[Tagging] Culverts and Fords

[Andy Townsend]

On 28/02/2018 21:31, Vao Matua wrote:
>
> What I would like to do is simply merge a node of the road and a node 
> of the stream and give it the tag tunnel=culvert (when I do this JOSM 
> complains)
Because that would then be a ford rather than a culvert - you're 
implying that at a certain point (the joining node) you've got your feet 
on the road and in the stream?

>
> In the case where a culvert carries a watercourse over a road then it 
> would make sense to create a way and layer=1

That sounds (at least in English English) like some sort of bridge 
(aqueduct) rather than a culvert - though this did come up the last time 
that culverts were discussed on this list** - someone found an old 
picture of a car going over a bridge over a culvert and thought that the 
picture's title ("the culvert") referred to the bridge.

If you genuinely don't know how a road crosses a waterway then you can 
of course just have the one crossing the other.  QA sites will flag this 
as an error (which is correct - it is) but if you don't have any 
information about how to correct the error (is there a ford?  bridge? is 
there no bridge but the stream runs in a box culvert?) then to my mind 
there's no problem leaving the "error" there so that someone who has 
more information can correct it.

Best Regards,

Andy

** 
https://duckduckgo.com/html?q=culvert%20site%3Ahttps%3A%2F%2Flists.openstreetmap.org%2Fpipermail%2F 
gets some hits.  There were also a bunch of discussions around the time 
that 
https://wiki.openstreetmap.org/wiki/Proposed_features/Simple_one_node_bridge 
was created - so have a look at the lists then.