[OSM-talk] Newbie in need of guidance using the OSM Applet and JOSM

[Barry Crabtree]

On 2/28/07, Ray Booysen <raybooysen at rjb.za.net> wrote:
>
> I think its been discussed before that ways shouldn't be that long in any
> case.  We should be splitting them into smaller sections.


Yes, this confused me when I first started.

It seems perfectly natural to think of a 'way' as a particular road. But in
OSM a 'way' represents a section of a road/path/track where all the
*properties* of that section are the same.

So, if the road went over a bridge for example (or changed the number of
lanes or surface), the sections at either side of the bridge and the bridge
itself would be separate 'way's. Its the same if there were a roundabout on
the road, the sections either side of the roundabout would be individual
ways, and the roundabout itself would be a way. All these mini-ways that
make up the road would all have the ref=X or name=X tags the same so we
would know they are sections of the same road, but they are separate ways.

To add to the confusion when people are generating the road network (using
JOSM or whatever), there is a tendency to create quite short ways (for the
sake of argument, lets say a kilometer long) because it makes the editing
easier.

So a way is different from a road - its sections of the road where all the
properties (tags) on that section are the same.. and the can be broken down
into smaller 'way's even if all the tags are the same if it makes it easier
to create them!

Hope this helps.

.Baz

Regards
> Ray
>
> On 2/28/07, hanoj <enemy at mail.muni.cz> wrote:
> >
> > Roozbeh Pournader napsal(a):
> > > On 2/27/07, Ralf Zimmermann <Ralf at zimmermann.com> wrote:
> > >> I think you get the error 400 because you are trying to download an
> > area
> > >> of roughly 2° by 2°. That is not allowed by the server.
> > >> Reduce the download to a MUCH smaller area and it should work.
> > >
> > > For the record, after playing with the API to see the maximum size I
> > > can download, it seems that it is 0.3° by 0.3°. Make it 0.30001° by
> > > 0.30001° and it will not work.
> >
> > I am not happy from it, if I edit 300km long way, or rail crossover
> > Czechia. It is uncomfortable.
> >
> >
> > hanoj
> >
> > _______________________________________________
> > talk mailing list
> > talk at openstreetmap.org
> > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
> >
>
>
>
> --
> Ray Booysen
> raybooysen at rjb.za.net
> _______________________________________________
> talk mailing list
> talk at openstreetmap.org
> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
>
>


-- 
Live as if you were to die tomorrow. Learn as if you were to live
forever.  - Gandhi.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20070228/5875a181/attachment.html>