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<div class="moz-cite-prefix">presence looks to be used with taxi
ranks to say when they are expected to have taxies present. <br>
<br>
There is occurrence .. and that is already in use with occurrence
=intermittent as part of an import .. excellent!<br>
<br>
<br>
So <br>
occurrence
=perennial/non_perennial/seasonal/intermittent/ephemeral/summer/spring/winter/autumn/etc<br>
<br>
And of course state that perennial be the default if untagged.<br>
<br>
On 14/12/18 13:09, Tod Fitch wrote:<br>
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<blockquote type="cite"
cite="mid:CD079D4D-CCC7-41FA-98E9-0BFEDFE62BB6@fitchdesign.com">
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I do like the idea of one key to rule them all. But I am
uncomfortable with a key name which has a negative preface.
<div class=""><br class="">
</div>
<div class="">At first I wondered about a perennial tag but then
the values might be difficult. Then it occurred that we are
trying to tag the presence of something, in this case water.
There are only a few things tagged with presence=* now [1] and
they look unrelated to water. But how about:</div>
<div class=""><br class="">
</div>
<div class="">presence=perennial/seasonal/intermittent/ephemeral/summer/spring/winter/autumn/
etc.</div>
<div class=""><br class="">
</div>
<div class="">And state that perennial be the default if untagged.</div>
<div class=""><br class="">
</div>
<div class="">Cheers!</div>
<div class=""><br class="">
</div>
<div class="">[1] <a
href="https://taginfo.openstreetmap.org/keys/presence#values"
class="" moz-do-not-send="true">https://taginfo.openstreetmap.org/keys/presence#values</a></div>
<div class=""><br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Dec 13, 2018, at 4:55 PM, Warin <<a
href="mailto:61sundowner@gmail.com" class=""
moz-do-not-send="true">61sundowner@gmail.com</a>>
wrote:</div>
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<div class="moz-cite-prefix">Thoughts ... (take on
Hobbit like theme - one key to rule them all...)<br
class="">
<br class="">
As both intermittent and seasonal are all render the
same .. why not combine them into one key as well?<br
class="">
<br class="">
<br class="">
non_perennial=seasonal/intermittent/ephemeral/summer/spring/winter/autumn/intermittent_summer/ephemeral_summer
etc<br class="">
<br class="">
I note that intermittent is taken by many as 'I know
it is non-perennial' so it may be appropriate to have
a non_perennial=yes for the more common mapping value.
<br class="">
<br class="">
??? <br class="">
Well? Is that a reasonable idea? <br class="">
<br class="">
It could be implemented as a mechanical edit on <br
class="">
seasonal 1:1. <br class="">
On intermittent=yes ... as non_perennial=yes with a
request to determine a more specific value? <br
class="">
On intermittent=<i class="">season</i> ... as
non_perennial=intermittent_<i class="">season<br
class="">
<br class="">
</i>These could coexist with the present tags while
people changed over. <br class="">
<br class="">
<br class="">
On 14/12/18 10:58, Sergio Manzi wrote:<br class="">
</div>
<blockquote type="cite"
cite="mid:bf5697a2-a81b-5a1e-639b-787528a92f3e@smz.it"
class="">
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<p class="">You can do <b class="">exactly the same</b>
with my new proposed values for intermittent=*</p>
<p class="">No need for a new key, I think.</p>
<p class="">Cheers,</p>
<p class="">Sergio</p>
<p class=""><br class="">
</p>
<div class="moz-cite-prefix">On 2018-12-14 00:48,
Warin wrote:<br class="">
</div>
<blockquote type="cite"
cite="mid:d4261d73-7bcb-7221-7a3d-62e794287732@gmail.com"
class="">
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<div class="moz-cite-prefix">On 13/12/18 12:48,
Sergio Manzi wrote:<br class="">
</div>
<blockquote type="cite"
cite="mid:62423be8-97fd-77f6-86cf-86e66b0ab5a1@smz.it"
class="">
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content="text/html; charset=windows-1252"
class="">
<p class=""><br class="">
</p>
<div class="moz-cite-prefix">On 2018-12-13 02:36,
Warin wrote:<br class="">
</div>
<blockquote type="cite"
cite="mid:358bb889-e62e-be8f-dfe3-ae1140f6efdb@gmail.com"
class="">At the moment developing a system to
render seasonal values on requires a
determination on spring/summer/autumn/winter etc
.. this would add some new terms. Not too hard
but does add to things. </blockquote>
<p class="">Also developing a system to render the
ephemeral key would add some complexity,
probably more...<br class="">
<br class="">
</p>
<blockquote type="cite"
cite="mid:358bb889-e62e-be8f-dfe3-ae1140f6efdb@gmail.com"
class="">Not certain about ephemeral being
subservient to intermittent. <br class="">
</blockquote>
<p class="">If it is not there all of the time,
than it is intermittent.<br class="">
</p>
<p class="">If it doesn't last long, than it is
ephemeral (<i class="">but then it is not there
all of the time and thus it is intermittent
too</i>).</p>
</blockquote>
<br class="">
The primary motivation for me is that a water
feature with intermittent is more likely to have
water, even it I have to dig a meter or two for it,
than a water feature with ephemeral.<br class="">
<br class="">
I don't expect a 'normal' map will tell me this. But
a desert map should. <br class="">
<br class="">
I would map the ephemeral river banks/courses. <br
class="">
But then the places where water pools to form more
permanent water sources I would as natural=water,
intermittent=yes. In this way they can be
distinguished as a more probable source of water. <br
class="">
Some satellite imagery shows these .. but then some
shows the area just after rain! So it requires some
judgements. <br class="">
<br class="">
I'll add this as a rationale ... <br class="">
<br class="">
<br class="">
<br class="">
<br class="">
<br class="">
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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