[mkgmap-dev] Minimum resolution in polygons style

Wed Dec 21 07:48:55 GMT 2016

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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