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[mkgmap-dev] Problem with splitter

From Wolfgang Hammel wolfgang.hammel at gmx.de on Mon Mar 12 22:40:13 GMT 2012

Hi Gerd,

when I had the problem some time ago, I did some rough checking on 
splitters output.
What I know so far is, that splitter removes all the ways from a certain 
tile that have no
node inside this tile.
The problem arises when a tile boundary divides a multipolyon that 
consist of normally
a lot of different ways. Tile splitter includes the complete relation 
for that multipolygon
in the output including all the references to the ways that 
mulitipolygon originally consisted of.
But as some of the ways are removed from the output, the multipolygon is 
corrupted and
mkgmap is later no more able to correctly reconstruct the part (or 
parts) of the multipolygon
that fall inside the tile.


Am 12.03.2012 16:06, schrieb GerdP:
> Hi Matteo,
> okay, I am able to reproduce the problem (also without the coastfile
> parameter).
> The log shows some warnings for  relation 541757 (the Lago di Como) , so I
> should be
> able to understand what's happening and why it fails.
> Gerd
> Matteo Gottardi wrote
>> 2012/3/12 GerdP<gpetermann_muenchen@>:
>>> Hi Teo,
>>> I tried to reproduce the problem with mkgmap trunk version r2248, but I
>>> get
>>> different results, esp. I don't see this flooding.
>>> I am using coastlines_europe-120128.osm.pbf, maybe your file is older?
>> Hi Gerd,
>> my coastlines file was the same as yours, only with a different name :)
>> I did some tests. The results were a bit different because of my typ
>> and style files.
>> Using no typ file, the default style file and passing only
>> --generate-sea=multipolygon
>> --coastlinefile=coastlines_europe-120128.osm.pbf the result look like
>> this: http://www.gomatteo.net/17.png
>> PS: I would like to thank all the developers who spends their time
>> working on this great project, without mkgmap my gpsmap60c would be
>> useless :)
>> -- 
>> * Matteo Gottardi | matgott@
>> * ICQ UIN 20381372
>> * Linux - the choice of a GNU generation
>> * GPG Fingerprint:
>> * B9EE 108F 52C8 D50C B667 B1F2 AB56 8A01 BA3D 36A1
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