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
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 Marko