[Tagging] Dangerous waterways tagging

Dave F davefoxfac63 at btinternet.com
Tue Jul 24 09:57:44 UTC 2018


This is another one of those discussion which comes up every year or so.

The perception of danger is subjective; which never fits well within OSM.

Waterways are not dangerous in themselves. They are inanimate objects. 
They don't jump out & attack you as you walk by. It's the naive way 
people interact with them which causes injury.

If there's a sign indicating danger, tag that.


On 23/07/2018 21:48, Fran├žois Lacombe wrote:
> Hi,
> As the discussion about intermittent/seasonal/... on waterways goes 
> on, there is another thing to map: how waterways banks can be 
> dangerous due to sudden rise or lower water level.
> It is actually related to what we intend to map with intermittent or 
> seasonal.
> For example in France, we often find such warning signs:
> https://imgur.com/a/QUxuPem
> Precise sections of streams or rivers are marked as dangerous even in 
> good weather.
> It is stronger than simple intermittence or seasonality because of 
> industrial activities running upstream (mainly hydroelectric power 
> generation or dam operation).
> Nevertheless, I didn't find any global database or public information 
> displaying data about such particular flooding situations. OSM can be 
> one of this kind.
> Here is a public display next to a power plant in French Alps (with a 
> nice piece of OSM without attribution)
> https://imgur.com/a/TLhZcgE
> Then what could be the best way to tag it?
> No existing tag sounds suitable for this, even the idea of a single 
> "permanence" key.
> All the best
> Fran├žois
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> Tagging at openstreetmap.org
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