[mkgmap-dev] split multipolygon not shown in both img tiles

Sat Jan 23 12:10:49 GMT 2021

Hi Gerd,

In OSM/Mapnik the park was rendered green so I (wrongly) assumed that the OSM-data must be OK.
Should have checked in JOSM, sorry...

I am glad to hear you could (re)use the test case and fix a related bug so thankfully it wasn't a complete waste of time :)

Thanks for the fix!

Ranko

On 23.01.2021. 9:04, Gerd Petermann wrote:
> Hi Ranko,
>
> I've found a bug in mkgmap that caused this. Fixed with r4597, so thanks for reporting this :)
> I've also fixed the wrong multipolygon in OSM.
>
> ciao,
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Gerd Petermann <gpetermann_muenchen at hotmail.com>
> Gesendet: Samstag, 23. Januar 2021 07:55
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] split multipolygon not shown in both img tiles
>
> Hi Ranko,
>
> the outer way of the multipolygon is not closed, so it is a data error, but I am surprised about the result. When I correct the multipolygon the map looks OK.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ranko Jaksic <rjaksic at zgi.hr>
> Gesendet: Freitag, 22. Januar 2021 19:24
> An: mkgmap-dev
> Betreff: [mkgmap-dev] split multipolygon not shown in both img tiles
>
> Hi Gerd,
>
> I found another case where a split mp is not properly handled in mkgmap.
>
> When following relation (park with inner lake) is split verticaly (so that the lake is intersected) then the park is shown in only one of the generated img tiles.
>
> https://www.openstreetmap.org/relation/3351946
>
> I have uploaded my test data to http://files.mkgmap.org.uk/
>
> rj-mp-split.zip
>       relation-3351946.osm.pbf   (OSM data for this relation)
>       areas-test.list   (areas.list for splitter)
>
> Test code:
>
> java -d64 -Xmx8G -jar splitter.jar  --split-file=areas-test.list relation-3351946.osm.pbf
> java -d64 -Xmx8G -jar mkgmap.jar  -c template.args --gmapi --remove-ovm-work-files
>
> I am using mkgmap-r4574, but also tested with latest mkgmap-r4596 and the results are the same...
>
> regards,
> Ranko
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