[Tagging] tagging floodplain

Mark Wagner mark+osm at carnildo.com
Sun Sep 25 19:07:15 UTC 2016


In the United States, this is usually defined as the "X years
floodplain", indicating how frequently it's expected to flood.  For
example, the 100-year floodplain is the area around a river is the area
that's expected to flood an average of once every hundred years.

-- 
Mark

On Sun, 25 Sep 2016 12:48:10 +0200
Colin Smale <colin.smale at xs4all.nl> wrote:

> Where would the boundary be? How could we describe it objectively? In
> low lying areas such as the Netherlands there are sometimes so called
> winter dykes which give a sharp edge to the flood plain. Otherwise it
> would all be a bit vague around the edges. //colin
> 
> On 25 September 2016 12:30:50 CEST, Warin <61sundowner at gmail.com>
> wrote:
> >Hi,
> >
> >There is a draft to tag floodplains using the key natural.
> >
> >
> >http://wiki.openstreetmap.org/wiki/Proposed_features/floodplain
> >
> >
> >My thinking is that this would lead to conflicts with other
> >'natural' tags .. like natural=scrub than may be applied to the same
> >area.
> >
> >
> >So .. what would be the best key to use for this feature/value?
> >
> >I am thinking that as it is associated with a waterway (it must start
> >to 
> >flood from somewhere and that is usually a waterway) that the key 
> >waterway should be used. It would have rendering similar to a lake -
> >but 
> >'intermittent' so dashed lines rather than a solid colour.
> >
> >
> >Thoughts?
> >
> >
> >{There is presently flooding in some areas of Australia, why my
> >thoughts 
> >have turned to this. All too soon it will turn to bushfires}
> >
> >
> >_______________________________________________
> >Tagging mailing list
> >Tagging at openstreetmap.org
> >https://lists.openstreetmap.org/listinfo/tagging  




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