[gdal-dev] GDAL, HDF4 and MODIS L1B data

[Hernán De Angelis]

Thank you for your response, Jukka.

That is interesting. I set cmake to build hdf4, cmake sees it and it 
does not throw errors during the build. In fact, I see:

[ 38%] Built target gdal_HDF4

but the command you gave gives not HDF4

gdalinfo --format hdf4

(should be "formats" instead?)
gdalinfo --formats hdf4

this retrieves a long list, but no HDF5:

gdalinfo --formats | grep hdf
   HDF5 -raster,multidimensional raster- (rovs): Hierarchical Data 
Format Release 5 (*.h5, *.hdf5)

on the other hand
gdal-config --formats

gives:

gdal-config --formats
MEM vrt HDF4 MEM

So it should be there?

This is confusing. Will keep looking.

Thank you for your time, Jukka!

Hernán


Den 2024-11-11 kl. 12:45, skrev Rahkonen Jukka:
>
> Hi,
>
> Have you checked with gdalinfo if you have managed to build the HDF4 
> driver?
>
> gdalinfo --format hdf4
>
> Your test file opens for me with GDAL from OSGeo4W.
>
> -Jukka Rahkonen-
>
> *Lähettäjä:* gdal-dev <gdal-dev-bounces at lists.osgeo.org> *Puolesta 
> *Hernán De Angelis via gdal-dev
> *Lähetetty:* maanantai 11. marraskuuta 2024 13.37
> *Vastaanottaja:* gdal-dev at lists.osgeo.org
> *Aihe:* [gdal-dev] GDAL, HDF4 and MODIS L1B data
>
> I recently compiled a minimal GDAL (3.10) with HDF4 support (using HDF 
> 4.3.0) for processing MODIS L1B data. However, the resulting command 
> line tools cannot understand the format. Perhaps I am doing something 
> wrong, or missing something important, or both.
>
> Do I understand correctly that MODIS L1B in HDF-EOS format should be 
> readable by GDAL compiled with HDF4 support without additional libraries?
>
> Thanks for any hint.
>
> Hernán
>
>
>
> Workflow:
>
> Build HDF4 (4.3.0)
>
> ./configure --prefix=/home/hernan/project --disable-netcdf 
> --disable-fortran --enable-shared --disable-static
> make
> make install
>
>
> Build GDAL (3.10) with HDF4 support
> ccmake , make, ... etc
>
> /home/hernan/project/bin/gdal-config --formats
> MEM vrt HDF4 MEM
>
>
>
> Test
>
> /home/hernan/project/bin/gdalinfo 
> MOD02QKM.A2024307.1325.061.2024308012941.hdf
> ERROR 4: `MOD02QKM.A2024307.1325.061.2024308012941.hdf' not recognized 
> as being in a supported file format.
> gdalinfo failed - unable to open 
> 'MOD02QKM.A2024307.1325.061.2024308012941.hdf'.
>
>
>
> Testdata if someone wants to try (warning: 150 Mb!):
> https://www.geonatura.se/lastkaj/index.php/s/TCS35pjANsEtSyV
>
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