[mkgmap-dev] Minimum resolution in polygons style

Wed Dec 21 12:23:17 GMT 2016

Seems like a good idea - It should use the --polygon-size-limits option
in an inverted sort of way.

Ticker

On Wed, 2016-12-21 at 07:48 +0000, Gerd Petermann wrote:
> Hi all,
> 
> while debugging the problem reported by Arndt Röhrig
> http://www.mkgmap.org.uk/pipermail/mkgmap-dev/2016q4/025471.html
> 
> I noticed that his style adds all polygons with "min resolution 10"
> like this:
> landuse=basin [0x53 resolution 10]
> 
> Up to now I thought this is just causing more CPU load : 
> The polygon is processed for each (low) resolution  and after many
> calculations it is typically "thrown away" because it 
> is reduced to a single point in the 
> 
> I think we can easily change mkgmap to calculate a proper "min res"
> value
> for shapes depending on the actual size at resolution 24. 
> Probably that would also be useful for lines.
> 
> Any thoughts?
> 
> Gerd
> 
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