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2_dem_generation no 'getMetadataRoot()' attribute #46

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@vdevauxchupin

Hello,

I am discovering your pipeline as I would like to generate DEMs for a glacier in Alaska. I tried different AOIs, different times and sizes, and I am always blocked at the same step: generating the DEMs with 2_dem_generation.py.

The script encounters the following error:

Traceback (most recent call last):
  File "/scripts/2_dem_generation.py", line 941, in <module>
    subset_buffer=args.aoi_buffer
  File "/scripts/2_dem_generation.py", line 683, in run_P1_interferogram
    pass_metadata_p1 = product_1.getMetadataRoot() \
AttributeError: 'NoneType' object has no attribute 'getMetadataRoot'

I traced it back to SNAP, and concluded that it could come from bad images, but even after changing AOI and time-window I still got the same issue. Depending on which AOI or which time-window I use, I get between 2 and 10 .zip images.

Have you encountered that issue before ? If not, could you recommend an area that you know that works well with the code ?

Thank you !

ps: it's awesome to see people finally creating a pipeline for SAR DEM generation !!

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