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Re: Problem with GRIB files

Many thanks John.

I did the changes and came across a "new problem." Actually, after getting
the data, I have to convert the array to 1D:

        Array arr = vari.read();
        float[] data = (float[])arr.copyTo1DJavaArray();

The problem is that the copyTo1DJavaArray() is not working. I successfully tried
with NetCDF files though.

Cheers,

Adit


Quoting John Caron <address@hidden>:

> I am resending the code below, without the '*'
> 
> John Caron wrote:
> 
> > Adityarajsingh Santokhee wrote:
> >
> >> Hello,
> >>
> >> I have a few questions concerning reading GRIB files using the netcdf2.2
> >> library:
> >>
> >> 1. are there any problems when using the grib.jar library with 
> >> jakarta tomcat
> >> server ? Netcdf files can be correctly read and data extracted. Grib 
> >> files can
> >> be opened only but it is failing each time i wish to extract data 
> >> (all data as
> >> well as section of it).
> >>  
> >>
> >
> > most likely problem is you dont have write permission in the data 
> > directories, since we need to write an index file.
> > however, on failure  it should have defaulted over to writing in a 
> > temporary directory. probably theres no home directory for the tomcat 
> > user.
> > If you cant fix those 2 problems, set the directory to something that 
> > the tomcat user has write privilege in, using:
> >
> > ucar.nc2.util.FileCache.setRootDirectory()
> >
> >
> >
> >> 2. Are there any easier ways to reading data for a particular 
> >> variable using its
> >> internal name instead of the variable name. Currently, I have to get 
> >> list of
> >> all variables and then for each variable get its attributes and 
> >> thereafter
> >> check the attribute name for GRIB_param_number.
> >>  
> >>
> > I would make a HashMap
> >
> > HashMap gribHashMap = new HashMap();
> > for (int i=0; i<myVarList.size(); i++) {
> >  Variable myVar = (Variable) myVarList.get(i);
> >  String gribName = ncfile.findAttValueIgnoreCase(myVar, 
> > "GRIB_param_number", null);
> >  if (gribName != null)
> >    gribHashMap.put( gribName, myVar);
> > }
> >
> > Then look it up via
> >  
> > Variable myVar = (Variable) gribHashMap.get( gribName);
> > if ( myVar != null) {
> >  do_something();
> > }
> >
> >
> >
> 
> 
> 


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 Adityarajsingh Santokhee         Tel: +44 118 378 5213 (direct line)
 eScience Data Manager            Tel: +44 118 378 8741 (ESSC)
 Reading e-Science Centre         Fax: +44 118 378 6413
 ESSC                             Email: address@hidden
 University of Reading
 3 Earley Gate
 Reading RG6 6AL, UK

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