OpenStreetMap

h4ck3rm1k3ರ ದಿನಚರಿ

h4ck3rm1k3 ಅವರಿಂದ 19 ಆಗಸ್ಟ್ 2009 ರಂದು English ನಲ್ಲಿ ಪೋಸ್ಟ್ ಮಾಡಲಾಗಿದೆ Last updated on 22 ಸೆಪ್ಟೆಂಬರ್ 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.