[Therion] Best practice - orientation of original sketch?

[Bill Gee]

Hello everyone -

I started this thread, so I think I need to jump in with some additional comments!  
:-)

For me, the starting point for the discussion is a project I am working on where 
there will be multiple maps produced from the same sketch data.  I am doing a 
set of maps in Therion, and another person (who is also the project manager) is 
doing a set using Xara/Walls/Compass.

I and two other sketchers have turned in drawings oriented so as to fit 
maximum passage on the page.  In some cases sketching at 1 inch = 20 feet, it 
is not possible to fit the sketch on the page unless north is some direction 
other than up.

When the project manager scans the sketches, he always scans them with 
up=north.  That makes it easier for him to lay out the backgrounds in Xara.  
However, it also means that comments, cross-sections, elevation profiles etc. 
are not "right-side up" for reading.  He is immensely bothered by this, and so 
has asked all of us doing sketch to always make up=north.

I have not agreed to this because 1) I think it is not necessary and 2) It severely 
restricts how much cave I can get on a sheet of paper.  Since I am no expert at 
cave survey, I decided to go to the group and see what other people think.

As others have commented, Therion does not care what the orientation of the 
background sketch image is.  As long as there are two or more survey stations, 
Therion will rotate and align things as needed.  Cross sections can be rotated 
by the alignment of the scale line, and elevation profiles usually have survey 
stations in them.  I can easily read notes in most orientations, and if it is a 
problem then I can open the background image in a regular image viewer and 
rotate for reading.

Martin's comments here and on the Therion web site illustrate that there are 
considerations regarding map rotation.  If the map is produced with north <> 
000, then some things will be off.  Embedded images are among them.  My 
solution is to choose a map rotation early and stick with it, and also to not put 
images on the map until almost the last step.

Bill Gee


On Saturday, December 26, 2015 09:11:51 Martin Sluka wrote:
> > 26. 12. 2015 v 5:53, Bruce <bruce at tomo.co.nz>:
> > 
> > but usually I will have many more than n scraps for reasons unrelated to
> > the number of scans/sketches.
> 
> Bruce, you are right, but I was answering to Wokey. It looks he has several
> sketches oriented to North and one or two oriented differently. So I wrote
> him to just make separate scraps from that sketches. Therion will rotate it
> appropriately.
> 
> Martin
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