[mkgmap-dev] Configurable flood blocker

Fri Dec 17 17:30:48 GMT 2010

> Thanks Wanmil,
> Those images explained very well what exactly happens.
>
> So what I can do is to add more coastline to the benelux osm data
> to prevent that this coastline is intercepting itself.
> I have to merge osm data (German coastline) to the osm data from the Benelux extract.
> How does this work with osmosis? Or is it possible with mkgmap to combine the coastline with osm tiles?

You can load a separate coastline file using the option 
coastlinefile=coastlines1.osm.pbf,coastlines2.osm.pbf
When using this option the coastlines of your tiles are ignored and are 
only taken from the given file(s). The file(s) need not contain only 
coastlines but I think using the complete original benelux and german 
files here will not be possible due to memory problems.

You can use osmosis (please read the osmosis documentation!) to extract 
the coastlines.
The osmosis call might look like:
osmosis.bat -rb europe.osm.pbf -tf accept-ways natural=coastline -tf 
reject-relations --used-node -wb europe_coasts.osm.pbf

WanMil