CUCC Expedition Handbook - New Survex file

Creating a new survex file

Great, I have discovered a new cave...

If you have not come to this page from the sequence starting at Starting a New Cave" then go and read that first.

  • This page outlines the next step of the process. Each part of it is documented separately.

    Process

    Typing in the survey data in survex format

    [This has been described in several places and we are in the process of consolidating the documentation and getting rid of out of date notes.]

    The survey data typed up must include all the notes, including station details and passage names. Make a backup copy to another machine or USB stick as soon as you have typed it in. New users will be using the expo laptop to create the .svx file and you will put it in the folder

    /home/expo/loser/caves-1623/264/mongolrally.svx
    
    and tell someone nerdy when you have finished and they will ensure that it is saved, committed, and pushed appropriately.

    If you have several parts of the cave surveyed on one trip, create several distinct .svx files.

    Once you have created the .svx file you will run survex to generate a centre line, transcribe your sketches onto that paper, scan it again and then digitise into tunnel or therion.

    [Nerds: survex cave data belongs in the repository "loser", e.g. loser "caves-1623/264/mongolrally.svx". We are assuming that normal users have never worked with an distributed version control system at this point which is why we are only telling them to use the expo laptop.]

    Entering the QM data

    QMs are the unexplored leads, they are Question Marks because we don't know where they go to. There is a specific format for recording them in survex files.

    Read this separate description about entering the QM data into a survex file.

    Entering the cave description in the survex file

    The last part of the survex file is a description of the passage surveyed. Remember that this is intended to be read by people who have not been to that bit of the cave themselves ;------------
    ;Cave description ;(leave commented-out)
    ; See 2017 description for details of GSH up to the 'p50'. Briefly, on the way to couldashouldawoulda a 22 m entrance crawl from the surface leads to a climb down and a junction. Left leads to easy c rawling passage for a short distance, then another junction where traversing over a shallow hole and down a stooping-height sandy passage to a sharp left turn and a sandy, easy 'squeeze' leading to a straighforward p10.
    [from couldashouldawoulda_to_bathdodgersbypass.svx]

    Note that the description is often written as one long line. Use the word-wrap capability in your editor to make it easier for yourself.


    Back to the previous page in this sequence Creating a new survey wallet.
    Now go the the next page in this sequence Drawing up your survey.