Offline HiPS

Bundled Norder1 - 4 together, these are probably not generally necessary, but for completeness. Also have added Norder5
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Last edit: 1 year 9 months ago by Giles.
1 year 9 months ago #83263
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Replied by Euripides on topic DSS Offline HiPS

All looking good, torrents are up and running.
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1 year 9 months ago #83264

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Replied by Giles on topic DSS Offline HiPS

Perfect, as the number of seeders goes up I will gradually reduce my allowed upload rate (it's more or less at maximum right now).
1 year 9 months ago #83265

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Replied by Jasem Mutlaq on topic DSS Offline HiPS

Why not bundle all of them together in a single torrent?
1 year 9 months ago #83278

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Replied by Giles on topic DSS Offline HiPS

I think some people might have Norder3 and Norder5 from the dropbox at the beginning of the thread, and many won't want Norder6 and Norder7 because they are too much data for their needs. So I thought Norder1-4 (it's small enough anyway), Norder 5 (bit bigger), Norder6 (large), Norder7 (very large).

I don't think we can selectively choose which parts of a torrent we can choose to download? Correct me if I've made a mistake. Perhaps you can, and I can just create a torrent to my /usr/share/kstars/HIPS and people can choose what files to get?
1 year 9 months ago #83280

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Replied by Andrew on topic DSS Offline HiPS

We can selectively skip and give priority to files within a torrent.
I'm going to grab nordrer 1-4 and see if it's possible to reduce the image data with indexed colours. Report back later.

Edit: Nope, can't use indexed colours.
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Last edit: 1 year 9 months ago by Andrew.
1 year 9 months ago #83281

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Replied by Steve on topic DSS Offline HiPS

Thanks !
1 year 9 months ago #83282

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Replied by Jasem Mutlaq on topic DSS Offline HiPS

Good point, probably 1-5 is enough for most people out there. Doesn't 6 and 7 causes KStars to freeze?
1 year 9 months ago #83292

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Replied by Giles on topic DSS Offline HiPS

It's not freezing on my system, but I'll compare resource usage this weekend, I've only tested on my desktop, which has 64GB ram, might make less resourceful systems start swapping I suppose.
1 year 9 months ago #83293

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Replied by Euripides on topic DSS Offline HiPS

If I am not mistaken, this is possible: if for example you create a folder HIPS and then subfolders Norder1, Norder2 etc, then the user can select those subfolders individually through the torrent client.

But to be honest, I do not think that there is any need to do that now, it works greats just like you 've done it (thank you for that again!)

The whole point now is the seeding :-)
1 year 9 months ago #83295

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Replied by Giles on topic DSS Offline HiPS

I found the following Table online in this document (page 11): www.ivoa.net/documents/HiPS/20170406/PR-HIPS-1.0-20170406.pdf
First item is the Norder, second is the number of files (or tiles), third item is the angular size of each tile, fourth item is the angular size of each pixel in each tile.
So for example, if you are wishing to use the HiPS for framing, this tells you that Norder5 provides you with 12.88 arc seconds per pixel, which each tile being 1.832 degrees across.
Norder7 has each tile 27.48 arc minutes across, with a pixel size of 3.221 arc seconds.

FYI, Norder8 would be around 78GB in size, with a pixel size of 1.61 arc seconds (it appears to halve as you raise the HiPS order by 1)

0 12 58.63° 6.871'
1 48 29.32° 3.435'
2 192 14.66° 1.718'
3 768 7.329° 51.53”
4 3072 3.665° 25.77”
5 12288 1.832° 12.88”
6 49152 54.97' 6.442”
7 196608 27.48' 3.221”
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1 year 9 months ago #83297

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