[Tagging] How to map "piers" on land?

Matthew Woehlke mwoehlke.floss at gmail.com
Wed Jul 29 13:46:54 UTC 2020

On 28/07/2020 16.09, Paul Allen wrote:
> On Tue, 28 Jul 2020 at 20:44, Matthew Woehlke wrote:
>> Please see https://www.openstreetmap.org/way/651244930. This is a pier
>> with a platform on land that extends into the water. Carto cuts off the
>> part that is on land.
> There is no part of a pier on land.  Not according to the wiki: "A pier is
> a raised
> walkway over water..."


Let's look at some pictures:


What you are saying (okay, maybe what the wiki is saying) is that all of 
these magically cease to be piers at the coastline and become... what?

I don't think most people share that view.

BTW, Wikipedia defines a pier as "a raised structure that rises above a 
body of water *and usually juts out from its shore*" (emphasis added). I 
would expect that most people would interpret the "pier" in the above 
images as being the entire contiguous surface from the end in the water 
until either a) where the support framework ceases, or at least b) the 
narrower section ends at a wider deck.

I have to agree with others; the wiki is wrong. (And I think carto is 
also wrong about the render order; military areas certainly can have 
piers, so rendering in a way which makes them impossible to see is 

On 28/07/2020 18.23, Paul Allen wrote:
 > Or maybe I've seen floating piers. :)

Even floating piers may have sections on land:


...unless you insist on separately modeling the connecting section as a 
bridge. (Which I will concede is feasible in *some* cases. Even in my 
example, if I knew how to tag the on-land part, but less so in the 
examples given above in this message.)

(On a related note, this makes me think we should have pier type tags...)

So... back to my *other* question: how should a raised wooden platform 
on land be tagged? For example:



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