OpenStreetMap

h4ck3rm1k3 se dagboek

Plasing deur h4ck3rm1k3 op 19 Augustus 2009 in English. Laas opgedateer op 22 September 2009.

merge many osm filesinto one.
concat them and then merge.
this will also give the ids new ids.

If you want to merge/extract or other mess with OSM files you can also use Osmosis...
osm.wiki/Osmosis

Thanks, I will look at that. I know osmosis is powerful.