Layer tag seems to be handled incorrectly sometimes at man_made=pipeline

[Elefant-aus-Wuppertal]

Expected behavior

Correct handling of the layer=* Tag

Actual behavior

layer-Tag seems to be not intrepreted correctly when pipelines with bridge, location and layer tags cross other linear ways:
a) another pipeline
b) a linear highway=* bridge

Screenshots with links illustrating the problem

a) Please have a look at https://www.openstreetmap.org/#map=19/51.24793/7.11005

https://www.openstreetmap.org/way/305111224/ Way 1 (tags bridge=yes, layer=1) should be rendered above https://www.openstreetmap.org/way/809936168/ Way 2. But at the highest zoom level, the opposite is true. Or am I overlooking something here?

b) A similar thing here:

https://www.openstreetmap.org/way/133902548 lays below this pipeline: https://www.openstreetmap.org/way/809936166 (tags at the pipeline: bridge=yes, location=overhead, layer=2)

But the layers seem to be treated not correctly.

Is there maybe a problem using bridge=yes and a location tag on pipelines at the same time together with layer?
Or what's the ssue?

Maybe you can help me.
Thanks a lot.

[imagico]

We do not interpret layer=* for pipelines at the moment.

Pipelines are currently rendered in the aerialways layer - before the roads layers and are sorted according to

openstreetmap-carto/project.mml

Lines 844 to 849 in dae7527

	CASE
	WHEN man_made IN ('goods_conveyor', 'pipeline') THEN 1
	WHEN tags-> 'location' = 'overhead' THEN 2
	WHEN bridge IS NOT NULL THEN 3
	WHEN aerialway IS NOT NULL THEN 4
	END

[Elefant-aus-Wuppertal]

Okay, I see, thanks.

most of the overlaps between highways and man_mande=pileline also work, a few don't.

Then we have to think about how to solve it.

[Elefant-aus-Wuppertal]

By the way, is it like this even possible that a man_made=pipeline gets rendered above a highway tat has a bridge tag?

[imagico]

By the way, is it like this even possible that a man_made=pipeline gets rendered above a highway tat has a bridge tag?

Sure, you would only have to render it after the road bridges - which either requires a layer with pipeline features after the road bridges layer or to integrate pipeline rendering into the road layers.

Neither of these is simple and we do not currently have a clear consensus on the future strategy regarding roads rendering (see #172 (comment) for a summary).

[Elefant-aus-Wuppertal]

I see. Thank you very much for your answer. Now I get what the issue is. I see this is a complex topic. I think it's up on you now whether to loeave this ticket open until maybe there will be some development on this topic, or close it.