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INDI Library v1.9.7 Released (29 Jul 2022)

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

Cache DSS overlay images

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How feasible would be to cache some, or even all levels of DSS images for the overlay for offline use? I would like to have a way to pre-cache down to a specified level of detail filtered down for all regions of the sky visible from a specified latitude. Does anybody know how much storage would it require for each level of detail?
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.
1 year 10 months ago #61322

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There is a cache already, but I've done this so long ago I forgot the details. Try increasing the cache size and see if that helps?
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
1 year 10 months ago #61329

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Replied by Andrew on topic Cache DSS overlay images

Thank you for your quick reply.
I am aware of KStars caching some DSS imagery up to a specified amount. However this is predicated on previously loading an area of interest by visiting it in the sky map, and it not being dropped when the cache is full. What I am wishing for is a means to pre-load large swaths of sky automatically at a quality specified by the user based on their needs and storage allowance. I'm thinking the ability to get the data could be included in the KStars Add-On Installer, or a script that builds the collection from the DSS server.
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.
1 year 10 months ago #61334

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Replied by Euripides on topic Cache DSS overlay images

That would be any amazing feature!
4 months 1 week ago #81964

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Replied by Andrew on topic Cache DSS overlay images

Offline storage of DSS images is still on my wishlist. Something more reliable than the existing cache, which is constantly over writing it's contents.
Perhaps a tool that can be run that will fetch images around specific targets of interest? Like how Google Maps can cache an area for offline use.
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.
4 months 1 week ago #82014

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Replied by Andrew on topic Cache DSS overlay images

I found out this feature is in development. Which is fantastic! I've already been playing around with it. But seems there are a few issues to iron out. Good thing I don't have epilepsy!
There are a few glitches in the rendering. The flickering sometimes happens when I zoom in a lot then hit an arrow key to pan the view. I noticed sometimes the view doesn't update until I pan that way, but the flickering is only when very zoomed in. The background scale also doesn't always match the zoom level.
Thank you!
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: Jasem Mutlaq
3 months 2 weeks ago #82526

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Thank you for the report, I pushed some fixes to master to mitigate some of these issues.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
3 months 2 weeks ago #82537

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Replied by Andrew on topic Cache DSS overlay images

This is already much better. Thank you.

I took it upon myself to try adjusting the rendering levels. I appear to get improved performance by setting int level = 2, minfov = 60, minfov /= 3. That seems to work well with only level 3 and 5 available and doesn't try to load too much level 3 detail at once. But that should probably only be changed when offline cache is used. So that might be worth considering. It might also be a worthwhile to have Level 2 images in the cache as well.
I should also mention I'm testing this on a Pi4 8gb with a USB3 SSD system drive, so the read speed are about as good as it can be on a Pi4 B+.
Thanks again.
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.
3 months 2 weeks ago #82562

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