[OSM-talk] The segments vs ways vs superways question again...

David Earl david at frankieandshadow.com
Wed Jan 3 10:59:36 GMT 2007



> -----Original Message-----
> From: talk-bounces at openstreetmap.org
> [mailto:talk-bounces at openstreetmap.org]On Behalf Of bvh
> Sent: 03 January 2007 10:00
> To: talk at openstreetmap.org
> Subject: Re: [OSM-talk] The segments vs ways vs superways question
> again...
>
>
> On Wed, Jan 03, 2007 at 10:01:35AM -0000, David Earl wrote:
> > If the structure is changed, would it make sense at the same time to
> > explicitly represent areas rather than relying on tags to imply this
> > (consider the difference between natural=water and junction=roundabout
> > applied currently to a colection of ways): an area would be a
> collection of
> > nodes where the last is defined to close with the first.
> >
> > <area ...>
> >   <tag k='natural' v='water' />
> >   <tag k='name' v='Mill Pond' />
> >   <noderef id='...' />
> >   <noderef id='...' />
> >   <noderef id='...' />
> >   ...
> > </area>
>
> Not good enough : think about areas with holes in it. (Lake with islands
> came up)
>
> cu bart

OK, so you could have the area analogy of a group as well; but my point was
that it might be a good idea to distinguish areas from paths explicitly
rather than implicitly.

David





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