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fix a link in survey/how and provide some other notes on scale drawing.

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also begin splitting up hints into stuff more or less relevant to modern
instruments.
This commit is contained in:
echarlie
2022-03-31 11:09:23 -04:00
parent 03aae39788
commit cbfeb30e6d
2 changed files with 51 additions and 36 deletions
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15
handbook/survey/how.htm
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@@ -26,6 +26,7 @@ chance to survey, on the derigging trip of a cave which is now "finished"),
it is better to record all the passage, rather than part of it to a very high
standard. Particularly to be avoided is a survey that doesn't connect to the
rest of the cave.</p>
<p><img class="onleft" width=70% src ="../i/76-clipart.png" />
You are collecting data to fulfill a number of needs: the actual position
of the passage for finding where it goes and possible connections; the shape
@@ -81,9 +82,19 @@ visible, to record the location of shelly bands, faults, dip and strike of
any prominent bedding or other cleavage planes, and any old flow markings
(direction and approx diameter). Anything unusual which would make a good
landmark is also useful, and of course, man-made things like pitch rigging,
traverse lines or cairns.</li>
traverse lines or cairns. Refer to the
<a href=https://www.carto.net/neumann/caving/cave-symbols/uis_signatures_english.pdf>
UIS standard symbols</a> for a general guide.</li>
<li>We use Therion protractors undergound for estimating directions when we are sketching passage shape and direction. We have templates in <a href="../templates/therion1_250.pdf">1:250</a> and <a href="../../templates/therion1_500.pdf">1:500</a> scales. (Thanks to Martin Budaj for these.)
<li>We use Therion protractors undergound for estimating directions when we are
sketching passage shape and direction. We have templates in
<a href="../../templates/therion1_250.pdf">1:250</a> and
<a href="../../templates/therion1_500.pdf">1:500</a> scales. (Thanks to Martin
Budaj for these.). Some alternatives for those without access to transparency
slides include an orienteering compass with scale (e.g.
<a href=https://silvasweden.com/collections/compasses/products/compass-classic>
a silva compass</a>), or a metric
<a href="http://cavecompass.com/">cave compass</a></li>
<li>The left, right, up, down (LRUD) from the survey station to the general
passage wall, not the closest piece of rock. These should be <b>measured</b>