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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Hi again, Ok...so if I understood correctly...I should be able to get the data somehow right? Just asking because I'll need to know if I should stop right now or keep using NetCDF-Java (which I think is great, by the way) Regards, Alejandro On Thu, Jan 16, 2014 at 9:50 PM, John Caron <caron@xxxxxxxxxxxxxxxx> wrote: > Hi Alejandro : > > well, thats complicated. the short answer is that we map collections of > GRIB records to netcdf multidimensional arrays. > > you could read this as background: > > > http://www.unidata.ucar.edu/blogs/developer/en/entry/dataset_schemas_are_lost_in > > you can use lower level GRIB APIs, but we dont support or document them, > and you would have to read code to understand how to use them. > > download ToolsUI and use it to read your GRIB file so you get a sense of > it: > > > http://www.unidata.ucar.edu/software/thredds/v4.4/netcdf-java/documentation.htm > > Open in the Viewer tab; also open in IOSP/GRIB1(2)//GRIB1(2)Collection > which shows you the underlying GRIB recordss. > > > John > > On 1/16/2014 1:31 PM, Alejandro Villamarin wrote: > > Hello John, > > > > Thanks for your quick response. I'm a newbie with both GRIB and NetCDF, > > but I don't see a relationship between the NetcdfFile methods and the > > GRIB structure (so far, I'm reading this: > > http://www.wmo.int/pages/prog/www/DPS/FM92-GRIB2-11-2003.pdf). For > instance: > > > > String filename = "gfs_4_20140115_1200_192.grb2"; > > NetcdfFile ncfile = null; > > try { > > ncfile = NetcdfFile.open(filename); > > > > List<Dimension> dimensions = new ArrayList<Dimension>(); > > dimensions = ncfile.getDimensions(); > > Iterator<Dimension> iterator = dimensions.iterator(); > > while (iterator.hasNext()){ > > Dimension current = iterator.next(); > > current.toString(); > > } > > > > How are the dimensions mapped into the structure of a GRIB file? Same > > goes for the getVariables() method...thus, that's why I was asking for a > > full working example of parsing a GRIB file :) > > > > Regards, > > Alejandro > > > > > > On Thu, Jan 16, 2014 at 2:56 PM, John Caron <caron@xxxxxxxxxxxxxxxx > > <mailto:caron@xxxxxxxxxxxxxxxx>> wrote: > > > > Hi Alejandro: > > > > You just open a GRIB file like its a netcdf file and access it > > through the netCDF API. > > > > some tutorials are at: > > > > > http://www.unidata.ucar.edu/software/thredds/v4.4/netcdf-java/tutorial/index.html > > > > John > > > > > > On 1/16/2014 5:08 AM, Alejandro Villamarin wrote: > >> Hi there! > >> > >> I'm wondering if I can use NetCDF-Java library to parse GRIB2 > >> files. So far I'm able to open and display file contents from a > >> GRIB2 file, but I'm wondering if it is possible to actually parse > >> the file: go through the variables and get the values, basically. > >> If so...are there any examples? > >> > >> Kind regards, > >> Alejandro > >> > >> > >> _______________________________________________ > >> netcdf-java mailing list > >> netcdf-java@xxxxxxxxxxxxxxxx <mailto:netcdf-java@xxxxxxxxxxxxxxxx> > >> For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > > > > > > _______________________________________________ > > netcdf-java mailing list > > netcdf-java@xxxxxxxxxxxxxxxx <mailto:netcdf-java@xxxxxxxxxxxxxxxx> > > For list information or to unsubscribe, visit: > > http://www.unidata.ucar.edu/mailing_lists/ > > > > >
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