[Therion] "missing" surface leg

[Bruce]

>The caves are linked by a surface leg across the depression. This leg is 
>flagged as surface. On the 3d file that seems fine, but on the lox file 
>the image shows a defined passage where the surface leg should be.

Loch has always been well behaved for me in this respect as far as I recall
I always have 'walls auto' set in my low level survey files, not sure if
that is relevant, just a habit I have that could bias my outputs.  I will
admit to not checking *.lox too carefully until I have a reasonably complete
survey and drawing setup.
Do you have any scraps defined for the caves either side of the surface leg?
Do you have any LRUD data?
If no LRUD are all legs collected 'paperless' with splay shots a well?
Are you sure therion is recognising the surface leg? (export survey-list etc
to find out)

These are aspects that seem to impact on some default behaviours of Loch.

Bruce

[Therion] Training Course Guide for Therion from the UK Cave Surveying Group

[Marco Corvi]

footleg, 

i read your tutorial three times, and i agree with bruce.


i'm probably not completely new to therion, so i'm sort
of biased judging it, but,to me it is a very good intro to therion.

there is an emphasis of getting the cave data from distox.
this means to skip talking about the data-entry in xtherion, 

for instance. as well as other things.

but it's in the title that it is about therion AND distox, ...
and it makes sense, as it is something for the course you have
mentioned.

one thing in your tutorial made me think about:
you define a map even when there is one single scrap.
from therion book, this is not necessary, as therion
outputs the scraps of the survey if there is no map.
i must say that i use to do the same: whenever i have a scrap
i define a map for it.
next you add the second scrap to the map and must put in the 

"break". following my habits i  would have defined a new map
with the two scrap' maps ...

and i found that with the two scraps the break is needed, with
two maps there is no need for it. and much more about map
arrangements which is beyond this mail topic.

now i have a question (for anyone, not just footleg):
when is it better to use a map with two scraps, and when a map with
twp maps?

by the way, 

footleg, it's really a great tutorial. 

looking forward to see it complete.
marco





 From: Bruce 
To: 'List for Therion users'  
Sent: Saturday, June 16, 2012 12:20 AM
Subject: Re: [Therion] Training Course Guide for Therion from the UK Cave 
Surveying Group


>Already I was unhappy with the way I introduced additional scraps in
>this training guide because it is not a simple case, and jumps in too
>much at the deep end. ...

>So the plan is to split off this guide on starting from actual DistoX
>data to cover the workflow of getting the data from PocketTopo into
>Therion, and write a more general Therion Tutorial starting with some
>more illustrative data and building up from the basics to more
>advanced concepts. The first guide will lead into the second to turn
>the beginner into an expert! 

Footleg, I really like the pace and style of your initial guide.  In a
straight forward way it gets the student to a real map and model in only a
few steps.  For me it is the key point of difference to what we have
already.  So don't make your revision too detailed or too comprehensive in
the introductory lessons. (Subject to live testing on Therion novices of
course) 

Bruce

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