[OSM-dev] Deleting TIGER node tags

[Apollinaris Schoell]

what about "created" tags? they are pretty much useless too.2G difference on
the uncompressed planet file.

On Tue, Jul 21, 2009 at 10:48 AM, Andy Allan <gravitystorm at gmail.com> wrote:

> On Tue, Jul 21, 2009 at 3:38 PM, Frederik Ramm<frederik at remote.org> wrote:
> > Hi,
> >
> > Andy Allan wrote:
> >>
> >> Tiger node tags make up 85.43% of all node tags and take up:
> >
> > [...]
> >
> > I just did a little test, prepared an .osc document that removed the node
> > tags from about 1000 nodes:
> >
> > http://www.openstreetmap.org/browse/changeset/1894387
> >
> > It came out at roughly 10 node changes per second. I count 177m nodes
> with
> > TIGER tags, which means that the whole process would take about 200 days
> on
> > one API thread. It might be slightly faster if you upload larger or
> smaller
> > chunks - would have to do some experimenting to find the sweet spot. Time
> > could also be saved by running it one the LAN (on dev), but again
> probably
> > not a lot.
>
> Ah, good stuff. I was assuming the best way to do it was a script on
> dev doing 50,000 nodes at a time (i.e. max diff upload) when it came
> to hitting the sweet-spot, but I'm interested in your experiments.
>
> Like you, I'm a bit concerned about the side effects of creating x
> billion changesets, but for replication, verification etc it's nice to
> behave nicely (i.e. through the API). But that just gives everyone an
> added incentive to stop other people doing ill-constructive bulk
> imports in the first place! The sooner we can clear this from TIGER
> the fewer people will use it as an example to aim for.
>
> Cheers,
> Andy
>
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