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INDI Library v1.9.8 Released (29 Sep 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

DSS Offline HiPS

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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: 5 months 4 weeks ago by Giles.
5 months 4 weeks 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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5 months 4 weeks 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).
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5 months 4 weeks 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?
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
5 months 4 weeks 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?
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5 months 4 weeks 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.
INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Waveshare Stepper Motor Board - DIY Focuser
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.
The following user(s) said Thank You: Giles
Last edit: 5 months 3 weeks ago by Andrew.
5 months 3 weeks ago #83281

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Replied by Steve on topic DSS Offline HiPS

Thanks !
Mount: AZ-EQ6 GT
Scope: Skywatcher Esprit 100 super APO triplet
Guide: Tecnosky 60
Camera: Canon Ra
Camera guide: Zwo ASI 224MC
Stellarmate on RPI 4 8Gb
5 months 3 weeks 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?
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
5 months 3 weeks 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.
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I blog my progress: www.coochey.net
5 months 3 weeks 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 :-)
5 months 3 weeks 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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I blog my progress: www.coochey.net
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5 months 3 weeks ago #83297

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Replied by Rafa Barberá on topic DSS Offline HiPS

Thank you very much for this info. it's very valuable to know at which Norder you should stop
5 months 3 weeks ago #83298

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