[Tagging] Spillways

Warin 61sundowner at gmail.com
Thu Mar 23 23:24:55 UTC 2017

On 24-Mar-17 03:51 AM, Tobias Wrede wrote:
> Hello,
> actually, I have used
>    warterway=spillway
>    intermittent=yes
> in the past, reasoning that this particular spillway 
> (http://www.openstreetmap.org/way/451309286) is rarely put to use, 
> while others might be more permanently flooded (regularly during high 
> tides for example)
> Tobias
> Am 23.03.2017 um 12:58 schrieb John Sturdy:
>> I suppose  waterway=weir plus intermittent=yes would describe it, but 
>> I don't think that's as good as a specific spillway tag.
>> On Thu, Mar 23, 2017 at 6:52 AM, Andrew Harvey 
>> <andrew.harvey4 at gmail.com <mailto:andrew.harvey4 at gmail.com>> wrote:
>>     On 22 March 2017 at 16:56, Dave Swarthout
>>     <daveswarthout at gmail.com <mailto:daveswarthout at gmail.com>> wrote:
>>     > Weir does not seem appropriate for this type of thing. There is
>>     a tag,
>>     > waterway=spillway, that seems like a good fit - 81 uses so far.
>>     I've seen these tagged as waterway=drain which is close but agree
>>     that
>>     waterway=spillway is better. Would be great to have this
>>     documented on
>>     the wiki.

There is at least one 'spillway' that is a pipe in the lake ... shaped 
like a funnel for flow ... but it is not your traditional 'spillway' in 
that it does not go over the wall but under.
In that case 'drain' is a more appropriate word... but the function is 
still a spillway.
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