[Patch] Suspicious combination: False positive on power=cable + tunnel=yes

[Gazer75]

Validator flags this as suspicious. Using this combination is valid for cables that are in tunnels. Typically used under cities or out from hydro power stations inside mountains.

[skyper]

Most of the power=cable probably need only location=*, so I wonder if we could use location=tunnel instead of tunnel=*.

[francois.lacombe]

However we don't use location=tunnel with highways that runs in a tunnel mapped with a dedicated feature, nor bridges as well.

Such a change should be discussed on wiki or @tagging prior to get on JOSM stash.

[skyper]

Wait a minute, I was not talking about changing tunnel=yes to location=tunnel, in general, but use it for power=cable.

tunnel=yes is mentioned on the ​wiki but I did not find this combination in the data, according to taginfo.
Are there any other power=* which are running through tunnel?

[francois.lacombe]

I was indeed dealing with tunnel=yes and location=underground meaning for power=cable only. Changing (and discussing) this should be done on wiki actually.

tunnel=yes + power=cable should be used here for instance, regarding London Power tunnels : ​https://www.openstreetmap.org/way/447728811
​https://cdn.ca.emap.com/wp-content/uploads/sites/9/2018/02/Cables-installation-from-tunnel-into-shaft1.jpg

Let's sum up existing possible tagging with this:

• location=underground + power=cable, cables are buried underground and you can't visit them
• tunnel=yes + power=cable (+ location=underground optional), cables are installed in a tunnel you can visit

To me, location=tunnel + power=cable could mean power cables are installed in a tunnel we can visit but the tunnel is mapped with another dedicated feature, that's my 2 cts.

[skyper]

Ok, I remember similar situations with (un-)covered waterways in tunnels next to or below paths.

So, power=cable is the only way from power=* which should be allowed to have a tunnel=yes. Is tunnel=culvert ok ?

[Gazer75]

Cables can also be in tunnel and under ground ;)
Technically it is already under ground when in a tunnel, but road tunnels will usually have power cables dug in along the road edge. So then the cable is under ground and in a tunnel :)

[skyper]

patch

[skyper]

So the change is quite simple: josm_20471.patch​

Replying to Gazer75:

Cables can also be in tunnel and under ground ;)
Technically it is already under ground when in a tunnel, but road tunnels will usually have power cables dug in along the road edge. So then the cable is under ground and in a tunnel :)

Interesting: power=cable, tunnel=[yes|culvert], covered=yes, location=[underground|tunnel], layer=-[2-5]? And do not forget to add it to the tunnel relation.

[Klumbumbus]

In 17789/josm:

fix #20471 - Don't warn about tunnel=* on power=cable (patch by skyper)

[mdk]

#18815 is related (canal + tunnel, with several examples from the wild)

[Klumbumbus]

Yes I'm already investigating... ;)