[mkgmap-dev] Option generate-sea buggy

Sat Oct 23 06:17:20 BST 2010

Am 18.10.2010 09:33, schrieb Marko Mäkelä:
> On Sun, Oct 17, 2010 at 09:17:33PM +0200, Minko wrote:
>> Maybe it's caused by the geofabrik extract of germany.osm because I 
>> notice the same problems happen for the same region (near Emden) if I 
>> use the Benelux abstract from planet.openstreetmap.nl
>> For my Benelux maps I have use the europe.osm extract from geofabrik 
>> and then split it with a wider border area.
> 
> My workaround for this problem is to move the endpoints of the coastline 
> to the tile borders. This is part of my osm2img.sh script:
> 
> bzip2 -dc "$OSM_BZ2"|
> perl -e \
> 'my $del=0;
> while(<>){
>      $del=1 if (/<relation.* version="1".* user="usm78-gis"/);
>      s/(<node id="28954644".*lat=)"60\.51564"/$1"59.326172"/;
>      s/(<node id="29193143".*lon=)"24\.12826"/$1"19.072266"/;
>      print unless $del;
>      $del=0 if m|</relation>|;
> }'|
> tee "$OSM"|
> $JAVACMD $JAVACMD_OPTIONS -jar splitter.jar --split-file=areas.list

Sorry, this is to high for me.

>> Maybe the German extract has a border area that is too small so some 
>> coastlines get broken?
> 
> That should be easy to check. Just extract the natural=coastline ways 
> from the German extract with Osmosis, and load the result in JOSM. That 
> is how I fixed the generate-sea for my map of Finland. Something like 
> this should do the trick:
> 
> osmosis --rx germany.osm --tf accept-ways natural=coastline --used-node --wx germany-coastline.osm

As Minko I use now europe.osm and cut out a rectangular piece with
osmosis. Map is now good.
The disadvantage is, that I have to download 5,4 GB instead of 1 GB and
creating the map takes half a day instead of one and a half hours.

I wrote the problem to geofabrik.

Thanks
Josef