[Geoserver-users] Grib files with more than 32 bands?

GeoServer GeoServer User
1

I am having trouble displaying Grib files with more than 32 bands. I can
configure a coverage store, however configuring layers afterwards fails.

The stacktrace finishes with this:

...
Caused by: ucar.ma2.InvalidRangeException: Illegal Range for dimension 1:
last requested 32 > max 0
  at ucar.ma2.Section.fill(Section.java:179)
  at ucar.nc2.Variable.read(Variable.java:709)
  at
org.geotools.imageio.netcdf.NetCDFImageReader.readSection(NetCDFImageReader.java:919)
  ... 137 more

If I subset the same file with 32 bands (using cdo), my Grib file works as
expected.
./cdo -seltimestep,1/32 ~/ds.rhm.bin ~/ds.rhm.bin.grb

This is a link to the original file in question.
https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.conus/VP.001-003/ds.rhm.bin

Thank you for any thoughts on this, I was hoping to keep the data original.

Alex

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2

If a multidimensional file has more than 32 bands, the index in getImageIndex
in GeoSpatialImageReader.java is returned like this:
[32 33 34 ... n 0 1 2 3 ... 31]

Sorting the index prior to returning it fixes the InvalidRangeException
error:

  public List<Integer> getImageIndex(Query filterQuery) throws IOException {
        List<CoverageSlice> descs = slicesCatalog.getGranules(filterQuery);
        List<Integer> indexes = new ArrayList<Integer>();
        for (CoverageSlice desc : descs) {
            Integer index =
                    (Integer)
desc.getOriginator().getAttribute(CoverageSlice.Attributes.INDEX);
            indexes.add(index);
        }
        *Collections.sort(indexes);*
        return indexes;
    }

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3

Hi Alexander,
thanks for reporting that.
Do you have any chance to open a JIRA and contribute your patch as a PR with a test?

Regards,
Daniele

On Tue, Jul 9, 2019 at 3:46 PM alexander-petkov <greenkov@anonymised.com> wrote:

If a multidimensional file has more than 32 bands, the index in getImageIndex
in GeoSpatialImageReader.java is returned like this:
[32 33 34 … n 0 1 2 3 … 31]

Sorting the index prior to returning it fixes the InvalidRangeException
error:

public List getImageIndex(Query filterQuery) throws IOException {
List descs = slicesCatalog.getGranules(filterQuery);
List indexes = new ArrayList();
for (CoverageSlice desc : descs) {
Integer index =
(Integer)
desc.getOriginator().getAttribute(CoverageSlice.Attributes.INDEX);
indexes.add(index);
}
Collections.sort(indexes);
return indexes;
}

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Regards,
Daniele Romagnoli

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4

Ciao Daniele:

Thanks for replying, I will do that today.

Kind regards,
Alex

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