HI Bill,

Something along the lines of
map ProblemchamberMP
GrandcanyonSP
FlatroomSP
endmap

select Problemchamber
export map -proj plan -o Problemchamber.th2

Instead of exporting to pdf, this will then export this to a .th2 file, where I guess it will appear with all the lines you have joined, instead of you having to join them with line joins/scrap joins or amending line end positions to force therion to automatically recognise them.

This will allow you to work on the whole chamber as one in a single .th2 file.

Of course then (more or less) in your master file you will have
survey StarkCaverns
input problemchamber.th2
input otherpartsofcave.th2

map StarkcavernsMP
PromblemchamberMP
OtherpartsofcaveMP
endmap

centreline
equate ...
endcentreline
endsurvey

This should hopefully reduce the overlap you are seeing in your current workaround, and it's probably still possible to implement this and delete the invisible walls from the centre of your chamber.




Regards,
Al
From: Bill Gee <bgee@campercaver.net>
Sent: 03 August 2023 15:37
To: alastair gott <alastairgott@hotmail.com>
Subject: Re: [Therion] Big room multiple scraps - How to join
 
Hi Alistair -

I am not sure I understand what you are suggesting.  It sounds like  the
idea is to use something like GIMP to collect all of the sketches for
the room into one JPG file, then use that file as the background for
Therion.

True?

I considered that idea.  There are two problems.  First, I know almost
nothing about GIMP.  It would be a steep learning curve.  Second, the
sketches are not all the same scale.  Some of them would have to be
shrunk.  Again a GIMP task, and beyond my knowledge of how GIMP works.

===============
Bill Gee

On 8/2/23 12:16, alastair gott wrote:
> Hi bill,
>
> Could you set up a map for just that chamber which will then join all
> the sketches and export the .th2 for it. When you then subsequently
> export that .th2 to pdf, you do not need the joins and therefore do not
> lose any of the detail.
>
> Regards,
> Alastair Gott.
>
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> *From:* Therion <therion-bounces@speleo.sk> on behalf of Bill Gee
> <bgee@campercaver.net>
> *Sent:* Wednesday, August 2, 2023 4:28:05 PM
> *To:* Therion Mail List <therion@speleo.sk>
> *Subject:* [Therion] Big room multiple scraps - How to join
> Hello everyone - I am having a problem getting Therion to understand how
> to join several scraps to make a large room.  The working map is at
>
> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcampercaver.net%2FMiscFiles%2FStarkCavernsNoCenter.pdf&data=05%7C01%7C%7C13afc0601da0489ee6ad08db942f3937%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638266702773179124%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=JaEkdo9ILBvbQ%2FBvVAopbYGXV5ODrdNV9WTWBT3MNLk%3D&reserved=0 <https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcampercaver.net%2FMiscFiles%2FStarkCavernsNoCenter.pdf&data=05%7C01%7C%7C13afc0601da0489ee6ad08db942f3937%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638266702773179124%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=JaEkdo9ILBvbQ%2FBvVAopbYGXV5ODrdNV9WTWBT3MNLk%3D&reserved=0>
>
> Take a look at the east part of the map in an area called Grand Canyon.
> This is really one large room, though we did not realize that when we
> started sketching several years ago.  Now I have at least three
> different pieces of sketch to try and fit together.
>
> As you can see, there is a large triangle in the center which Therion
> thinks is not cave.  There are also some part which are outside the
> cave, but are considered by Therion to be inside.
>
> All of the joins in here are using line-to-line.  I named the lines,
> then created "join" statements specifying the two lines and which points
> on those lines to join.  Therion is happy with that, and the wall that
> it draws is a fair depiction of the area.  The problem is that much of
> the interior is getting lost.
>
> I have not tried to use plain joins of the scraps - joins which do not
> specify the lines.  I suspect that would not change much.
>
> I have already drawn some of this area three times.  It is
> extraordinarily complicated due to multiple levels, especially along the
> east side.  We thought for a long time that the east side was separate
> passages, but it is really just a complicated pile of big breakdown blocks.
>
> I really REALLY do not want to go back and make one huge sketch of the
> entire room.  That would take several days.
>
> What can I do to convince Therion where the cave really is?  Can I put
> in some invisible walls (subtype hidden)?
>
> Thanks!
>
> --
> ===============
> Bill Gee
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