[OSM-talk] correctly mapping avenues

[Robert (Jamie) Munro]

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Bernd Raichle wrote:
| Hi,
|
|
| on Sunday, 10 February 2008 08:34:31 -0800,
| Karl Newman <siliconfiend at gmail.com> writes:
|  > On Feb 10, 2008 4:21 AM, Frederik Ramm <frederik at remote.org> wrote:
|  > > > Since trees lining a way/street are such a common occurence, why
|  > > > not have a simple additional tag to the main road.
|  > > >
|  > > > lined_by_trees=yes/no/left/right
|  > >
|  > > I'm a bit unhappy about needlessly inflating the importance of the
|  > > direction of ways. Long-term, I would actually like to get rid of the
|  > > direction and express everything in relations.
|
| This means, that you find it necessary to have something like a
| "direction" or a "side", both of this features related to a way?
| But you don't want to express a direction or a side by the _implicit
| order_ of the way nodes.
|
|
|  > >                                                 The reasons for this
|  > > are
|  > >
|  > > (a) the direction is too easily changed, sometimes by mistake
|
| ... because none of the current OSM editors show direction- or
| side-related tags explicitly.
|
|
|  > > (b) there might be multiple conflicting things that rely on the
|  > >    direction, e.g. a road that is oneway from A to B but has a
|  > >    slope from B to A
|  > >
|  > > Anything with "left/right" in it also relies on direction. I'd prefer
|  > > "east/west/north/south", or using an explicit relation that says
|  > > "trees on the right between nodes A and B along road C".
|
| I am against east/west/north/south because there are a lot of
| ways/areas/things which do not go straight ahead.

But they nearly all run nearer to one of those directions than they do
to any of the others. If you want to say that a North East road is one
way, you can call it North or East - there is no contradiction. Pick the
one it is closest to, or either if the road is really exactly at 45 degrees.

Robert (Jamie) Munro
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