[OSM-dev] About the geographic data in a .osm file

[Vince Berubey]

I have downloaded "delaware.osm.bz2 " http://downloads.cloudmade.com/americas/northern_america/united_states/delaware#downloads_breadcrumbs
The boundary box I used when I generated my tiles from Generated_tyles.py  were a little bit bigger than the Delaware region.
What I don't understand is why I was able to generate tiles that were in my boundary box, but outside the Delaware area.
So, the .osm file does not exactly contain only the geographic data from the region that you have downladed?
Please look at this file, the red marks are the Delaware borders. I have a lot of tiles generated outside of these borders:
http://postimg.org/image/ogwbjz5ln/
Thank you for any explanation about it.
Best regards.
 		 	   		  
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