[OSM-dev] area filtering on change streams?
frederik at remote.org
Sun Jan 20 18:00:01 GMT 2013
On 20.01.2013 18:49, Stephan Knauss wrote:
>> I'd like to maintain an updatable database of OSM data clipped by a
>> polygon. I understand how to initialize the database using osmosis'
>> --bounding-polygon task. But this task does not seem to operate on a
>> change stream. Any recommendations on trimming a change set down?
> As you already noticed only nodes have a coordinate and can be used for
> Select your bounds a bit bigger and filter later in the database. I'm
> using a cron job to clean it up.
Alternatively, if you don't need minutely updates, download and clip the
full area of interest in regular intervals, run a --derive-change task
against the new extract and the earlier version, and load the resulting
.osc into the database.
Frederik Ramm ## eMail frederik at remote.org ## N49°00'09" E008°23'33"
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