Monteverdi overview generation widget: compression GUI as no effect on the pyramid setings
I want to generate overview from Global Surface Water tile mask which are 40000*40000 pixels encoded in Byte with 'LZW' compression.
In the case of a water mask tile, using monteverdi the output ovr is 500Mo, with gdaladdo it's 12M. I think that the compression config widget in monteverdi does not transfer the option properly to gdal.
Steps to reproduce
Open a large image in Monteverdi and in the Configuration widget of the multi-resolution pyramid selects Compression 'LZW' for instance (the default value is None).
After the overview generation is over, do a gdalinfo on the ovr file, you'll see that the LZW compression is not listed in the Image Metadata Structure.
Note also that the expected size on disk of the pyramid is not updated if the compression mode is modify in the GUI (I agree that it is hard or impossible to estimate this size). We should perhaps add in the GUI that it is the expected size without compression.
OS, OTB version or tag, information related to build (binaries, superbuild, system libs ...)