[mkgmap-dev] mkgmap ToDo list

Tue Apr 29 14:32:38 BST 2014

Num-tiles=x would indeed be better for this specific need.

It is my experience that it regularly takes multiple calls to Splitter 
to get 2+ sub-tiles when you reduce the max-nodes by 100k for each 
sub-split attempt. This is what I currently do to get an optimum in 
tile-size vs total number of tiles.

On 29/04/2014 15:09, Gerd Petermann wrote:
> Hi Lambertus,
>
> that sounds like a possible change in splitter:
> Instead of specifying max-nodes you may specify --num-tiles=x
> and splitter will try to find a split that produces excactly x tiles
> which are not too narrow and have a node number which is not
> too far from the average (but still aligned to a multiple of map units
> as now).
> So, for your script that means you don't have to find the max-nodes
> value.
>
> I'll think about this again...
>
> Gerd
>
>  > Date: Tue, 29 Apr 2014 14:59:36 +0200
>  > From: osm at na1400.info
>  > To: mkgmap-dev at lists.mkgmap.org.uk
>  > Subject: Re: [mkgmap-dev] mkgmap ToDo list
>  >
>  > While this possibly can be solved in Splitter or Mkgmap, it could also
>  > be solved by your build-script when you add a maximum tile size check
>  > and re-split (with a lower number of max-nodes) until you get two or
>  > more sub-tiles. Granted, this adds complexity to the script but it works
>  > well for me.
>  >
>  > On 25/04/2014 21:54, Henning Scholland wrote:
>  > > Hi Gerd,
>  > >
>  > > I would like to have img-tiles which have globally nearly the same
>  > > filesize, so that they use the space of devices like eTrex 10.
>  > >
>  > > With my actual map I use globally the same value for max-nodes. But the
>  > > size of the img-tiles differ more then factor 2. Eg. a tile in Germany
>  > > is between 2 and 5 mb where a tile in China is about 10 mb. If I remove
>  > > details, this difference will increase, because in Germany more objects
>  > > will be removed from the img-tile then in China.
>  > >
>  > > Henning
>  > >
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