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[netCDFJava #MAO-189374]: Reading HDF5 files containing 'hdf5 external

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  • Subject: [netCDFJava #MAO-189374]: Reading HDF5 files containing 'hdf5 external
  • Date: Mon, 23 Feb 2009 08:48:13 -0700
Hi Didier:

Thanks, we are evaluating the feasibility of supporting this feature. Im
wondering how you intend to use this? I see that the hdf5 file contains nothing
but the link to the netcdf4 file.

Also, in terms of CF conformance, I would recommend that you put the attribute
alt:positive = "up" on the alt variable, per section 4.3:

"For this reason the attribute positive as defined in the COARDS standard is
required if the vertical axis units are not a valid unit of pressure"


> Hi,
>
> I send you some files as example :
>
> - JA2_IPR_2PcP021_001_20090126_085038_20090126_094651.nc is the file that
contains data. It's a netcdf 4 file format (it could also be a HDF5 file
format),
>
> - extlink_source.h5 is the hdf5 file that contains a reference (external
link) to JA2_IPR_2PcP021_001_20090126_085038_20090126_094651.nc file.
>
> - dump.log is the result of a h5dump (-H) of the extlink_source.h5 file.
>
> extlink_source.h5 file has been created with C API of the hdf5 1.8.2
library.
>
> Thanks,
>
> Didier.
>
> -----Message d'origine-----
> De: Unidata netCDF Java Support [mailto:address@hidden]
> Envoy: vendredi 20 fvrier 2009 17:43
> : didier earith
> Objet: [netCDFJava #MAO-189374]: Reading HDF5 files containing 'hdf5 external
links '
>
> Im sorry Didier, we dont support "external links". If you send me the files,
I will evaluate if we can add that feature in the future.
>
> > Full Name: Didier Earith
> > Email Address: address@hidden
> > Organization: CLS
> > Package Version: 4.0.34
> > Operating System:
> > Hardware:
> > Description of problem: Hi,
> >
> > I'm try to use Netcdf-java to read HDF5 files with 'HDF5 external
> > links'.
> >
> > I'm using Netcdf-java 4.0.34.
> >
> > It seems that Netcdf-Java can't read data which are declared as
> > 'external link' in the HDF5 files.
> >
> > When reading the HDF5 file, I get no errors, but there no variable are
> > found.
> >
> > If I dump the HDF5 file with h5dump all is fine.
> >
> > Is it possible to use Netcdf-java library to read HDF5 files containing
> > 'HDF5 external links' ?
> >
> > Thanks.
> >
> > Didier.
> >
> >
>
>
> Ticket Details
> ===================
> Ticket ID: MAO-189374
> Department: Support netCDF Java
> Priority: Normal
> Status: Open
>
>
>
> Cliquez sur l'url suivante
>
https://www.mailcontrol.com/sr/ZLTfjrpxYGXTndxI!oX7UoWpENiwadNGkUjoCoATthjAy59twyYb95UxruDQLd2!kpERGUhe2VHC8dmstCo9uQ==
> si ce message est indsirable (pourriel).
>


Ticket Details
===================
Ticket ID: MAO-189374
Department: Support netCDF Java
Priority: Normal
Status: Open