[OSM-talk] Area Support /Osmarender

[Etienne]

On 9/17/06, Joerg Ostertag (OSM Munich/Germany) <openstreetmap at ostertag.name>
wrote:
>
> On Sunday 17 September 2006 12:19, Andrew Loughhead wrote:
> > Etienne wrote:
> > > It is possible to tag ways with an elevation key.  See
> > > http://wiki.openstreetmap.org/index.php/Map_features#Properties for
> > > details.
> > >
> > > Currently osmarender doesn't do anything with the elevation key.
> > > Motorways are always drawn on top of unclassified roads whether they
> go
> > > over or under.
> >
> > Can you please clarify if there should be a node at the crossing, or
> > not?  I guess not, as in OSM nodes seem to mean connection.  I have
> > probably done one or two flyovers incorrectly on that basis.
>
> Two roads only share nodes if you can also change from road1 to road2 at
> that
> point. If you cannot change roads at that point they are not allowed to
> share
> points! Otherwise you'll never have a chance to get routing to work
> correctly!


What about a level crossing (where a road crosses a railway)?

Should there be a node there (tagged highway=crossing) or should the lines
just cross without a node?  A car cannot "change roads" at this point onto
the railway, nor can a train get onto the road, but it seems sensible to me
that there should be a node here that is both part of the railway and part
of the highway.

Etienne



-
>
> Joerg
>
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