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[netCDF #AZT-127023]: Can't ncdump a file...

Tom,

> First of all, the NetCDF-3 library should not be able to recognize a
> NetCDF-4 (HDF5) file right?   If that's correct maybe we just need
> to update our v4 libraries.

Yes, you need an ncdump compiled against the netCDF-4 library to recognize 
netCDF-4 files.

--Russ

> Unidata netCDF Support wrote:
> > Hi Tom,
> >
> >
> >> We have a NetCDF file which ncdump fails to recognize as a
> >> valid file.  I can open the file with the java-netcdf library using
> >> toolsUI-4.0.jar.  I'm not sure if this is a v3/4 or 32/64bit
> >> compatibility problem.  We found that neither NetCDF-3 or 4
> >> will ncdump this file:
> >>
> >> ftp.ssec.wisc.edu/pub/incoming/MSG_SEVIRI_2008157_1200_AWG_SST.nc
> >> TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION.nc
> >>
> >
> > You've provided 2 file names, so I'm not sur which one is causing
> > ncdump problems.
> >
> > I downloaded the first one and ncdump seems to recognize it as a
> > netCDF-4 problem and read the metadata just fine:
> >
> >  $ ls -l MSG_SEVIRI_2008157_1200_AWG_SST.nc
> >  -rw-r--r--   1 russ     ustaff   220481910 Jul  1 09:16 
> > MSG_SEVIRI_2008157_1200_AWG_SST.nc
> >  $ ncdump -k MSG_SEVIRI_2008157_1200_AWG_SST.nc
> >  netCDF-4
> >  $ ncdump -h MSG_SEVIRI_2008157_1200_AWG_SST.nc
> >  netcdf MSG_SEVIRI_2008157_1200_AWG_SST {
> >  dimensions:
> >      Columns = 3712 ;
> >      Rows = 3712 ;
> >  variables:
> >      float Latitude(Columns, Rows) ;
> >              Latitude:long_name = "Latitude" ;
> >              Latitude:units = "degrees" ;
> >              Latitude:comments = "Pixel latitude (degree)" ;
> >      float Longitude(Columns, Rows) ;
> >              Longitude:long_name = "Longitude" ;
> >              Longitude:units = "degrees" ;
> >              Longitude:comments = "Pixel Longitude (degree)" ;
> >      float SST_Regression(Columns, Rows) ;
> >              SST_Regression:Units = "K" ;
> >              SST_Regression:Comments = "Sea Surface Temperature (SST) 
> > derived from SEVIRI BTs using regression technique" ;
> >              SST_Regression:long_name = "sst regression" ;
> >              SST_Regression:_FillValue = -999.999f ;
> >              SST_Regression:missing_value = -999.999f ;
> >      float SST_Physical(Columns, Rows) ;
> >              SST_Physical:Units = "K" ;
> >              SST_Physical:Comments = "Sea Surface Temperature (SST) derived 
> > from SEVIRI BTs using inversion (physical) method" ;
> >              SST_Physical:long_name = "sst physical" ;
> >              SST_Physical:_FillValue = -999.999f ;
> >              SST_Physical:missing_value = -999.999f ;
> >              SST_Physical:valid_range = 0.f, 400.f ;
> >
> >  // global attributes:
> >              :Conventions = "CF-1.4" ;
> >              :Title = "AIT SST Product" ;
> >              :Source = "AIT_Framework" ;
> >  }
> >
> > Similarly for the second file, I can't duplicate the problem you are
> > seeing:
> >
> >  $ ls -l TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION.nc
> >  -rw-r--r--   1 russ     ustaff   27503920 Jul  1 09:25 
> > TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION.nc
> >  you have mail in /var/mail/russ
> >  $ ncdump -k TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION.nc
> >  netCDF-4
> >  $ ncdump -h TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION.nc
> >  netcdf TERRA_MODIS_2005155_3257_AWG_AEROSOL_DETECTION {
> >  dimensions:
> >      Columns = 1354 ;
> >      Rows = 2030 ;
> >  variables:
> >      float Latitude(Columns, Rows) ;
> >              Latitude:long_name = "Latitude" ;
> >              Latitude:units = "degrees" ;
> >              Latitude:comments = "Pixel latitude (degree)" ;
> >      float Longitude(Columns, Rows) ;
> >              Longitude:long_name = "Longitude" ;
> >              Longitude:units = "degrees" ;
> >              Longitude:comments = "Pixel Longitude (degree)" ;
> >      byte Smoke(Columns, Rows) ;
> >      byte Dust(Columns, Rows) ;
> >  }
> >
> > I'm using the latest ncdump from our snapshot release, but I don't
> > think that's relevant here, unless you've identified a bug in an
> > older version of ncdump we don't know about.
> >
> > What's the ncdump version (check the last line of the output from
> > ncdump --version)?
> >
> > --Russ
> >
> > Russ Rew                                         UCAR Unidata Program
> > address@hidden                     http://www.unidata.ucar.edu
> >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: AZT-127023
> > Department: Support netCDF
> > Priority: Normal
> > Status: Closed
> >
> >
> 
> 

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: AZT-127023
Department: Support netCDF
Priority: Normal
Status: Closed