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246 lines
9.8 KiB
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<!DOCTYPE html>
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<title>CUCC Expo Surveying Handbook: Entering data</title>
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<link rel="stylesheet" type="text/css" href="../../css/main2.css" />
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</head>
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<body>
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<h2 id="tophead">CUCC Expo Surveying Handbook</h2>
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<h1>From muddy book to survex plot</h1>
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<div class="onright">
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<a href="../../piclinks/typing.htm"><img src="../../tinypix/typing.jpg"
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width="176" height="115" alt="" /></a>
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<p class="caption">Tony Rooke entering data (1991)</p></div>
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<p>Survex has its own documentation for the format of the data, though the
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template file and a look at someone else's data will quickly make this
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fairly clear.
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<p>Survex has some very flexible data entry options, so there
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are a few extra guidelines to try to get some consistency in the way
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everyone uses it within this project.</p>
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<p>Survex (including the graphical software 'aven') is already installed
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on the expo laptop. These instructions assume that you are using the expo laptop.
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<h3>Where to put your data</h3>
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<p>Where to put your data: <b>If in doubt, ask!</b>. These instructions assume
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that you are typing it in on the <em>expo laptop</em>. (You can do it fom your own
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laptop if you have been initiated into the deep magic of the "loser" repository
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of the distributed version control system - see the
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<a href="../manual.html#repositories">list of repos</a>.
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<ul><li>If it is a surface
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survey, it goes in the "surface" directory;
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<li>if it is a file of fixed points
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(like GPS fixes, or map coordinates), it goes in the "fixedpts" directory;
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<li>if
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it is a new cave on the near-plateau, put it in a new directory under "caves-1623".
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</ul>
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<li>Underground data for Steinbrückenhöhle goes in one of the
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subdirectories under caves-1623/204; it may well be clear which one from what it
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links to, but if not, ask.</p>
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</li>
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</ul>
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<h3>Use a template</h3>
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<p>It will be easiest if you start from one of the existing template files,
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as these have lines to remind you to add various details - make sure you
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don't leave any blanks! Copy <em>and rename this</em> to where you want to put your data
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<em>before</em> editing it. Too many people have overwritten the
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template in the past, try not to do this yourself.
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<h3><a id="filenames">Filename and data-entry conventions</a></h3>
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<ul>
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<li>Use Unix line endings (i.e. \n not \r\n).
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<li>Use UTF-8 character encoding.
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<li>Cave numbers are written without any leading zeros at all (in filenames,
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survey names, or anything else!).
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<li>Entrances have station names such as p204b. In the event of the tag
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location being different from the entrance location, the tag point
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should be named with a "t" instead, e.g. t204b.
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<li>No full stop (.) characters in station names.
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<li>All filenames to be in lower case. Capital letters in filenames can still (in 2018)
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cause hassle when moving between Linux and Windows.
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<!-- I think we can dispense with this now - DL
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<li>Filenames: Because Survex is used on different sorts of computer, it is
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best to use filenames which won't get changed when the files are moved
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between systems. On a PC this means using xxxxxxxx.SVX, where "xxxxxxxx" is a
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name of letters, numbers and maybe the underscore character, with a maximum
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length of eight. On an Acorn machine, the equivalent filename is
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"xxxxxxxx/SVX", and should have a filetype of "Text". Note that this must be
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kept in an image filing system such as SparkFS (.ZIP), X-files or DOSFS
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(which is most logical) to avoid truncation. I know Windows lets you have
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long meaningful names, but these tend to get lost on DOS floppies, or when
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moved to other machines. For directories (=folders), use a maximum of eight
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characters with no extension.-->
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<li>No filenames starting with "-" or "!".
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<li>Caves with a provisional number consisting of a year and a serial number
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should be <em>hyphenated</em>, thus 2018-ad-01 not 2018_01 or any of the various other
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variants.
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</ul>
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<h3>The name of your survey</h3>
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What to call your survey: all your data should be inside a begin/end pair
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with a meaningful name. This need not be the same name as the file, but as a
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general rule it should be so unless there is a really good reason not to. On
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the other hand, if you have made two or three trips to the same cave,
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it can be a good idea to nest surveys in one file:
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<pre><i>File 2050-01.svx</i>
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*begin 2050-01
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*export pt1.1 pt2.5 [...]
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*begin pt1
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<i>[survey data from first trip]</i>
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*end pt1
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*begin pt2
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<i>[survey data from second trip]</i>
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*end pt2
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*end 2050-01
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</pre>
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or you can create several .svx files.
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Creating several .svx files seemsto be current practice as it
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simplifies the manual process of knitting several different people's trips together.
