Hi again, My mistake - this is not an HDF file at all, but rather netCDF rev 2.3.2 (?) which is before the change to using HDF5 structure. I'm assuming HDFView includes a library that opens netCDF files in the old format which is why it can be opened there and not by libhdf5/tools.
Makes total sense, the mistake was assuming that the file was in netCDF4 without checking. Cheers, Martijn On 9 November 2017 at 14:54, Martijn Jasperse <m.jaspe...@gmail.com> wrote: > Hi All, > I've been sent a CDF file from a user which was generated by some vendor > application, which appears to open correctly in HDFView but does not open > at all in libhdf5 or associated tools (h5ls, h5dump, etc). My understanding > is that this version of CDF is an H5 with particular structure so this > "should" be possible. > > It seems to me the file is corrupted somehow, but I'm curious as to how > HDFView can extract some data from the file when libhdf5-based programs > can't even open it. Corruption is evident if you attempt to open a char > dataset, but the user wants to be able to extract particular datasets which > are viewable correctly in HDFView. > > I'm using HDFView 3.0.0 and h5ls/h5dump from the v1.10.1 distro (Windows > 10), which both return "unable to open file". The example file is at > https://drive.google.com/open?id=1_ABK-XnVU2Tw7fuOhNmPqc9ZoY7xqdEy > > The logic out there seems to be that "if HDFView can open it, it's a valid > HDF file" and therefore any HDF application should be able to process it - > or at least that there must be some way to extract the data. > > Thanks for any assistance. > > Cheers, > Martijn > >
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