[gdal-dev] Removing in-file overviews

[Michael Aschenbeck]

Hello GDAL developers,

For my application I need to create an *.ovr file, and it usually works
using BuildOverviews.

However, when I call BuildOverviews via C++ on a certain dataset, nothing
happens because the overview is already included in the file.  Is it
possible to delete the in-file overview or move it to an *.ovr file using
the C++ API?

Thanks,
Mike
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