[netcdf-java] grib2

• To: netcdf-java@xxxxxxxxxxxxxxxx
• Subject: [netcdf-java] grib2
• From: Annie Burgess <anniebryant@xxxxxxxxx>
• Date: Wed, 23 Jul 2014 15:06:23 -0800

Greetings all,

I am trying to create a script that will mimic the output of NCDump.  I
have successfully done this for NetCDF files, and now I am trying to apply
it to grib2 files.  I am using the NetCDF-java library in conjunction with
Apache Tika to do this.  Other posts have indicated I should be able to
open my grib2 files, just as if they were .nc files.  However, I continue
to get the following error:

"Caused by: java.io.IOException: Cant read gdas1.forecmwf.2014062612.grib2:
not a valid CDM file."

To open the .nc files, this is the bit of code I use (with the exception of
changing the .nc file to a .grib2 file):

String name = "gdas1.forecmwf.2014062612.grib2";

if (name == null) {
            name = "";
        }

        try  NetcdfFile ncFile = NetcdfFile.openInMemory(name,
os.toByteArray());
            // first parse out the set of global attributes
            for (Attribute attr : ncFile.getGlobalAttributes()) {
                Property property = resolveMetadataKey(attr.getName());
                if (attr.getDataType().isString()) {
                   metadata.add(property, attr.getStringValue());
                } else if (attr.getDataType().isNumeric()) {
                   int value = attr.getNumericValue().intValue();
                    metadata.add(property, String.valueOf(value));
                }
            }

Also, I am using the netcdfAll-4.3.jar at the command line.  Does anyone
have any insight as to *why *I'd be getting the 'not a valid CDM' error.  I
have checked the file using the NetCDF (4.3) GUI and the file looks good.

Thank you for any insight you can give.

Annie

• Follow-Ups:
  • Re: [netcdf-java] grib2
    • From: Christian Ward-Garrison