App size very large. User Data question.

Improve101

Hi all,

Have noticed the AsiAir app on my phone is about 4x larger than the second largest app on my phone, and looking at it a little closer the User Data category for the AsiAir app is huge.. What could this be? Can i purge this somehow yet keep my configured settings? Thanks!

App breakdown:
App 1.34GB
User Data: 3.4GB (not sure why this is so large)
Cache: 79MB.

w7ay

Improve101 User Data: 3.4GB (not sure why this is so large)

Large? That's tiny.

The full astrometry.net database is 32 GBytes. The reason ASIAIR is so limited in Plate Solving is because it only contains a small portion of the astrometry.net data.

Chen

Improve101

w7ay Hi Chen, honestly don't know what this forum would do without you. Thanks for the response, so is that what the User Data folder is for then.. asometric data? If so, for future reference, is there any way to purge that data that you know of, whilst keeping my configured app settings?

w7ay

Improve101 o

There are other stuff too, like stellar database (RA, declination, magnitude, proper motion, star name, etc), but even those are not that large. The HYG (Hipparcos, Yale, Gliese) database is what many people use (free, public domain) for every star down to Mag +7.5, and it is only around 30 MB on my drive (thats mega, no giga).

Aditionally, there are galaxy and nebula databases (Messier, NGC, Index Catalog, Caldwell, etc).

But, I believe most of the storage is for astrometry.net data.

The full database at nova.astrometry.net can plate solve pretty much anything you can throw at it. I have seen it work even with tree branches inside the image. Next time ASIAIR fails to plate solve, grab a JPEG image and upload it to nova.astrometry.net. You will be shocked at how incomplete ASIAIR is.

Chen

Improve101

w7ay All very interesting. I guess then the only way to purge that data then, is to probably delete the app & reinstall it.

w7ay

Improve101 I guess then the only way to purge that data then, is to probably delete the app & reinstall it.

It might not help, since the astrometry.net data is part of the app payload. I don't know if ZWO compresses the payload until it is used.

No harm trying, though.

Chen