Yes it’s possible by first combining pbf files with osmosis. Osmosis supports 
polygons files with mutliple polygons, in case you want to start with a pbf 
file that covers all of north america and then filter that to just leave 
specific areas.

-Emil



On 07 Jan 2015, at 18:37 , Alex Farioletti <[email protected]> wrote:
> 
> Is there a way to combine several metro extracts to reduce the ram 
> requirements to run OSRM?
> 
> my use case is to route within several cities in north america (SF, Toronto, 
> Chicago, Minneapolis) but not really needing anything out side of those 
> areas. I have built an osrm-backend that does north america but I'm needing 
> like 14gb of ram to run it, and that's expensive.
> 
> Can i do this through OSMOSIS? I was looking at it but it seems to only take 
> a single polygon 
> (http://wiki.openstreetmap.org/wiki/Osmosis#Extracting_bounding_boxes 
> <http://wiki.openstreetmap.org/wiki/Osmosis#Extracting_bounding_boxes>).
> 
> I just want to make sure this is even possible before I go down the rabbit 
> hole.
> 
> Alex Farioletti
> 415.312.1674 <>
> tcbcourier.com <http://tcbcourier.com/> 
> _______________________________________________
> OSRM-talk mailing list
> [email protected]
> https://lists.openstreetmap.org/listinfo/osrm-talk

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