[mkgmap-dev] Optimizing MapSplitter

Thu Nov 13 14:09:39 GMT 2014

Hi,

I think I'll try to change this:
1) Put large objects (large bbox, maybe only few points as with 0x4b background polygon) 
into there own sub divs and don't add small objects to those sub divs
2) Create smaller sub divisions in dense areas

I don't know yet how to do that, so I'll sleep about about again ;-)

Gerd

> Date: Thu, 13 Nov 2014 13:20:42 +0100
> From: popej at poczta.onet.pl
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] Optimizing MapSplitter
> 
> Hi Gerd,
> 
> I test maps at my current location, which is near the center of Gdańsk, 
> so it is rather dense map here. This 50% difference was in redraw time 
> from nuvi menu "Dispaly Map" to fully rendered map. It was about 4 
> seconds for mkgmap and faster cgpsmapper and about 6 seconds for slower 
> version of cgpsmapper compilation.
> 
> Some more statistics:
> 29483017.img
> level 4: resolution 17, subdivisions    1
> level 3: resolution 18, subdivisions    7
> level 2: resolution 20, subdivisions   24
> level 1: resolution 22, subdivisions  173
> level 0: resolution 24, subdivisions  423
> 
> 29483018.img
> level 4: resolution 17, subdivisions    1
> level 3: resolution 18, subdivisions    7
> level 2: resolution 20, subdivisions   36
> level 1: resolution 22, subdivisions  429
> level 0: resolution 24, subdivisions 3979
> 
> 29483019.img
> level 4: resolution 17, subdivisions    1
> level 3: resolution 18, subdivisions    4
> level 2: resolution 20, subdivisions   35
> level 1: resolution 22, subdivisions  221
> level 0: resolution 24, subdivisions  367
> 
> -- 
> Best regards,
> Andrzej
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