[Tagging] Feature Proposal - RFC - area:highway

Josh Doe josh at joshdoe.com
Wed May 11 18:25:34 BST 2011

On Wed, May 11, 2011 at 1:04 PM, Tobias Knerr <osm at tobias-knerr.de> wrote:
> In the example image, "lanes" (in this case: sidewalks) of the road that
> are mapped as separate ways also have their own areas. Currently, I tend
> to instead support one area for the entire road, containing the central
> highway ways and the ways for the "lanes".
> If you follow the convention that each way should be drawn along the
> center of the real-world feature, then the width of e.g. a sidewalk can
> still be determined at any point along the road from just the single
> outline area and the way position. So unless I'm mistaken, separate
> areas for the individual "lanes" wouldn't provide more information;
> they'd just add more clutter.

I think this depends on whether you adopt the "sidewalk as a separate
way" method or the sidewalk=left/right/both/no method. In my area of
suburbia, I'm using separate ways, so I would likewise use two
separate areas. For other areas that use sidewalk=*, such as cities
with "integrated" sidewalks and streets (such as Washington D.C.), it
might make more sense to use a single area, depending on the local

That being said, I don't intend to use this tagging yet. I'd be more
interested in seeing an integrated method that would allow tagging not
only the area of the road, but also separate lanes that allow for
turning restrictions, to be used for simulation purposes as well as
precise navigation.


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