[OSM-dev] Fwd: Re: Data Consistency Checks

Karl Newman siliconfiend at gmail.com
Mon Jun 9 22:04:50 BST 2008


On Mon, Jun 9, 2008 at 12:59 PM, Harald Kleiner <e9625163 at gmx.at> wrote:

> [forgot to reply to the list, original send time Sun, 08 Jun 2008 23:00:36
> +0200, sorry!]
>
> Hi Joerg, thank you for your response!
>
> >
> > If there would be any possibility to combine this with the JOSM validator
> > plugin or as standalone plugin or even as overlay map like the maplint
> > layer
> > a huge step in Quality Assurance had been done.
> >
>
> Combining this with existing work is definitely useful. I think
> transferring information about errors to the server-database could be useful
> if we want to direct people to buggy areas that don't use JOSM...
>
>
> > If your way to check the data is faster than the maplint version, you
> > could
> > maybe adopt the maplint checks as well.
> >
>
> as far as I can see, maplint-checks chould be easily done in SQL.
> Unfortunately the almost-junctions-check is rather expensive. It takes my
> 2GB-RAM-machine 7 minutes to run this check on the Austrian database.
> Running it on whole Europe fails with out of memory...
>
> Harald
>

Are you using PostGIS or some other spatially-aware database to perform
these checks? If not, you should. It is designed for that sort of thing and
shouldn't have the memory problems. It will likely be quite a bit faster,
too.

Karl
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