[mkgmap-dev] Include the following patches into trunk -- Patch1 - Drop small Polygons

Tue Mar 1 18:54:10 GMT 2011


Am 01.03.2011 19:44, schrieb Henning Scholland:
> Am 01.03.2011 19:38, schrieb Felix Hartmann:
>> On 01.03.2011 19:33, Felix Hartmann wrote:
>>> The following patches are in my eyes really worthwhile and should be
>>> added to trunk. They all work fine without glitches.
>>>
>>> 1. Drop small Polygons
>>> I am not sure who wrote this patch, but I have been using it longtime
>>> and it certainly does improve map performance especially on higher
>>> resolutions.
>>> It removes all polygons which consist of less than 8 pixels.
>>>
>>> If you deem that this is too extreme (though 8 pixels is really
>>> nothing, and polygons of less than 8 pixel size are barely noticeable
>>> anyhow - and only slow down map drawing) the following line could be
>>> reduced to maybe 6 or 4 pixels:
>>> +    private static final int MIN_SIZE_POLYGON = 8;
>> Ups forgot to say, I'm actually using it with a value of 15 and it seems
>> to work pretty well with 15.
> Wont it cause routing errors, if little highway-areas will be removed?
>
>
If it is done correctly, the removing of the polygons take place after 
generating of the routing graph. So it should not harm.