[mkgmap-dev] Subdivision width is 36627 at 3230916/1236133

Sun Apr 22 21:03:55 BST 2012

Hi,

AFAIK 3230916/1236133 is only the center point of the problematic 
polygon. I thought that my commit r2028 has fixed problems where a 
single polygon is too big to fit into a subdivision. This is done by the 
class PolygonSubdivSizeSplitterFilter.

The MapSplitter/MapArea class should be a good starting point to track 
down the problem.

WanMil

> Hi Marko,
>
> I think the problem is not at all related to the objects near
> 3230916/1236133.
> This is just the middle of an area which is too large. I am not sure why it
> is too large,
> but I guess the reason could be that it is so empty.
> The intended width is 36627, the maximum value is 32767.
> I assume the effect of this warning is that something is missing on the
> side(s) of the
> intended area.
>
> I do not yet understand the details of the map creation process, so I can't
> say more
> for now. I'll try to find out, but maybe someone else knows more?
>
> Gerd
>
>
>
> Marko Mäkelä wrote
>>
>> This is an old error that mkgmap has been spitting for a while. I spent
>> some time today splitting my map tiles in Northern Finland, and this is
>> what I got now:
>>
>> 2012/04/20 20:55:34 WARNING (Subdivision): 63240012.osm.pbf: Subdivision
>> width is 36627 at 3230916/1236133
>>
>> The tile boundaries are:
>>
>> 63240012: 3171072,1169984 to 3266944,1368576
>> #	: 68.043823,25.105133 to 70.101013,29.366455
>>
>> The point ought to be around here, in a sparsely mapped area:
>> http://www.openstreetmap.org/?mlat=69.327936&mlon=26.524535&zoom=12
>>
>> The primary suspects for this error are these ways:
>>
>> http://www.openstreetmap.org/browse/way/25684606
>> highway = primary
>> ref = 92
>> source = gps
>> [I added a few attributes when splitting this road]
>>
>> and an administrative border with a very long line segment
>> (69.1476278, 25.7386032) to (69.3421159, 26.6885093):
>>
>> http://www.openstreetmap.org/browse/way/32060780
>>
>> I split the highway a little (adding bridges), but this failed to
>> address the issue. I do not think that it is proper to add points to the
>> OSM data of the administrative border.
>>
>> What could be done to fix the error? Could mkgmap insert some
>> intermediate points to the border line segment? If the error comes from
>> the highway, I guess I could split it a bit further.
>>
>> Best regards,
>>
>> 	Marko
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>>
>
>
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