[OSM-dev] OSM History Splitter

Peter Körner osm-lists at mazdermind.de
Mon Aug 15 19:55:54 BST 2011

Am 15.08.2011 20:22, schrieb master_axe:
> regarding your OSM History Splitter:
> If I have a full planet dump(including history, bz2), and I want to cut a BB
> out of it, your OSM History Splitter is the tool to use?

> So this would be the counter piece to say, osmosis (for current data only)?
It is a subset of osmosis (cutting only) that is also capable of history 

> I ask because I recently made a small change to osmosis to read and write
> the visibility tag, and in parallel found a perl script to extract history
> (history-excerpt.pl)(I'm guessing these two do the same thing now). What's
> the difference?
  - the history-splitter is faster ;)
  - it does requiree less ram (for the same features) with the tradeof 
of reading the file twice (but its usually still faster)
  - it is able to take its cutting-polygons from special .osm files 
(only closed ways are used)

  - when using the --softcut mode, it keeps the history of objects 
complete; so if one version is inside the bbox, all versions are copied


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