[mkgmap-dev] more refined mkgmap:skipSizeFilter=true handling

Wed May 15 09:24:46 BST 2013

forgot to mention that it is r2609 in the overview2 branch.

Gerd

GerdP wrote
> Hi,
> 
> I've committed r2609 that implements new option polygon-size-limits. 
> It turned out to be rather complicated to use the levels value, so I
> decided to
> use the resolution. 
> 
> If given and syntactically correct, the option overrides the value for
> min-size-polygon.
> 
> I hope that helps...
> I do now try to find a solution for the small sea/land polygons.
> 
> Gerd
> 
> --polygon-size-limits=limits code
>   Allows to specify different min-size-polygon values for each resolution.
>   Sample:  
>   --polygon-size-limits="24:12, 18:10, 16:8, 14:4, 12:2, 10:0"
>   If a resolution is not given, mkgmap uses the value for the next higher 
>   one. For the given sample, resolutions 19 to 24 will use value 12,
>   resolution 17 and 18 will use 10, and so on.
>   Value 0 means to skip the size filter. 
>   Note that in resolution 24 the filter is not used.  
> 
> 
> Felix Hartmann-2 wrote
>> for me not (I only need it for sea anyhow). but the current 
>> implementation is to have the mkgmap:skipSizeFilter=true to be added to 
>> the style-file. min-size-polygon="0:12, 1:12, 3:12, 4:12, 5:10, 6:8, 
>> 7:8, 8:4, 9:2, 10:1" or similar was my original request for this...
>> 
>> On 14.05.2013 17:47, Henning Scholland wrote:
>>> But this should be handled in options. Like:
>>>
>>> min-size-polygon="0:12, 1:12, 3:12, 4:12, 5:10, 6:8, 7:8, 8:4, 9:2,
>>> 10:1"
>>>
>>> Or is it necessary to handle it different for different polygon types?
>>>
>>> Henning
>>>
>>> Am 14.05.2013 23:25, schrieb Felix Hartmann:
>>>> b) A more optimal solution would be the following:
>>>> mkgmap:changeSizeFilter="level:filter_strenght" so e.g. "0:12, 1:12,
>>>> 3:12, 4:12, 5:10, 6:8, 7:8, 8:4, 9:2, 10:1"
>>>> A filter working this way, would have great impact on the overview.img
>>>> size, as well as normal map.img size - without leading to strong visual
>>>> impact. (up to 50% saving on the overview.img size)
>>>
>> 
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