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
> >>
> >>
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> >
> >
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> >
>
