Make tunnel=culvert for waterways render as less glaring

[SinusPi]

Expected behavior

Completely underground waterways (canals or drains in culverts, usually) should be barely visible, an outline or transparent blue line, not to disturb surface features' visibility - similarly how highways in tunnels are shown (semi-transparent), or how underground pipelines shown (that is, not shown at all).

Actual behavior

Rendered as a culvert, glaring white line in blue dashed outline, sometimes looking even more visible than an overground drain.

Links and screenshots illustrating the problem

https://i.imgur.com/vXypax4.png (actually a canal, not a drain, but the issue is the same)

[imagico]

For clarification: We do not currently interpret location=underground on waterways, special rendering is based on tunnel=*.

[HolgerJeromin]

Just for later reference moved the image to github itself:

[imagico]

Note that is not how OSM-Carto renders drains, this is how OSM-Carto renders drains at z19:

https://www.openstreetmap.org/#map=19/47.98741/7.72307

[SinusPi]

Fair enough. So in my opinion `tunnel=*` should at least be giving the way an outline, but without enforcing a white background behind it. Turning everything `location=underground` invisible, so as not to confuse regular users of "surface" maps with too much detail (useful mainly for maintenance personnel, using possibly different map flavors), remains a separate subject.

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On Fri, 21 May 2021 at 15:44, Christoph Hormann ***@***.***> wrote: For clarification: We do not currently interpret location=underground on waterways, special rendering is based on tunnel=*. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4405 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB3QELMNPCOJLAZAW57UWVTTOZPVVANCNFSM44ZEYHZQ> .

-- Adam "Sinus" Skawiński

[imagico]

Note my comments do not mean i consider this issue to be without merit. It is however non-trivial to fix this in a good way. We have a certain overall convention how to render tunnel features and waterway tunnels need to fit into that for an intuitively readable map.

For further context see: #2346, #3180, #3349, #4087.

[SinusPi]

My bad, my case was a canal, not a drain. Hence, it had a substantial width, and thus looks even more visible when in a culvert: https://www.openstreetmap.org/#map=19/52.24499/21.12783

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On Fri, 21 May 2021 at 16:13, Christoph Hormann ***@***.***> wrote: Note my comments do not mean i consider this issue to be without merit. It is however non-trivial to fix this in a good way. We have a certain overall convention how to render tunnel features and waterway tunnels need to fit into that for an intuitively readable map. For further context see: #2346 <#2346>, #3180 <#3180>, #3349 <#3349>, #4087 <#4087>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4405 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB3QELMKWX3H277BHVRMCM3TOZTCBANCNFSM44ZEYHZQ> .

-- Adam "Sinus" Skawiński