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<p>I'm with Matteusz on this. There are 32 examples in Ireland
(using ditch=ha_ha") and 30 in the UK (using barrier=haha). There
are even placenames referring to ha-has, like <a
moz-do-not-send="true"
href="https://www.openstreetmap.org/way/233762296">a street</a>
in Killarney, Co. Kerry of that name. They're not just any ditch,
but part of the planned park landscape of a manor house. I think
they deserve their own tag to be differentiated from just ordinary
ditches on any old farm. (No offence to the non-gentry farmer
intended.)</p>
<p>Anne<br>
</p>
<div class="moz-cite-prefix">On 29/12/2021 17:12, Raphael wrote:<br>
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cite="mid:CA+aB_PvP1jFCh9nam91ri3P3nvX+JR+xqLnK3AG_wYgn7eWutQ@mail.gmail.com">
<pre class="moz-quote-pre" wrap="">Hi together
On Wed, 29 Dec 2021 at 17:48, <a class="moz-txt-link-rfc2396E" href="mailto:osm.tagging@thorsten.engler.id.au"><osm.tagging@thorsten.engler.id.au></a> wrote:
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<pre class="moz-quote-pre" wrap="">I would have just mapped these as a 2 parallel ways with barrier=retaining_wall and man_made=embankment (such that the “downward” side of each is pointing towards each other).
This allows the exact mapping of not just the position of the wall, but also the top of the slope towards the wall.
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<pre class="moz-quote-pre" wrap="">
I would also map it that way.
Analogously, in the case of a double ha-ha, i would map it as a
man_made=embankment, a barrier=wall and another man_made=embankment.
(Or as two barrier=retaining_wall in the case of a wide trench
consisting of two retainging walls [^1], which according to Wikipedia
is also a ha-ha.)
[^1]: <a class="moz-txt-link-freetext" href="https://commons.wikimedia.org/wiki/File:Petit_Trianon_Haha.JPG">https://commons.wikimedia.org/wiki/File:Petit_Trianon_Haha.JPG</a>
Regards
Raphael
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