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I wonder whether the cavelength discussed here (or perhaps sum of
Passagelength) is, more or less, the same as the sum of the length
of the walls divided by two. If yes, I wonder whether it is possible
for Therion to calculate the length (3D) of the walls in the
scraps/map. <br>
<br>
Actually, there are several morphometric values that would be very
interesting, - if Therion could calculate them. For instance the
horisontal passage area of the scraps/map and the volume of the
cave. <br>
<br>
Btw, I could find any attachments.<br>
<br>
Torstein<br>
<br>
<br>
<br>
Den 04.03.2012 08:46, skrev Maximillian Dornseif:
<blockquote cite="mid:E9252949-2C4D-42C7-AD80-C7A31B6E8836@me.com"
type="cite">On 2012-03-04, at 01:22, Bruce wrote:<br>
<br>
<blockquote type="cite">You would have to bear in mind the
definition of cave length that you want to adhere to when
surveying the cave, and choose stations accordingly. The legs
that do not contribute to length would be flagged as duplicate.<br>
</blockquote>
<br>
<div>Any suggestion how to integrate that nicely into the data
format - be it for therion itself, be it for post processing.</div>
<div>Generally what would help a lot is a way to say "of this leg
4.50m long only 3.50m should be added to the cave length.</div>
<div><br>
</div>
<div>This can be done within Therion today via</div>
<div><br>
</div>
<span class="Apple-tab-span" style="white-space:pre"> </span>flags
duplicate<br>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>P144<span
class="Apple-tab-span" style="white-space:pre"> </span>P147a<span
class="Apple-tab-span" style="white-space:pre"> </span>252<span
class="Apple-tab-span" style="white-space:pre"> </span>-2<span
class="Apple-tab-span" style="white-space:pre"> </span>1.00<br>
</div>
<span class="Apple-tab-span" style="white-space:pre"> </span>flags
no duplicate<br>
<div> P147a<span class="Apple-tab-span"
style="white-space:pre"> </span>P147<span
class="Apple-tab-span" style="white-space:pre"> </span>252<span
class="Apple-tab-span" style="white-space:pre"> </span>-2<span
class="Apple-tab-span" style="white-space:pre"> </span>3.50</div>
<div><span class="Apple-style-span" style="white-space: pre; "><br>
</span></div>
<div>But this seems to be very error prone. An alternative would
be to use an external program to determine cave length and just
encode the information in the therion file. E.g.</div>
<div><br>
</div>
<div><br>
</div>
<span class="Apple-tab-span" style="white-space:pre"> </span>flags
duplicate<br>
<span class="Apple-tab-span" style="white-space:pre"> </span>P144<span
class="Apple-tab-span" style="white-space:pre"> </span>P147<span
class="Apple-tab-span" style="white-space:pre"> </span>252<span
class="Apple-tab-span" style="white-space:pre"> </span>-2<span
class="Apple-tab-span" style="white-space:pre"> </span>4.50 #
length:3.50
<div><br>
</div>
<div>But this would mean not only parsing therion files but also
parsing comments. Any suggestions how to incorporate such data
with maximum clarity and comparability? <br>
<br>
</div>
<div>I'm unsure it will ever be possible to automatically extract
cavelength in complex caves - see attached examples.</div>
<div>The "small reduction in length" was about 16% length
reduction for the "Kluterthöhle" shown in the second attachment.
And to my understanding all organized Austrian & German
caving is basing their calculations today on the Trimmel method.
Perhaps that is the reason therion sees relative little use (<a
moz-do-not-send="true"
href="http://therion.speleo.sk/wiki/doku.php?id=projeurope#">http://therion.speleo.sk/wiki/doku.php?id=projeurope#</a>)
in german speaking countries?</div>
<div><br>
</div>
<div>I'm not complaining. But I would be very grateful for
guidance how i can integrate cave length calculation with
minimal fuss and thus keeping the data in *.th files in a state
where they document our surveys and are not full of hacks which
nobody will be able to understand 25 years from now.</div>
<div><br>
</div>
<div>--md<br>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><img moz-do-not-send="true"
id="35247592-47cb-40a2-b049-381058d926fd" apple-width="yes"
apple-height="yes"
src="cid:A12A9DE5-457E-4FE7-8004-F7448B1A90CB@fritz.box"
height="240" width="250"><img moz-do-not-send="true"
id="9d320bff-220f-4043-b3ec-b90feb9fe4a0" apple-width="yes"
apple-height="yes"
src="cid:C565DE80-5F22-4F65-BB5E-10BC29F60195@fritz.box"
height="145" width="320"></div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
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</pre>
</blockquote>
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