Hi,
I’m looking for a simple convention to represent SRS and Geotransform
information for HDF5 arrays. A fairly thorough reading of available HDF5
geospatial data representation specs hasn’t resulted in a satisfactory
solution. I know that HDF-EOS5 is a published spec but the unintuitive naming
of swaths and grids is not a satisfactory solution for what we are trying to
accomplish. We would like a spec that allows us to
1. Support complex datasets (possible since GDAL 2.3). HDF-EOS5 does not
support this.
2. Generate HDF5 files with different grids in the same file – one can think
of some grids as low resolution support grids which can be interpolated on the
fly to match the primary high resolution grids. This might be an issue for
CF-compliant representation? We might want support to include different grids
for different layers depending on support needed by interpolators.
I’ve also been looking through the netcdf driver in GDAL since this is closely
related to HDF5 and noticed that there is a non-CF compliant representation
that is still supported. I’m happy to work on implementing a similar solution
for HDF5 – namely each dataset gets its own spatial_ref (str) and GeoTransform
(array of floats/doubles) attributes.
I’m reaching out to see if similar/ alternate solutions have been proposed in
the past or if something similar is in the works. If not, would a PR for a
feature like this be of interest?
Thanks
Piyush
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