Problems with a few files from SRTM1

Hi,

we ran into a new problem with SRTM1 files: some 'downloaded' files do not contain a valid geotiff file but are json files that look like the answer from the download service.

The json files contain:


{"errorMessage":"Invalid scene or product","isPending":false,"url":null}```

And the exception thrown on maps containing problematic tiles look like:
```N46E050: using file ./hgt/SRTM1v3.0/N46E050.tif.
  File "/home/xxx/miniconda3/bin/pyhgtmap", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/main.py", line 67, in main
    main_internal(sys.argv[1:])
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/main.py", line 59, in main_internal
    HgtFilesProcessor(opts.nJobs, opts.startId, opts.startWayId, opts).process_files(
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/hgt/processor.py", line 291, in process_files
    self.try_parallelizing(self.process_file, file_name, check_poly)
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/hgt/processor.py", line 221, in try_parallelizing
    func(*args, **kwargs)
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/hgt/processor.py", line 232, in process_file
    hgt_file = HgtFile(
               ^^^^^^^^
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/hgt/file.py", line 425, in __init__
    self.init_as_geotiff(
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/pyhgtmap/hgt/file.py", line 518, in init_as_geotiff
    g: gdal.Dataset = gdal.Open(self.fullFilename)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/xxx/miniconda3/lib/python3.12/site-packages/osgeo/gdal.py", line 4716, in Open
    return _gdal.Open(*args)
           ^^^^^^^^^^^^^^^^^
RuntimeError: `./hgt/SRTM1v3.0/N44E048.tif' not recognized as a supported file format.```

Problematic Tiles I've identified so far (for you to test) are:
- N38E050.tif: JSON data
- N38E051.tif: JSON data
- N39E050.tif: JSON data
- N39E051.tif: JSON data
- N41E050.tif: JSON data
- N42E049.tif: JSON data 
- N43E048.tif: JSON data
- N44E048.tif: JSON data
- N44E049.tif: JSON data
- N50E015.tif: JSON data

If you use the following poly file to build the srtm1 contour data you can also reproduce it:
https://download.geofabrik.de/asia/azerbaijan.poly

N42E049.tif is the tile that throws the exception on Azerbaijan.

If you need more information, just let me know. Happy to help and run additional tests.

Cheers Patrik

agrenott / pyhgtmap

Problems with a few files from SRTM1 #56