Hi, There is a question about HDF4 in https://gis.stackexchange.com/questions/424204/convert-geotiff-to-hdf-using-gdal. I tried the same with GDAL 3.4.0. With a single band image conversion from GeoTIFF into HDF4Image succeeds but with a 3 band image not. I am not sure if it is even supposed to work and the driver test in https://github.com/OSGeo/gdal/blob/master/autotest/gcore/hdf4_write.py is rather simplistic. So, should "gdal_translate -of HDF4Image 3band.tif out3band.h4" work?
-Jukka Rahkonen-
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