Hmm, this reply is probably way too late to be useful ... but I'll hit send anyway ;-)
Wow, the Australian polygon is 2.32MB which I thought was huge. From memory I think Australia worked okay (although it took something like 10 minutes to parse into an java Area class), but there was very little data in Australia at the time I tried and the planet was considerably smaller so that may have been the difference. The BitSet id tracker is definitely the one to use for extracting a single large area, in particular because the US contains a large percentage of the total database. I don't have much to add over what others have already suggested. A 3.4MB polygon contains an enormous number of points, reducing the number of points would be the first thing to try. Milenko wrote: > Sorry to reply to my own message, but the usa polygon from maproom is > 3.4MB, not 10. > > -Jeremy > > ----- Original Message ----- > *From:* Milenko <mailto:[EMAIL PROTECTED]> > *Cc:* [email protected] <mailto:[email protected]> > *Sent:* Monday, January 07, 2008 8:27 PM > *Subject:* Re: [OSM-talk] Osmosis and large bounding polygons > > The polygon file is quite large - around 10MB if I remember > correctly. Most of the states are only 100KB or so, so it is much > much larger than any of the states. > > Is there any easy way to edit these polygon files? They're > basically just a list of lat and lon values I think, but it'll > take forever to edit one of that size by hand. > > I'll try it without the larger heap size as well, but if I > remember correctly java was using around 300MB or so of RAM while > it was running. I'll double-check it though. > > -Jeremy > > ----- Original Message ----- > *From:* Karl Newman <mailto:[EMAIL PROTECTED]> > *To:* Jeremy Adams <mailto:[EMAIL PROTECTED]> > *Cc:* [email protected] <mailto:[email protected]> > *Sent:* Monday, January 07, 2008 7:42 PM > *Subject:* Re: [OSM-talk] Osmosis and large bounding polygons > > On Jan 7, 2008 3:33 PM, Jeremy Adams <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > Does anyone have any experience with osmosis and > extracting large polygons? I'm trying to get the united > states exported using the files from the maproom. I can > extract a single state in about an hour and a half, but > getting the whole country takes exponentially longer than > that. As of right now, it's been running for about three > hours and the output .osm file is only about 300MB and > that's uncompressed. > > By command-line is as follows: > > java -Xmx1024m -jar osmosis.jar --rx EnableDateParsing=no > file="/home/jadams/planet-latest.osm" --bp > file="bin/polygons/united_states2pts.txt" > idTrackerType=BitSet --wx file=" usa.osm" > > I've tried with and without enabledateparsing and > idtrackertype and it's not really any faster. > > Is this expected performance, or do I have something wrong > somewhere? > > -Jeremy > > _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
