HDF5 Identify does not handle files with user data at the beginning
|Reported by:||rprinceley||Owned by:||warmerdam|
In an HDF5 file, the superblock need not start at beginning, we are required to search for it at specific offsets. HDF5Dataset::Identify should probably use H5Fis_hdf5 function to identify an HDF rather than look for the signature in poOpenInfo->pabyHeader.
We have some NOAA data that does not work with GDAL because the superblock starts at 1024 (prefixed with XML).