[OSM-talk] river - stream

[80hnhtv4agou at bk.ru]

>in the ID editor, if you draw a stream - river  line, and it crosses a road, you get a warning, with the suggestion
> 
>add a bridge or tunnel. 
> 
>>Monday, June 8, 2020 5:13 AM -05:00 from Martin Koppenhoefer < dieterdreist at gmail.com >:
>> 
>>Am Sa., 6. Juni 2020 um 18:02 Uhr schrieb Dave F via talk < talk at openstreetmap.org >: 
>>>Do you have an example?
>>> 
>> 
>> 
>>A simple example for a tunnel (here subway) on a bridge would be this:
>>https://www.openstreetmap.org/way/757824513
>>https://fr.wikipedia.org/wiki/Pont_Morand
>> 
>> 
>>  
>>>Whether it's a bridge or tunnel is fairly easily defined by determining
>>>which is taking the load.
>>>If a tunnel's structure was removed, would whitewater's above it
>>>collapse? If 'yes' then it's a tunnel.
>> 
>> 
>> 
>>what I wrote was that - according to some technical definitions - a tunnel must not have something above it, it may be sufficient that it is closed and long enough. I am not sure if we share these definitions in OSM.
>>According to the current wiki, "a tunnel is an underground passage for a road or similar." and also: " tunnel =* is used for roads, railway line, canals etc that run underground (in  tunnel ). "  This doesn't appear to be exhaustive / complete, tunnels could also run underwater, above ground and potentially in the future even in space, no?
>>Many current underwater tunnels are also "underground", as they are often running in a man made structure (embankment like) on the ground or below the water body/river in the ground
>> 
>> 
>> 
>>Cheers
>>Martin
>> 
>> 
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