it that case I think the option should be --keep-ovm-work-files with the default "false".
> Date: Wed, 8 May 2013 10:35:30 +0200
> From: ligfietser@online.nl
> To: mkgmap-dev@lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] overview2 branch -- sea not rendered at resolution 12
>
> Hi Gerd,
> Maybe it is better to remove them by default.
> Most people won't need those files.
>
> > I've implemented an option in r2594:
> > --remove-ovm-work-files
> > If overview-levels is used, mkgmap creates one additional file
> > with the prefix ovm_ for each map (*.img) file.
> > These files are used to create the overview map.
> > With option --remove-ovm-work-files=true the files are removed
> > after the overview map was created. The default is to keep the files.
> >
> > Gerd
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