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<div class="moz-cite-prefix">On 1/9/19 10:30 am, Graeme Fitzpatrick
wrote:<br>
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<div dir="ltr" class="gmail_attr">On Sat, 31 Aug 2019 at
20:51, Paul Allen <<a href="mailto:pla16021@gmail.com"
moz-do-not-send="true">pla16021@gmail.com</a>> wrote:<br>
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<div dir="ltr">Verifiability is a problem. </div>
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<div>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.</div>
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<div>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.</div>
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<div>The first one is only a potential, so you wouldn't map
that as flood prone, but you would the second, but how?</div>
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<div>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?</div>
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<p>I asked this question some time ago. I was told it was not
verifiable and therefore not for OSM. <br>
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<p>My opinion remains - it can be mapped. <br>
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<p>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?<br>
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