[mkgmap-dev] Overview map for Africa

Thu Mar 28 10:12:27 GMT 2013

Hi WanMil,

yes, this could be useful for some kind of a precompiled overview map. 
I'd like to collect some input first, but I think a nice overview map could contain 
large cities, level 2 boundaries, coastlines, and maybe also large rivers.

I don't know if this collection of data is already available for download somewhere?

Ciao,
Gerd

> Date: Wed, 27 Mar 2013 13:26:01 +0100
> From: wmgcnfg at web.de
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] Overview map for Africa
> 
> I think the precompiled sea will be able to provide special polygons for 
> the overview map. Jochen Topf provides simplified shapes on the page 
> openstreetmapdata.com. It should be easy to use them for the overview map.
> 
> WanMil
> 
> > Thanks Gerd!
> > I already made a "quick and dirty"test with Nick's suggestion to use an mp image file.
> > See https://dl.dropbox.com/u/64716698/OSM/mkgmap/overview1.jpg and
> > https://dl.dropbox.com/u/64716698/OSM/mkgmap/overview2.jpg
> >
> > To make this overview map, I filtered the Germany extract from everything except admin_level=2 and place=city & population>300.000
> > I ran mkgmap with precomp-sea and just only one level (13). With gpsmapedit I merged the resulting img with an already made overview map of a Germany test map (just a few tiles in the corners). Saved the merged map as mp file and converted back to img with mkgmap.
> > I used this map for the overview img. The result is that if you zoom all the way out, you see overview1.jpg, not a blank map anymore but a normal one with borders, view cities and sea. If you zoom in, the normal map appears (except where there are no tiles, then you see the overview map underneath).
> >
> > I'll try your patched version later and let you know the results. Should be another big improvement of mkgmap!
> >
> >
> >
> > Gerd wrote:
> >> I think I managed to migrate the changes in the overview branch into
> >> the
> >> current
> >> trunk version.
> >> Attached is the patch, the compiled binary is available here:
> >> http://files.mkgmap.org.uk/download/95/mkgmap.jar
> >>
> >> overview_v1.patch
> >> <http://gis.19327.n5.nabble.com/file/n5754899/overview_v1.patch>
> >>
> >> I have added two options:
> >> --x-overview-add-lines
> >> --x-overview-add-polygons
> >> If you add both, you get the result as with the branch version. If
> >> prefer
> >> adding only the polygons
> >> to see the shape of the continent.
> >>
> >> By the way, the full img file for Africa has ~ 1.3 Mb.
> >>
> >> So, feel free to play with it and suggest changes.
> >>
> >> Gerd
> > _______________________________________________
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> > mkgmap-dev at lists.mkgmap.org.uk
> > http://lists.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >
> 
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