Updates to improve compliance with the IOOS Compliance Checker (glide…

[jcermauwedu]

…rdac:3.0)

• Still need to ignore ancillary_variable recommendations or skip specific test
• ncprocess.py
  • profile_id: Max int32 type; attributes valid max and min also need to be same type; _FillValue = -999
  • platform: Max int32 type; _FillValue = -999
  • set time encoding to float to avoid UserWarnings about time conversion
• slocum.py
  • If import test fails for dbdreader, the flag should be False for have_dbdreader?
  • Need pandas to help avoid UserWarnings about time conversion; set encoding to float for time encoding
  • depth: valid min/max and _FillValue updates to match gliderdac:3.0
  • Other updates from char to float to match gliderdac:3.0
  • Obtain direct version of libnetcdf (borrow code from xarray)
• tests
  • Add README to discover location of example data

Other things that should be added/updated to respective deployment.yml files to improve compliance. Once that is done, things are squeaky clean.

$ compliance-checker -t gliderdac:3.0 -s check_ancillary_variables pyglider/L0-profiles/unit507-20240325T1507.nc
Running Compliance Checker on the datasets from: ['pyglider/L0-profiles/unit507-20240325T1507.nc']

--------------------------------------------------------------------------------
                         IOOS Compliance Checker Report
                                Version unknown
                     Report generated 2024-03-26T00:50:22Z
                                 gliderdac:3.0
      https://ioos.github.io/glider-dac/ngdac-netcdf-file-format-version-2
--------------------------------------------------------------------------------
All tests passed!