[Therion] Hopefully a bunch of new users

[Bruce Mutton]

> I demonstrated Therion to our local caving club a couple of days ago...

>Fantastic! I've been thinking of doing the same thing with my club. If
>you don't mind my asking, how exactly did you give your presentation?
>Did you just show how it's used, or did you go more in depth?
>-Jonny ^v^

Started with showing a bunch of outputs for the cave system I've been
working on;
-Loch model with 3 caves, terrain model & surface image
-SQL and 'continuations' outputs
-A bunch of pdf map and atlases including surveyed caves, old scanned cave
map and surface image.

Then went very broadly and briefly through the process demo-ing the actual
input files for the above outputs, 'scan data format', xvi-draw or
print_atlas-sketch-scan-trace_scraps drawing alternatives, drew a new bit of
passage, had a compile error I couldn't solve on the fly, INDEX files to
link it all together and thconfig files to obtain output, and answered
questions.  

A couple of people have taken away my data for the cave system, and hope to
use it as a template to draw up some projects they have... which brings me
to the single biggest hurdle that continues to dog me with Therion - how to
arrange ones data?  I realise there's probably about 50 good ways to do
this, depending on ones needs and expectations, and some are described very
vaguely in the documentation.  I think I'm heading towards a reasonable
strategy that's scalable from single caves to 60km systems with numerous
small surficial caves nearby.  When I've got the bugs ironed out I'll see if
I can get something into the Wiki.  Probably in the form of some actual
data, suitably scrambled so that it does not reflect a real cave, and with
commonly used statements pre-entered and commented and well documented.

If anyone has already documented a Therion data management system I would be
most interested.  There was nothing specific enough on the Wiki when I
looked a few months ago - may be better now, I notice there is some nice
content on surfaces added recently.
Bruce