[osmosis-dev] Geometries for the relations table of pgsnapshot

[Brett Henderson]

Hi Paul,

On 25 October 2012 11:37, Paul Norman <penorman at mac.com> wrote:

> I keep a pgsnapshot database up to date on my home server for a local jxapi
> server and also for analysis.
>
> I have a linestring column built for the ways table, but there's no
> geometry
> for relations.
>
> I am wondering what would be involved with getting a geometry column built
> for the relations table.
>
> I expect this would slow down updates, but it would be invaluable to for
> analysis.
>
> I believe Ian Dees mentioned to me something about some work that had been
> done on this.
>
> Is there anything that I could do to help? I have minimal java knowledge
> and
> some postgis knowledge.
>
>
Osmosis currently has no understanding of how relations relate to physical
shapes.  In other words, it has no way to examine the tags of a relation
and build a polygon or linestring using the members of the relation.

It's not something I've investigated myself, so to be honest I have very
little understanding of what would be involved.  I suspect it would require
substantial effort.  Hopefully others have a better understanding than I do.

Brett
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