[Tagging] This needs to be nipped in the bud

Martin Koppenhoefer dieterdreist at gmail.com
Wed Mar 7 11:24:05 GMT 2012


Am 6. März 2012 10:43 schrieb Pieren <pieren3 at gmail.com>:
> On Tue, Mar 6, 2012 at 10:03 AM, Ross Scanlon <info at 4x4falcon.com> wrote:
>> Definitely not how to map an intersection.  AU list have had several
>> discussions on this and it's junk mapping.


+1 for "star-crossing"=junk


> I still believe that mapping each lane is easier than using verbose
> and encrypted tags (probably that need some special tools on editors
> to handle the lanes together).


+1, dedicated geometry is much easier to understand and lets it become
much clearer where to associate the attributes to and is easier to
compare with reality or aerial imagery rather then using tags and have
the lanes represented implicitly. It does require a relation (e.g. the
proposed type=area) to indicate that there is not dual carriageways
but only lanes (and of course for compatibility no highway-tag on the
lanes), so that you might be able to change any time (or also not if
there is an uninterrupted marking).

So it might be more work to create this but I think it will be more
stable and easier to maintain afterwards.


> But you are right, drawing intersections like here is a nightmare and
> is not reflecting the reality : the intersection is only a square
> where lanes are not painted on the ground. It should be modeled in the
> same way in OSM: just a highway polygon (tagged intersection=yes?)


-1 to the polygon: also on a crossing there is directed traffic even
if the lanes are not marked. A highway-polygon is representing an area
without traffic direction. If there is a direction, use a way.


cheers,
Martin



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