On 1/9/19 10:30 am, Graeme Fitzpatrick wrote:
On Sat, 31 Aug 2019 at 20:51, Paul Allen <pla16...@gmail.com
<mailto:pla16...@gmail.com>> wrote:
Verifiability is a problem.
Near here, there's one office building built lake-side, that has a car
park as the ground level of the building. The car park has a line
painted round it, about half way up the wall (1.2 - 1.5 m's) labelled
as the 1-100 year flood level.
Another river side shopping centre has signs down the river end of the
car park, warning that that part of the park floods during heavy rain.
The first one is only a potential, so you wouldn't map that as flood
prone, but you would the second, but how?
You could add flood_prone=yes to the car park tag but that will show
the whole car park as affected, whereas it's only the bit down this
end that has a problem. Would drawing a separate area & marking that
as flood_prone=yes work?
I asked this question some time ago. I was told it was not verifiable
and therefore not for OSM.
My opinion remains - it can be mapped.
However there is the question of frequency, once in 10 year event, once
in 100 etc. So I would add a sub tag or value about frequency of the
event.. The key frequency is already in use. Period has some use too,
though the use looks to be years.. no wiki to say what it is?
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