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Interesting questions. In the the main cave I survey, we use a value
(called "share") between 0 and 1 for each shot (normally we use 0,
0,5 and 1 and a very few times 0,3 and 0,7). If the the share = 0,5,
means that only 50 % of the length is used when we calculate the
length of the cave. The total length of the cave is therefore 24439
meters. The length of the centerline is 25703 meters. We calculate
the length in Excel, and the depth in Therion.<br>
<br>
Normally, we do not exclude any length at proper crossroads
(share=1,0), meaning that we would have included the red parts in
the length of the cave in the crossroad example. Our argument to do
so is that a person has to walk that distance if he walks in the
center of the passage. (A cave is a 3D-void and, strictly speaking,
doesn't have any length, - but we humans would like to think that is
has ... :-))<br>
<br>
Regards<br>
<br>
Torstein<br>
<br>
Den 21.02.2012 21:17, skrev Maximillian Dornseif:
<blockquote cite="mid:1A112C80-BD92-4419-98C6-98A4D2620D6D@me.com"
type="cite">
<div>I might understand something wrong, but it seems to me, that </div>
<div>what is called `cavelength` in Therion is actually the length
of all centerlines.</div>
<div><br>
</div>
<div>This might correspondent to the cave length in straight caves
but certainly not in labyrinth like caves.</div>
<div><br>
</div>
<div>I was told about the "Kluterthöhle" in germany which was
surveyed in the 60ies to ca. 5900 m and then</div>
<div>resurveyed and recalculated - to have only a length of 5200 m
or so.</div>
<div><br>
</div>
<div>This is for on the one hand a problem with circular shots
inside big rooms, like <a moz-do-not-send="true"
href="http://filez.foxel.org/3s3H0d2X361A0K222Z3N">http://filez.foxel.org/3s3H0d2X361A0K222Z3N</a> </div>
<div><br>
</div>
<div>An other problem are crossroads like <a
moz-do-not-send="true"
href="http://filez.foxel.org/1t0C0r2Q011i0g1L0i00">http://filez.foxel.org/1t0C0r2Q011i0g1L0i00</a>
where you can't young the shared area of two passages twice but
must - at least to what I have been thought - deduct some part
of the centerlines: in the following picture I have marked the
parts being considered cavelength yellow and the centerlines not
counting as part of the cavelength red <a moz-do-not-send="true"
href="https://img.skitch.com/20120221-jhraj625isy8j1i9naxiki3b76.png">https://img.skitch.com/20120221-jhraj625isy8j1i9naxiki3b76.png</a></div>
<div><br>
</div>
<div>Certainly I'm not the first person stumbling about this.</div>
<div><br>
</div>
<div>What is the preferred way to approach the calculation of cave
lengths?</div>
<div><br>
</div>
<div>Regards</div>
<div><br>
</div>
<div>Maximillian</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><img alt="Image 2012.02.21 21:06:44.png" style="max-height:
516px; " id="14fe2421-6871-481f-ae7d-6df1bc45cd1f"
apple-width="yes" apple-height="yes"
src="cid:part4.05020702.05090803@gmail.com" height="238"
width="320"><img alt="20120221-jhraj625isy8j1i9naxiki3b76.png"
style="max-height: 516px; "
id="198bf454-a237-4631-adb7-316f3eebd1fb" apple-width="yes"
apple-height="yes" src="cid:part5.07040102.06030504@gmail.com"
height="245" width="240"></div>
<br>
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