[mkgmap-dev] question regarding MapRoad

Tue Mar 25 16:05:05 GMT 2014

Hi Andrzej,

> Do you still consider this idea?
> 
> I have experimenting a bit with MAX_DIVISION_SIZE in mkgmap. I have 
> observed increase in file size, when using small value, but no increase 
> in processing speed. I think this discussion gives some explanations. As 
> I understand, mkgmap doesn't split map objects to fit subdivisions. So 
> there is no gain from using smaller subdivisions, because there is no 
> reduction in processed objects size.

Tried the same with the same result some time ago.

> 
> I would expect that proper truncating objects to subdivisions could be 
> another big improvement for mkgmap. Please, don't abandon this idea.
I agree, but it requires a redesign of the MapSplit algo, which is complex.
I don't want to start complex changes before autumn, but if anybody else
wants to start, that would be great.

Gerd

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