[Tagging] Feature Proposal - RFC - area:highway

Tobias Knerr osm at tobias-knerr.de
Wed May 11 18:04:23 BST 2011

Flaimo wrote:
> it has been brought up a couple of times in the german forums, so it
> seems there is a need for mapping the dimensions of roads (similar to
> riverbanks for rivers). the tag itself was suggested by another user,
> but i thought it would be a good idea to put it into a dedicated
> proposal.

I agree with the idea of using a tag like area:highway=* on areas that
are mapped in addition to roads, but I'm not sure whether I agree with
the example image provided on the proposal page, too.

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.

-- Tobias Knerr

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