Open loreabad6 opened 2 years ago
Things to try:
After further checking, what seems to be the problem is the export step in the pipeline.
It creates weird artifacts on water areas that then result in errors during unwrapping:
The errors are gone using Snaphu Export in SNAP-6, which I have installed locally.
And then unwrapping works:
I found this thread on the STEP forum that might be related, but I am not sure as if this is the case.
My problem is I cannot really test the Export in SNAP 8 Desktop since I don't have it locally. @bro076 I think you have SNAP-8 desktop, could you give it a try? I added a subset of the output of pipeline II here. @ZahraDabiri you have SNAP-7 right? Would you also mind testing?
Thank you both!
good stuff! Yes I have snap 8. I am going to another Oslo meeting for a few days now, but I will try it get it running tonight or tomorrow. Can snap 8 not be installed in the docker?
Yes but only command line for now. I am trying to determine if this is a bug from snappy, from SNAP-8 or from any other source... That's why I want to run the process on Snap-8 Desktop
Hi Lorena,
I did the export, unwrapping, import in the SNAP v7; the results look good
. I saved it on the R drive:
"...\PFG330001_12_SliDEM\04_Work\WP3\DEM generation and Landslide volume estimaiton\test\Snphu" . "out_pipe_II_subset_Snaphu.dim" is the result of the import .
hope it helps :-)
Thanks Ani! Yes looks good so SNAP 6 and 7 work ok... let's see if SNAP-8 Desktop gives issues
Looks great! Sorry I haven't had time today yet to check
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From: Lorena Abad Crespo @.> Sent: Wednesday, November 3, 2021 4:54:27 PM To: SliDEM-project/SliDEM-python @.> Cc: Benjamin Robson @.>; Mention @.> Subject: Re: [SliDEM-project/SliDEM-python] Snaphu export fails for subsets with water in SNAP 8 (Issue #9)
Thanks Ani! Yes looks good so SNAP 6 and 7 work ok... let's see if SNAP-8 Desktop gives issues
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No worries! take your time :)
I ran it in python, and I get the result looks the same as when done in SNAP Desktop
Maybe related but there have been several failures also with the message:
Reading wrapped phase from file Phase_ifg_IW1_VV_19Jul2018_13Jul2018.snaphu.img
No weight file specified. Assuming uniform weights
No brightness file specified. Using interferogram magnitude as intensity
Reading correlation data from file coh_IW1_VV_19Jul2018_13Jul2018.snaphu.img
Calculating topography-mode cost parameters
Despeckling intensity image
Normalizing intensity
Intensity-normalization averaging box too large for input array size
Abort
Some checks indicate that coherence is 0 everywhere, any thoughts @ZahraDabiri?
When doing the unwrapping, with a single tile, Snaphu fails with the following:
Working on a subset inlands works good. cc @bro076