[gdal-dev] modifying HDF4 subdatasets

[Frank Warmerdam]

Andrea Battisti wrote:
> Hi all,
> 
> 
> is it possible to modify existing HDF4 subdatasets using the GDAL/HDF4
> driver ?
> 
> 
> I see that the HDF4 driver should support the creation from scratch, but
> given a HDF4 file containing a set of subdatasets, would it be possible
> to open one of the subdatasets, (over)writing to it using RasterIO() ?
> 
> If not, what is the correct way to modify the content of a sub-dataset?

Andrea,

GDAL currently only supports writing to the non-HDFEOS dataset type
it creates itself (I think "SDS" datasets).

I haven't tested update in place, but based on a brief review of the
code it seems it ought to work in simple cases.

Best regards,
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