[Therion] Disconnected centrelines - Extended Elevation Control

[Bruce Mutton]

I am braving the creation of some extended elevations of some main routes
through a cave with a number of branches, loops, through trips and hopefully
to include a nearby cave.

Looking at the attachment First-Sample. I have an extended elevation that
traverses a number of centrelines, some in the direction of survey, some
against the direction of survey and one loop, which itself traverses a
couple of surveys.  It looks simple, but was a challenge, although it now
looks how I want it to.

 

Along the way to building it, there were plenty of times when there were
random offsets that I had no control over.  Although I have some insights as
to why that might have been, and think I understand extend start, ignore,
hide, there were plenty of times when it appeared that large offsets were
occurring for no apparent reason.

 

Anyway, the attached First-Sample. looks as I want it.

 

Now I want to add another very short cave, which is connected by a long
series of survey centrelines, although these centrelines are not to be part
of this elevation, so are not included in the centreline maps  I have
created.

 

See the attached 2caves-Sample.

The second cave, and small part of surface survey, should ideally be located
just to the right of the main elevation, because that is where, in reality
there is a small gap between them.  There is no survey of the gap of course
- the survey goes around the long cave passages and surface to get there!
(And there are gps fixed stations as well, so the surveys could potentially
be disconnected, but that might mess with the plan maps - as usual there is
a bit of misclose!)

 

I have tried using a start statement for each, and a start statement for
only one of them.  This has no effect, and even if it did, there is not much
chance it would produce the result I wanted.

 

Is there a way to control the starting location of this second piece of
(disconnected) centreline?

 

Bruce

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20170408/150c8da3/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 2caves-SampleElevEXTMap.pdf
Type: application/pdf
Size: 111518 bytes
Desc: 2caves-SampleElevEXTMap.pdf
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20170408/150c8da3/attachment.pdf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: First-SampleElevEXTMap.pdf
Type: application/pdf
Size: 89551 bytes
Desc: First-SampleElevEXTMap.pdf
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20170408/150c8da3/attachment-0001.pdf>