On Tue, Nov 30, 2010 at 11:03 PM, Anthony <o...@inbox.org> wrote: > On Tue, Nov 30, 2010 at 8:29 PM, Stefan de Konink <ste...@konink.de> wrote: >> If any of gzip/bzip2/lzma in the general give better compression ratio's >> (20% smaller), then this compression scheme should become the default >> format. > > Depends on the performance. If all you want is max compression > without regard to performance, you're almost surely better off using > raw and then compressing the entire file with LZMA (e.g. 7zip or xz).
LZMA vs. zlib actually makes less of a difference than I thought it would: -rw-r--r-- 1 a a 103M 2010-12-01 08:07 florida.osm.bz2 -rw-r--r-- 1 a a 129M 2010-12-01 08:32 florida.osm.gz -rw-r--r-- 1 a a 74M 2010-12-01 08:19 florida.osm.pbf -rw-r--r-- 1 a a 169M 2010-12-01 08:15 florida.osm.rawpbf -rw-r--r-- 1 a a 62M 2010-12-01 08:15 florida.osm.rawpbf.xz -rw-r--r-- 1 a a 86M 2010-11-25 11:29 florida.osm.xz I suspect it would make *much more difference* when it comes to the full history .osm, though. Does PBF support full history files? Does Osmosis? _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev