I got the answer for rotation XVI file already from Stephen Clark.
In the end it's easy and as Alastair also mentioned:
export map -fmt xvi -proj [elevation 45 deg] -o ....

Concerning the questions from Bruce:
1. Ground profile
You have to export a kml file from your passages. But only these survey lines you would like to have the surface profile from.
There is a website where you can transform this kml data to surface data. You will get an endless list with stations and added surface altitude. The website is www.gpsvisualizer.com
I can't remember how to get the final file but there was still some work to do on that file.
In the end you need a file like this to generate a XVI file from that:
survey
centreline
date ....
   cs lat-long
   walls off
   mark temporary
   flags surface
   fix 1 44.1234567 1.345678 123.4
   .... more fix stations ....
   data nosurvey from to
   1 2
   2 3
   .....
endcentreline
endsurvey

2. Code for the surface line:
scrap
line wall -id surface_line -outline none -clip off
    ...
endline
line border -id lower_line -subtype invisible -clip off
    ...
endline
area u:surface_grey -clip off
    surface_line
    lower_line
endarea
endscrap

The code for area surface_grey is attached to this mail.
(I'm not realy sure anymore about all the "-clip off" !?)

3. Text boxes and layout changes
This is a bit more complex. I will put this infos into an extra email later.
Just give me some time to sort it out and to make it "readable" for everyone.

regards,
Torsten

Bruce Mutton <bruce@tomo.co.nz> hat am 25. November 2019 um 02:32 geschrieben:

I like your map Torsten.
I hope Alistair’s solution is what you were looking for.
I have some questions so that I might make such a nice map.
How did you obtain the ground profile? I presume you may have walked it with a gps to obtain ‘real’ survey data or extracted it from Google Earth.
I like the line you used for the ground profile. Would you share the code for that?
I like the layout of the text information boxes. Would you share an example of the code for those? (cave name, location, surveyed, thanks, exploration history)
Regards
Bruce

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