[Therion] Drawing the map of a vertical cave

[Xavier Robert]

Hi Jean-Florent,

I also had this issue in some caves in Haute Savoie (France). Generally, to avoid this issue, I separate the survey in several sub-surveys corresponding more or less to a small horizontal level, and I draw each subsurvey separately. Then, this is not hard to merge everything together. You may have a look on https://github.com/robertxa/Topographies-Samoens_Folly to get examples on how to separate surveys and merge them.
I also use a lot the 3D view with Loch to be sure about the station to be taken in account.

To share the 3D view with other people, I am using the Caveview web-app. The great point is that as soon you already have a model on line, if you share a lox file, you can tell your contacts to just grad-and-drop the new lox file in the Caveview window: it will load the local lox file you sent.

Cheers,

Xavier



> Le 29 janv. 2025 à 10:15, Jean-Florent Raymond <jeanflorent at no-log.org> a écrit :
> 
> Hello,
> 
> Thank you all for your answers ! So there is no easy way.
> 
> Yes indeed the elevation drawing is much easier to read in this case and was also much easier to draw. But I cannot resign myself not to draw the plan, which is useful to guide the exploration. (For instance it might reveal that that one chimney is located just below the base of a pit above, in which case we probably won't waste time to climb that chimney.) The 3D view is even better for that but quite hard to print on paper :) and more generally hard to share with people who are not too familiar with computers.
> I will try some of your suggestions.
> 
> Best regards,
> Jean-Florent.
> 
> 
> Le 28/01/2025 à 19:31, Bruce Mutton a écrit :
>> Hi Jean-Florent
>> As Tarquin said!
>> However solutions I have used to good effect...
>>  If your data is pencil and paper, then printing and sketching on paper
>> (while viewing models, plan and elevation on-screen simultaneously) then
>> scanning those sketches can be an easier way of untangling.
>> Or break the survey into small sections of survey that only minimally
>> overlap, and export one at a time for eventual sketching.
>>  If your data is paperless, then the best option is to anticipate this while
>> in the cave - if it is becoming hard to decipher in the cave on your device,
>> then it won't be better in XTherion.
>> In this case, create a new survey file.
>>  In both cases, limit the scope of your xvi only to the individual survey.
>> Good luck!
>> Bruce
>>  PS: Perhaps a key thing to remember is that if the plan is becoming
>> difficult, an elevation drawing will be a better way of conveying to viewers
>> an understanding of the cave.
>> (An example of a 5 or 6 level shaft spiral that is somewhat OK in plan)
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