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<p><font face="Helvetica, Arial, sans-serif">If it is moveable it is
a gantry crane. A gantry per se can be immobile, right?</font></p>
<p><font face="Helvetica, Arial, sans-serif">That aside, rails are
rails. Maybe not a rail line in the conventional sense, but I
tagged an (unfortunately disused) children's train in Ashgabat
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/way/429019713">https://www.openstreetmap.org/way/429019713</a> as a railway even
though it goes around and around, or used to, and has no
destination.<br>
</font></p>
<table class="browse-tag-list" style="box-sizing: border-box;
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"Helvetica Neue", Arial, sans-serif; font-style: normal;
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<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 1px solid rgb(221, 221, 221); width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);">light_rail</th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 1px solid rgb(221, 221, 221); width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);">unused</td>
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<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 1px solid rgb(221, 221, 221); width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);"><a title="The wiki description page for the name tag" href="https://wiki.openstreetmap.org/wiki/Key:name?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">name</a></th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 1px solid rgb(221, 221, 221); width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);">Parawozik</td>
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<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 1px solid rgb(221, 221, 221); width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);"><a title="The wiki description page for the name:en tag" href="https://wiki.openstreetmap.org/wiki/Key:name:en?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">name:en</a></th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 1px solid rgb(221, 221, 221); width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);">Children's Toy Train</td>
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<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 1px solid rgb(221, 221, 221); width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);"><a title="The wiki description page for the name:ru tag" href="https://wiki.openstreetmap.org/wiki/Key:name:ru?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">name:ru</a></th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 1px solid rgb(221, 221, 221); width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);">Детская железная дорога</td>
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<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 1px solid rgb(221, 221, 221); width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);"><a title="The wiki description page for the railway tag" href="https://wiki.openstreetmap.org/wiki/Key:railway?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">railway</a></th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 1px solid rgb(221, 221, 221); width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);"><a title="The wiki description page for the railway=disused tag" href="https://wiki.openstreetmap.org/wiki/Tag:railway=disused?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">disused</a></td>
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<tr style="box-sizing: border-box;">
<th class="browse-tag-k" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; font-weight: 500; vertical-align: top; border-bottom: 0px; width: 146px; overflow-wrap: break-word; white-space: pre-wrap; background-color: rgb(246, 246, 246);"><a title="The wiki description page for the usage tag" href="https://wiki.openstreetmap.org/wiki/Key:usage?uselang=en-US" style="box-sizing: border-box; color: rgb(34, 68, 221); text-decoration: none; -webkit-appearance: none; outline: 0px;">usage</a></th>
<td class="browse-tag-v" style="box-sizing: border-box; text-align: left; padding: 6px 10px; line-height: 20px; vertical-align: middle; border-bottom: 0px; width: 145px; overflow-wrap: break-word; white-space: pre-wrap; border-left: 1px solid rgb(221, 221, 221); background-color: rgb(255, 255, 255);">tourism</td>
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<div class="moz-cite-prefix">On 11/23/2018 2:28 PM, Michael Patrick
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAC54+E7Epbec0UCSrNxoNi8NZQ+JGdEWXH2K7k-dEUrTUeRsOw@mail.gmail.com">
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Some radio telescopes are located on what could be called
rail lines. ...<br>
though these lines have to carry more localised weight and
have a much <br>
larger track width. For a photo see <br>
<a
href="http://www.atnf.csiro.au/resources/imagebank/images/ATCA_in_a_line.jpg"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.atnf.csiro.au/resources/imagebank/images/ATCA_in_a_line.jpg</a><br>
<br>
Ideas for suitable tags for these 'rail lines'?<br>
</blockquote>
<div><br>
</div>
<div>'Rails' certainly, but not 'rail lines' in the
conventional sense., in that a rail line implies an origin
and destination ( in the 'railroad' sense ), in this case
all are parts of a single device, albeit a very large one.<br>
</div>
<div><br>
</div>
<div>A movable support structure primarily constrained in the
horizontal plane is known as a <b>gantry</b> (system). The
constrained path might be pavement, rails, sprockets and the
movement contact point might be wheels, slides, skates,
airbags, tracks, pivot, or some such. The path might be
straight as for cranes or circular in the case of irrigation
systems, and other geometries that might include switches.
They range in size from <a
href="http://go.aerotech.com/gantry?creative=313509089976"
moz-do-not-send="true">tabletops</a> to almost a <a
href="https://www.researchgate.net/profile/Marco_Zimmerling/publication/316674860/figure/fig3/AS:490393876865026@1493930419717/The-open-pit-mine-where-the-wireless-network-was-installed.png"
moz-do-not-send="true">kilometer</a> in some mining and <a
href="https://centrelineirrigation.com.au/image/data/centereline-irrigation-service.jpg"
moz-do-not-send="true">agriculture operations</a>. Their
purpose and action differ from railway / rail line (etc.) -
i.e. primarily <a
href="https://en.wikipedia.org/wiki/Gantry#Devices_and_structures"
moz-do-not-send="true">positioning</a> vs. transport. <br>
</div>
<div><br>
</div>
</div>
<div class="gmail_quote">Michael Patrick<br>
</div>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Tagging mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Tagging@openstreetmap.org">Tagging@openstreetmap.org</a>
<a class="moz-txt-link-freetext" href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a>
</pre>
</blockquote>
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