<div dir="ltr">I designed a UK symbol set for just this purpose. You can pull a copy from the British Caving Association registry where I (and many other UK cavers) publish and share our data. See the gb_layout.thc file in the Wookey Catchment repo:<div><br></div><div><a href="http://www.cave-registry.org.uk/svn/WookeyCatchment/">http://www.cave-registry.org.uk/svn/WookeyCatchment/</a></div><div><br></div><div>My project in that catchment is Swildons. So if you want to see how I include it in a Therion project just download the data set and process the thconfig-swildons_ent Therion project file in the Swildons folder.<br><div><br></div><div>Footleg<br><br><div class="gmail_quote"><div dir="ltr">On Mon, Aug 14, 2017 at 11:36 PM Wookey via Therion <<a href="mailto:therion@speleo.sk">therion@speleo.sk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 2017-08-14 11:51 -0700, Rob Countess via Therion wrote:<br>
<br>
> It would seem like a break in tradition to use a different symbol for mud. I've<br>
> been surveying caves for 20 years with this symbol. As far as I understood, we<br>
> were using British mapping symbols because of the large number of British<br>
> cavers like Mike Boon and Tich Morris, and others who came over because of<br>
> Derek Ford at McMaster University. I used to have a huge list of symbols with<br>
> this mud symbol included, I can't find anything to back this up several pages<br>
> deep on google. You will notice that the UIS calcite symbol is exactly the mud<br>
> symbol in Canada whereas our calcite symbol is connected scallops. Not sure if<br>
> this is based of some now defunct british symbols set.<br>
<br>
You don't have to draw your caves with the UIS sysmbol set. You can<br>
choose a different symbol-set if you prefer. As you say, the lack of a<br>
'mud' sysmbol is a bit difficult for cavers of a UK mindset, but the<br>
UIS logic in just defining sediments by particle size does make some<br>
sense.<br>
<br>
Therion is quite happy for you to specify any sysmbol set you like, or<br>
to add a few extra sysmbols. (Most UK surveyors can't really get by<br>
without the 'slope arrow' symbol for example)<br>
<br>
Wookey<br>
--<br>
Principal hats: Linaro, Debian, Wookware, ARM<br>
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</blockquote></div></div></div></div>