Invalid crossing

[CP]

I'm stumped. OsmAnd wants me to turn right, but there is no crossing! It's a bridge!



The location is here: https://www.openstreetmap.org/#map=18/50.85919/5.71026

I've been trying to understand how the history of that area works, but I find the OpenstreetMap interface regarding the changesets highly confusing. So I wasn't able to figure out what has been changed in the past.
Can someone confirm this error?

Thanks,
Ceaus

[Xavier]

On Wed, Oct 02, 2019 at 10:07:51PM +0200, CP wrote:
>I'm stumped. OsmAnd wants me to turn right, but there is no crossing!
>It's a bridge!

The two lanes that cross over the bridge have no layer tag, so as far
as OSM is concerned, they are at the same vertical level as the lanes
that cross under the bridge. And lanes at the same vertical level
would naturally 'cross' and allow a turn, which is likely why OsmAnd
says to turn right.

>The location is here: https://www.openstreetmap.org/#map=18/50.85919/5.71026
>
>I've been trying to understand how the history of that area works, but
>I find the OpenstreetMap interface regarding the changesets highly
>confusing.

The web changeset view system *is* highly confusing. The editing tools
themselves have much more understandable changeset viewing tools.

>So I wasn't able to figure out what has been changed in the past. Can
>someone confirm this error?

The two bridge segments should have a layer=1 tag (if they are above
the crossing roads, which appears to be the case from the satelite
imagery). You can either fix this yourself, or ask a local mapper to
make the fix.

I'm not at all 'local' to that area, so I just looked but made no
changes.

[CP]

Thanks, Xavier.

I am familiar to the area and your assumption based on the satellite imagery is correct. They are in fact different layers.
I've done dozens of edits, but never needed layers. You get something to learn every day and again ;-)
I'll dig into the "layer=1" and fix it myself.

Thanks again!
CP

Op 02-10-19 om 23:54 schreef 'Xavier' via Osmand:

[Florian Lohoff]

On Wed, Oct 02, 2019 at 05:54:59PM -0400, 'Xavier' via Osmand wrote:
> On Wed, Oct 02, 2019 at 10:07:51PM +0200, CP wrote:
> > I'm stumped. OsmAnd wants me to turn right, but there is no crossing!
> > It's a bridge!
>
> The two lanes that cross over the bridge have no layer tag, so as far as OSM
> is concerned, they are at the same vertical level as the lanes that cross
> under the bridge. And lanes at the same vertical level would naturally
> 'cross' and allow a turn, which is likely why OsmAnd says to turn right.

Aehm - nope - They need to share a node. Otherwise crossing roads will
not have a connection. I'd be very surprised if OSMAnd would connect
roads which cross

The layer tag is IMHO purely for rendering order purposes. (And
semantically checking objects)

> The two bridge segments should have a layer=1 tag (if they are above the
> crossing roads, which appears to be the case from the satelite imagery).
> You can either fix this yourself, or ask a local mapper to make the fix.
>
> I'm not at all 'local' to that area, so I just looked but made no changes.

Flo
--
Florian Lohoff f...@zz.de
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