[jira] [Created] (CLIMATE-501) data_source.local is unable to open RegCM data

["Michael Joyce (JIRA)" <ji...@apache.org>]

Michael Joyce created CLIMATE-501:
-------------------------------------

             Summary: data_source.local is unable to open RegCM data
                 Key: CLIMATE-501
                 URL: https://issues.apache.org/jira/browse/CLIMATE-501
             Project: Apache Open Climate Workbench
          Issue Type: Bug
          Components: data sources
    Affects Versions: 0.3-incubating
            Reporter: Michael Joyce
             Fix For: 0.5


Per the discussion on the mailing list, data_source.local is unable to open a RegCM file. It seems at first glance that it is failing to find the user supplied variable names even though I'm able to access the request variable through the netCDF4.Dataset object in the REPL.

Loading the attached example file with the following commands results in the error:

{code}
>>> local.load_file('/Users/mjjoyce/Downloads/RegCM_4-3_SampleOutput.nc', 'prmax')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "ocw/data_source/local.py", line 216, in load_file
    lat_name = _get_netcdf_variable_name(LAT_NAMES, netcdf, variable_name)
  File "ocw/data_source/local.py", line 93, in _get_netcdf_variable_name
    raise ValueError(error)
ValueError: Unable to locate a single matching variable name in NetCDF object. 
{code}

However, manually loading the dataset and attempting to access the same variable works file. Note that 'x' here is simply the path to the same file.

{code}
>>> y = netCDF4.Dataset(x)
>>> y.variables['prmax']
<netCDF4.Variable object at 0x104f6c3b0>
{code}



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