<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Hmm, but it looks to me, that scale is only up to altitude 481m, which is altitude of entrance. No surface centerline taken into account.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">S.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 23 March 2017 at 16:17, Duncan via Therion <span dir="ltr"><<a href="mailto:therion@speleo.sk" target="_blank">therion@speleo.sk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Yes the entrance is marked.<br>
I've attached the Aven view with entrances highlighted (Therion
generated 3D file).<br>
Note that the surface legs have been excluded from the Aven
presentation.</p>
<p>Entrance was declared as follows:<br>
cs OSGB:XX<br>
fix 21 XXXXX XXXXX 480 # Tweaked to match Google Earth<br>
station 21 "Old Mine" entrance<br>
Coordinates blanked out at this time.</p><span class="HOEnZb"><font color="#888888">
<p>Duncan<br>
</p></font></span><div><div class="h5">
<br>
<div class="m_4559159039509600400moz-cite-prefix">On 23/03/2017 13:36, Martin Sluka via
Therion wrote:<br>
</div>
<blockquote type="cite">
<div>Is there entrance marked?</div>
<div><br>
</div>
<div>m.s.</div>
<div><br>
On Mar 23, 2017, at 02:04 PM, Duncan via Therion
<a class="m_4559159039509600400moz-txt-link-rfc2396E" href="mailto:therion@speleo.sk" target="_blank"><therion@speleo.sk></a> wrote:<br>
<br>
</div>
<div>
<blockquote type="cite">
<div class="m_4559159039509600400msg-quote">
<div class="m_4559159039509600400_stretch"><span class="m_4559159039509600400body-text-content">We
surveyed the surface above an old mine to get a feel for
how thin the <br>
roof is.<br>
See attached Loch screenshot.<br>
<br>
Unfortunately, the surface legs are being included in
the Depth value <br>
displayed on the Plan PDF (see attached).<br>
Displayed value is 13m, it should be about 8m. 13m is
the maximum <br>
vertical extent of all our survey legs.<br>
<br>
The centerline data for the surface legs has been
flagged as "flags <br>
surface".<br>
These have been correctly omitted from the cave length,
and cave length <br>
is updated when the surface flag is commented out.
However, the vertical <br>
range does not alter when the surface flag is toggled.<br>
<br>
I expected cave depth to be the maximum vertical range
of the <br>
underground data.<br>
Hope someone can set me straight :)<br>
Duncan<br>
<br>
</span></div>
<div><OldMineLoch.JPG></div>
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