> I'll add the gpsvisualizer to the Therion wiki, as it looks like a
good way to get a smoothed ground profile over a cave centreline. >Just
so I'm clear, did you just upload your therion generated kml file here?
Yes, I used the 'model' version of the .kml file, with the x, y
centreline coordinates. For the output, I just copy and pasted from the
website text box, added station names in excel and pasted back into
therion as fixed stations. The only issue I have noticed is that you
seem to get an extra point at the end of the dataset that is back at the
start of the path.
I think I understand the map & survey structuring a bit better now.
Thanks for the links. I can see I need to create a scrap for the surface
to make it visible. My structure, albeit non-existent, wasn't the problem!
I have used the following process to add the ground profile to both the
extended and elevation pdf projections:
Export a .kml model of the cave centreline
Import to gpsvisualiser to add the ground altitudes to each co-ordinate
Create a new centreline survey with fixed stations for this set of lat,
long, alt coordinates
Export an .xvi of this survey
Import the .xvi into therion graphical editor
Create a scrap, referencing some of the stations
Trace the stations with a line (I have currently used 'walls', but I am
open to suggestions for a better line to use?).
Include this scrap and the centreline survey in the exported map.
Sample work-in-progress here :
https://dl.dropboxusercontent.com/u/4064739/draft_extended_04sep2013.pdf
From a cave diving perspective, it would be useful to add local zero
depth lines using a similar process. Is there an appropriate line type
to use for this?
Steve
Martin,
Picking points from GoogleEarth works very well. Thank you for the
suggestion. I found a very useful tool here :
http://www.gpsvisualizer.com/elevation
By simply importing the .kml file of the cave centreline data
(lat-long), this online tool will create a list of coordinates including
the ground altitude at each point from one of it's datasets. Very easy
to use and copy-paste the data back into therion as fixed stations. I
imagine it would be easy to extract a full DTM surface grid using this tool.
Bruce,
Your suggestion worked great. It is a little odd when used in extended
projection, but seems correct in elevation projection.
I do have a bit of a problem in exporting to pdf, and this may be me
missing something more fundamental in how survey/maps are structured and
therion builds up the plot :
When I just plot centreline data, I can see cave centreline and the new
ground surface centreline for the complete cave length. When I include a
single cave scrap, I no longer see any centreline data outside this
single scrap. Is there a way to over-ride this behaviour or
alternatively how should I structure my survey/map objects to avoid this?
Thanks to all for your help,
Steve
When doing the build the samples processing gets as far as the
'survex' folder and things go wrong:
therion 5.3.11
initialization file: /etc/therion.ini
reading ... done
configuration file: thconfig.1
reading ... done
reading source files ... done
preprocessing database ...
therion: error -- file import -- cave1.th [11] -- unable to open file
cave1.th definitely exists. why would 'source cave1.th' fail?
ownership and permissions are OK
running therion thconfig.1 again produces the above output.
similarly in the survex/use dir:
therion 5.3.11
initialization file: /etc/therion.ini
reading ... done
configuration file: thconfig.1
reading ... done
reading source files ... done
preprocessing database ...
therion: error -- file import -- cave1.th [11] -- unable to open file
source foo.th has just worked fine in q-marks and pocket-topo and
morphing/sample1 etc. I am perplexed.
Wookey
--
Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM
http://wookware.org/
Here are the pics marked up
On 4 Sep 2013, at 11:00, therion-request(a)speleo.sk wrote:
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> 1. Re: Extend (Bruce)
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>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 4 Sep 2013 07:16:30 +1200
> From: Bruce <bruce(a)tomo.co.nz>
> Subject: Re: [Therion] Extend
> To: 'List for Therion users' <therion(a)speleo.sk>
> Message-ID: <35221100083446CEA6934D820E5BB553@JUICEBRAIN>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi Dave
>
> Can you repost with labeled diagrams please?
>
> Bruce
>
>
>
>
I'm totally confused about the use of extend. I understand right and left reverse but the hide and ignore are puzzling me.
I have a cave which has three entrances with their passages all converging at a common point. I want to show an extended elevation from only one of the entrances and ignore or hide the other two passages.
I've created a simple example of what I want to do.
This is what I get without any modifier. Exactly what I expected.I want to hide the passage at the top (stations 1 to 2 and 2 to 5).
centreline
extend left
0 1 10 90 0
1 2 10 45 45
2 5 5 90 0
1 3 10 90 0
3 4 10 100 0
endcentreline
test 1
The manual says
extend <spec> [<station> [<station>]] ◃ control how the centerline is extended.
ignore ◃ ignore specified station (shot), continue extended elevation with other station (shot) if possible
hide ◃ do not show specified station (shot) in extended elevation
Presuming that (shot) would refer to the two stations 1 to 2 I tried
centreline
extend left
0 1 10 90 0
extend [hide 1 2]
1 2 10 45 45
2 5 5 90 0
1 3 10 90 0
3 4 10 100 0
endcentreline
but got the error therion: error -- test.th [5] -- unknown extend flag -- hide 1 2
I then read the manual again and tried
…
extend hide 1 [2]
...
This time I got
test 2
Not what I expected. The two lines at the top are shots 5 -2 and 1 - 2. I understand why 5-2 might still be there but not 1-2 and why is there no vertical element to 1-2?
I tried again using ignore instead of hide and got the same as test 1.
I then tried
…
extend hide 1
...
with this result
test 3
Changing hide to ignore gives the following result.
…
extend ignore 1
…
test 4
So, I have two questions.
1. How do I hide or ignore the side passage
2. What is the logic behind the results I get.
Dave Clucas
daveclucas.commycaves.org.
daveclucas(a)icloud.com
[re-sent due to email address error]
I am looking for some advice on the best way to add the profile of the
ground surface to a cave elevation (for pdf export). Apologies if this
is in the book and I've missed it.
Currently, I have the background colour as a light grey, with cave the
foreground in white. This works well, is easy to read and looks good.
Sample section here :
https://dl.dropboxusercontent.com/u/4064739/draft_section_18may2013.pdf
Assuming I can draw the ground profile, is there a simple way to change
the colour above the ground (i.e. the sky) to white too?
If not, and it's better to make everything white, what is the most
consistent way to draw the ground profile as a line in a scrap? Should I
be using a 'walls' line but inside-out or is there a better/correct way
to do this?
Any help much appreciated,
Steve
