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Charles: Since the current Java netcdf library "understands" GRIB2, and if your desired application is in Java, you might consider using the Netcdf Tools (link in the Java NetCDF page, as well as tutorial for NCML which is a "must read" before doing down this path) to create some NCML that would allow you to effectively change the names/units/etc. If you then aim your application at the .ncml file, it's just like reading from the .nc file except you get all the "new" meta data. Click on the "NCML" tab in the toosui.jar file, and first point it at your original .nc file. Edit the variables (check the tutorial about assigning new names) and then when you're done, save it (as an .ncml file). I've used this a lot to "restructure" netcdf files that were not in CF compliant form. I have also encountered some very obtuse hdf5 files that could not be munged into anything usable, however. tom On 3/30/07, Ross,Charles H - PGPW-5 <cxross@xxxxxxx> wrote:
Hello all, I hope this isn't a remedial question but I'm not a java expert and I'm stumped. I have a grib2 file (a GFS212 40KM grid). I have no problem converting it into a netcdf file using the following command: java -Xmx512m ucar.nc2.iosp.grib.Grib2Netcdf 2007033006_gfs_40.grib 20070330_0600_in.nc I do not like how this file is parameterized (both variable names and units) and would like to change this. I see all the different tab files available in the resources/grib/tables/ directory. How would I go about using another tab file (or one of my own) instead of what is default by using the above command? I have no problems using parameter tables using "gribtonc" (with grib1 files) with the –g option. But this has me guessing. Thanks as always for any help!! -Charles Charles Ross Meteorologist Bonneville Power Administration 905 NE 11th Ave. Portland , OR 97232 503-230-3159
-- Tom Whittaker University of Wisconsin-Madison Space Science & Engineering Center (SSEC) Cooperative Institute for Meteorological Satellite Studies (CIMSS) 1225 W. Dayton Street Madison, WI 53706 USA ph: +1 608 262 2759
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