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Re: BUFR variables with shape > 1

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  • Subject: Re: BUFR variables with shape > 1
  • Date: Thu, 10 Aug 2006 15:50:22 -0600 (MDT)
On Tue, 8 Aug 2006, Kevin Baggett wrote:

> Robb,
> I am using some of your classes (BufrDataExtractor in particular) to get
> out some data for files I have.
> Some of the data has a shape of, say, 2, but when I use the
> getFloatData, it returns the first dimension all at once and then the
> second dimension.
> When I use the NetCDF GUI, it prints out alternating values from each
> dimension.
> Where in the code is this alternating value approach accomplished?

Kevin,

interpreting  compressed data is a much more difficult task then uncompressed.
compressed data is a different animal, all the values for the fields are
grouped together. to get one obs, you have to read the values using a
stride of numObs. the code is in BufrIosp.java, readDataCompressed, line
532

                  } else if( bd.isNumeric() ) {
                      ii = (IndexIterator)iiHash.get( v.getShortName() );
                      float[] bufrdata = bd.getFloatData();
                      //System.out.println( "bufrdata.length ="+
bufrdata.length
                      //+" = "+ numObs );
                      for( int m = 0; m < numObs && m != end; m++ ) {
                         for( int n = m; n < bufrdata.length; n += numObs
) {
                            ii.setFloatNext( bufrdata[n] );
                         }
                      }



the global attribute in the index; compressdata = true determines how the
read will happen.

robb...








> Does it have something to do with Array and IndexIterator?
> Thanks!
> Kevin
>

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================