[Tagging] RFD pipeline sub tag substance

[Martin Koppenhoefer]

2015-01-28 13:06 GMT+01:00 SomeoneElse <lists at atownsend.org.uk>:

> "grey water" has a specific meaning (waste water that isn't sewage and can
> be further used for e.g. irrigation).  If that's what you mean - great.  If
> you just mean water that you can't drink, then just use something that
> describes it, like "water".
>


thanks for pointing this out. If you are interested in the details, you can
have a deeper read here: EN 12056-1  ;-)



> Although http://wiki.openstreetmap.org/wiki/Key:substance says "water ==
> fresh water for drinking purposes" that doesn't match the real world.
>


+1



>   Mappers adding e.g. irrigation pipes aren't going to check the wiki;
> they'll just say "that's a water pipe", so data consumers can't assume that
> "substance=water" == "fresh water for drinking purposes".
>


+1

I also take back my suggestion above, which was "drinkable=yes/no", because
in the case we are discussing here, we are talking about a pipeline. We'd
need a tag referring to the water in the pipeline, because it is not the
pipeline itself which is drinkable. Maybe water:drinkable=yes/no could do
it. Btw.: if you follow this argumentation, this issue is also occurring
for other features like water taps or fountains (on a semantic level,
amenity=fountain, drinkable=yes doesn't make sense).

cheers,
Martin
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