I'm not sure I quite understand: it is possible to "split" the original HDF
into separate files and then run otbcli_BandMath on each output. That works
fine, but I'm trying to operate directly on individual "bands" (subdatasets
in HDF parlance) without needing that intermediary step.
Input.hdf has 17 subdatasets ("bands"), with "mask" being the name of the
17th subdataset.
*Is there a way to run otbcli_BandMath on a specific subdataset within a
HDF file without having to extract the subdataset first?*
I've since discovered that I can do what I need using band math in GDAL by
referencing individual subdatasets within the HDF file, but I thought OTB
would work as well.
Hopefully that's a bit clearer than mud this time :)
Merci!
On Saturday, May 31, 2014 5:57:16 AM UTC-4, Jonathan Guinet wrote:
>
> Hi
>
> could it be possible to try a split image application with your HDF as
> input in order to investigate a mis understanding with multiband HDF ?
>
>
> cheers,
>
> Jonathan
>
>
>
> 2014-05-29 20:38 GMT+02:00 dcd <[email protected] <javascript:>>:
>
>> Hi all,
>>
>> I've been trying to use otbcli_BandMath with a HDF file with 17
>> sub-datasets, but it appears I can only interact with the first band. On
>> that note, otbcli_ReadImageInfo only appears to acknowledge the existence
>> of a single band. Using gdalinfo, I am able correctly identifies all 17
>> layers of the HDF file). I can extract each subdataset using
>> gdal_translate, and then use otbcli_BandMath, but I would prefer to stay
>> within OTB if at all possible.
>>
>> My questions: are HDF files with multiple subdatasets supported in
>> otbcli_BandMath? If so, what is the correct syntax for working with
>> subdatasets within a HDF file using otbcli_BandMath?
>>
>> I've tried the following:
>>
>> $ otbcli_BandMath -il input.hdf -out output.hdf -exp "im1b17+1"
>>
>>
>> and
>>
>> $ otbcli_BandMath -il HDF4_EOS:EOS_GRID:"input.hdf":Grid:mask -out
>> output.hdf -exp "im1b1+1"
>>
>> Neither of the above examples work, although the first example will if
>> set to "im1b1", but then this only works on the first subdataset within
>> the HDF file (i.e., "band 1")
>>
>> Cheers,
>>
>> PS-loving the new OTB 4...great work!
>>
>> Dennis
>>
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