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<p>There is no restriction on the length of these names, but as they can be
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displayed in aven, tunnel and other such programs, it helps not to have
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anything too elaborate. Older versions of survex required each prefix to be
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unique in its first eight characters, and this is not a bad guideline to
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follow.</p></li>
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<h3>Station names</h3>
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<p>Every station should have a number <em>within your survey</em> even if it
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is an existing station to which you have connected. Any survey stations which
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you think can reliably be found again should be listed at the start of your
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survey file. This includes the name (within your survey) of any existing points
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you linked into. I have used lines like <tt>;*export mysurvey.pt1.0 ; 2nd bolt at
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head of new pitch</tt> – this may or may not catch on as a standard.</li>
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</ul>
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<p>At this stage, you have done enough to get a centre line for drawing up.
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If you aren't completely confident about the structure of the Austria data, or
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the survex syntax of <tt>*equate</tt> and <tt>*export</tt> which can be rather
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cryptic for the uninitiated, it may be best not to try to link your survey to
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everything else so skip the next bit and read on <a href="#concrete">from
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here</a>.</p>
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<p>However, if you need to see your survey in relation to the rest of the
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dataset:</p>
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<ul>
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<li>Don't put any *equate directives to other surveys into your file (or any
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survey legs which quote station names from other survey files). Instead, go to
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the file which *includes the other files in the same area. <br><br>
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For example, if you
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have created a file trivial.svx in the caves-1623/204/deepsouth directory, go to the
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file deepsouth/deepsouth.svx, where you will find *include lines for each of
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the files, together with the *equate lines to connect them together. Add an
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include for your file, and *equate lines for each of your survey stations which
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is the same as one in another survey. If your survey connects to points in
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surveys in files in more than one directory then the *equates should go in the
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/204/204.svx file, but at this stage it is probably worth enlisting the help of
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someone who knows the structure of the data inside-out! <br><br>
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<li>You should now find that if you run survex on one of the master files
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(all.svx, 204.svx, smk-system.svx, etc.) which includes the area of
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your new survey, it is linked in and will show up when you use the resultant
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.3d file in vven. Using 204.svx should give info on how long and how
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deep the cave is now.</li>
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</ul>
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<p>Now you have been typing this on the expo laptop, and before you let someone
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else use the laptop you need to find a nerd to do the deep magic to add your
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file to the version control repository "loser". Watching the nerd do this is
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usually your first initiation into learning how to do it yourself.
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<h3 id="concrete">Example svx file</h3>
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<p>To make that all a bit more concrete, here is a
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fictitious example of a survey off Swings & Roundabouts in 204. Let's say
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that you went to explore a lead from the QM list numbered 2002-99, that the
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nearest survey station was listed as 204.allswings.swings5.2 and you found it
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successfully, and numbered it within your own survey as station 0. Then you
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might create the following file: (note we don't use umlauts)</p>
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<!-- Stolen, with apologies to Martin and Lucia, from
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caves/204/swings/ermintrude.svx. -->
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<pre><i>File wibble.svx</i>
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*begin wibble
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; Locn: Totes Gebirge, Austria - Loser/Augst-Eck Plateau (kataster group 1623)
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; Cave: Steinbruckenhohle
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*title "Wibbled by Goesser"
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*date 2004.08.32 ;date the survey was done
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*team Insts John Doe
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*team Notes Jane Doe
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*team Tape Jane Doe
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; ref.: 2004 #999 ; the #number is on the clear pocket containing the original notes.
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; ====== stations refindable to link to other surveys: ======
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*export 0 ; list all exported survey points.
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*calibrate tape 0 ; +ve if tape was too short, -ve if too long
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;calibration data 148,+23,147,+23.5,148,+23,329,-23,328,-23.5,328.5,-23
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;from to tape compass clino ; remarks
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1 p5 5.48 181 -27
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<i>[and the rest of your survey data]</i>
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6 5 5.66 - DOWN
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;stn L R U D Desc
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;1 0.7 0.4 0.3 0.5 RP top of boulder
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<i>[and the rest of the station details]</i>
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*end wibble
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</pre>
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<p>That lot would be typed by copying caves-1623/204/template.svx to
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caves-1623/204/swings/wibble.svx and then filling in the blanks and adding your
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data. If you are linking to the rest of the survey then in the file
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caves-1623/204/swings/allswings.svx add the lines:</p>
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<pre>
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*include wibble
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*equate wibble.0 swings5.2
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</pre>
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<p>Remember not to put surface data and underground data in the same file,
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even if they are part of one continuous survey. You need to create two
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files, with a defined station for the entrance, and a suitable equate in
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the file which includes both surface stuff and underground stuff.</p>
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<!-- Did whoever surveyed bogenhoehle read this? -->
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<p>Once you have your data typed in and checked, it must be run through the
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survey software (which on expo will be <a
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href="http://www.survex.com/">survex</a>) and a centre line printed, both for
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plan and for extended elevation. Measure the print out to check that it really
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has printed at the scale you wanted (typically 1:500), as this has sometimes
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caused problems in the past.</p>
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<p>Now see the "<a href="drawup.htm">Drawing it up</a>" page.</p>
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<hr />
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</body>
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</html>
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