[Therion] The goal with joining scraps

[Bruce]

I have found I only need to join scraps when they are not contiguous (ie
each line entity, such as walls that continue across the 'join', are not
'snapped' together) within the same th2 file.
ie if the scraps are not drawn touching each other in the same th2 file, a
join is helpful, or
if adjacent scraps are in different th2 files a join is helpful, or
in any situation where there the drawing is not proportional to the survey
network the morphing may cause walls to pull apart, and so a join will be
helpful, or
as Martin indicated, complicated multi-passage junctions.

My recollection from my own datasets is that the join transformation acts
equally on map and model outputs (I would be concerned if different export
types gave different shapes).  If the scraps give a clean join without any
explicit join statement, then I do not use it, as that just results in
unnecessary complexity, and no change in the output.

If you make future changes to a 'joined' scrap, it is a good idea to comment
out the join temporarily, otherwise the local morphing caused by join
statement will mask you edits, making for a very confusing time.
Bruce


-----Original Message-----
From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
Of torstein finnesand
Sent: Tuesday, 25 August 2015 4:36 a.m.
To: therion at speleo.sk
Subject: [Therion] The goal with joining scraps

Hi folks, some questions about the join command.

We join scraps to make nice pdf-maps or other two-dimensional maps like 
svg, xhtml and kml. Of course, this is a very good reason.

1. But are there other reasons to do it?
For instance, do joins have any influence on other exports, like the 
maps (walls) in aven or the models in loch? I did a simple preliminary 
test, and couldn't find any difference whether the scraps were joined or 
not.

2. Do you always joins the scraps?
Are there some situations when its not necessary, or even wrong, to join 
scraps?

Torstein Finnesand
Norway
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