Sorry for the late response, I was traveling.
@Mateusz_Konieczny
According to this proposal, the above should be
waterway=drain + covered=slabs.
And this should be
waterway=drain + covered=grating. (I know I said
metal_grating originally, but if we’re leaving out the material, e.g.
slabs rather than
concrete_slabs, we should probably do the same here.)
Confusingly, very often in this area the drains were covered with gratings only for small sections, with the rest being underground and inaccessible (tunnel=*). So I’m not sure whether the following should be tagged as a node with man_made=manhole, as a node with covered=grating, or as a little way with waterway=drain + covered=grating. I guess the third one is the safest.
A section of covered drain short enough to possibly be considered a sewer hole.
Two more such sections, with a relatively linear
covered=grating drain in the background.
@Vonter Thanks for the idea of tagging the actual location of the block. I guess the location of the block should be tagged as a node, if and when someone can figure it out.
I would say that the blocked=* key still makes sense on waterway=drain ways, in cases where the exact location of the blockage cannot be determined. I recall situations where I was unsure of the direction of a drain, because the drain was stagnant.
@mcliquid I understand that tunnel=* is used when the feature is completely underground, and would have to be dug up to be accessed. The covered=* wiki entry says
[Use this tag for:] […] Power lines, water mains, water drains, etc. in a narrow trench, with coverings traversable by traffic (foot, vehicle, or otherwise) and removable for access and maintenance.
So I’m really just proposing some new values for covered=*, which are in line with its current meaning.
@Kovoschiz Thanks for the suggestion to use blockage=*. Perhaps that can be documented.
.jpg){kind=link}