[Tagging] RFC proposed water property key 'ephemeral '
Warin
61sundowner at gmail.com
Tue May 22 22:53:56 UTC 2018
On 23/05/18 07:25, Mateusz Konieczny wrote:
>
>
>
> 21. May 2018 22:34 by 61sundowner at gmail.com
> <mailto:61sundowner at gmail.com>:
>
> Hi,
>
> Following from the discussion on "Seasonal, intermittent, and
> ephemeral water tags" I have created this proposal.
>
>
> Hopefully the definition is tight enough that it excludes
> intermittent, seasonal and any other thing that is not ephemeral.
>
> I have also included a guide on determination so that mappers can
> see how to determine if something is ephemeral.
>
>
> So here it is ...
>
> https://wiki.openstreetmap.org/wiki/Proposed_features/ephemeral
>
>
> Is it clear? Do you understand it?
>
>
> No, "ephemeral=summer" is unclear -
>
It is a possible ephemeral flow (a flow of short duration) ... that can
only occur in summer.
Similar to a tag seasonal=summer ... something that is seasonal that can
only occur in summer.
I quote from the seasonal OSM wiki page
"describes exact season (if possible) when feature is present."
I'll put simillar on the proposed ephemeral page too, see below.
> is it
>
> for flow that is constant but ephemeral
>
An ephemeral flow is of short duration.
A constant flow would be there all the time ... so it could never be
described as ephemeral.
-------------------
The tagging text on the ephemeral page now reads
"If a season is specified it states the exact season (if possible) when
the ephemeral can occur, during other seasons there would be no
ephemeral flow.
For example, when tagged ephemeral=summer the ephemeral flow can only
take place in summer, thus the ephemeral flow is restricted to one season."
Is that clear?
------------------------------------
Note that ephemeral=yes does not mean that a flow will occur every year.
It only says that any flow will be of short duration and will be dry
most of the time.
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