[OSM-dev] keeping up to date an extract of planet.osm

Frederik Ramm frederik at remote.org
Tue May 18 09:58:49 BST 2010


Hi,

Stefano Salvador wrote:
> I would like to set up a copy of OSM DB only for a small region and
> then keeping it up to date with the replicates, is this possible ?

You will need to apply the full diffs and afterwards cut off anything 
you're not interested in.

If you intend to do it for a rather small area then it is really quite 
easy and performs well with Osmosis. Assuming you have a current extract 
of your area in "current.osm" and you have the Osmosis replication set 
up properly (--rrii), then you simply run

osmosis --rri --simc --rx current.osm --ac --bb <boundingbox here> 
clipIncompleteEntities=yes --wx new.osm && mv new.osm current.osm

as often as you like. The <boundingbox here> has to be replaced by a set 
of "left=x right=x top=x bottom=x" where you specify the section you are 
interested in.

Bye
Frederik




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