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    <title>Survex 1.4.17 Manual &#8212; Survex 1.4.17 documentation</title>
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  <section id="survex-release-manual">
<h1>Survex 1.4.17 Manual<a class="headerlink" href="#survex-release-manual" title="Link to this heading">¶</a></h1>
<p>This is the manual for Survex - a Free and Open-Source Software package for
cave surveyors.</p>
<ul class="simple">
<li><p>Copyright © 1998-2025 Olly Betts</p></li>
<li><p>Copyright © 2001 Mark Shinwell</p></li>
<li><p>Copyright © 2020 Wookey</p></li>
<li><p>Copyright © 2020,2022 Eric C. Landgraf</p></li>
</ul>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="intro.htm">Introduction</a><ul>
<li class="toctree-l2"><a class="reference internal" href="intro.htm#about-survex">About Survex</a></li>
<li class="toctree-l2"><a class="reference internal" href="intro.htm#about-this-manual">About this Manual</a><ul>
<li class="toctree-l3"><a class="reference internal" href="intro.htm#terminology">Terminology</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="getstart.htm">Getting Started</a><ul>
<li class="toctree-l2"><a class="reference internal" href="getstart.htm#obtaining-survex">Obtaining Survex</a></li>
<li class="toctree-l2"><a class="reference internal" href="getstart.htm#installing-survex">Installing Survex</a><ul>
<li class="toctree-l3"><a class="reference internal" href="getstart.htm#linux">Linux</a></li>
<li class="toctree-l3"><a class="reference internal" href="getstart.htm#macos">macOS</a></li>
<li class="toctree-l3"><a class="reference internal" href="getstart.htm#other-versions-of-unix">Other versions of UNIX</a></li>
<li class="toctree-l3"><a class="reference internal" href="getstart.htm#microsoft-windows">Microsoft Windows</a></li>
</ul>
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<li class="toctree-l2"><a class="reference internal" href="getstart.htm#configuration">Configuration</a><ul>
<li class="toctree-l3"><a class="reference internal" href="getstart.htm#selecting-your-preferred-language">Selecting Your Preferred Language</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="getstart.htm#using-survex">Using Survex</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="cmdline.htm">Survex Programs</a><ul>
<li class="toctree-l2"><a class="reference internal" href="cmdline.htm#standard-options">Standard Options</a></li>
<li class="toctree-l2"><a class="reference internal" href="cmdline.htm#short-and-long-options">Short and Long Options</a></li>
<li class="toctree-l2"><a class="reference internal" href="cmdline.htm#filenames-on-the-command-line">Filenames on the Command Line</a></li>
<li class="toctree-l2"><a class="reference internal" href="cmdline.htm#command-reference">Command Reference</a><ul>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#aven">aven</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#cavern">cavern</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#diffpos">diffpos</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#dump3d">dump3d</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#extend">extend</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#sorterr">sorterr</a></li>
<li class="toctree-l3"><a class="reference internal" href="cmdline.htm#survexport">survexport</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="datafile.htm">Survex data files</a><ul>
<li class="toctree-l2"><a class="reference internal" href="datafile.htm#readings">Readings</a></li>
<li class="toctree-l2"><a class="reference internal" href="datafile.htm#survey-station-names">Survey Station Names</a><ul>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#anonymous-stations">Anonymous Stations</a></li>
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</li>
<li class="toctree-l2"><a class="reference internal" href="datafile.htm#numeric-fields">Numeric fields</a></li>
<li class="toctree-l2"><a class="reference internal" href="datafile.htm#accuracy">Accuracy</a></li>
<li class="toctree-l2"><a class="reference internal" href="datafile.htm#cavern-commands">Cavern Commands</a><ul>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#alias">ALIAS</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#begin">BEGIN</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#cartesian">CARTESIAN</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#calibrate">CALIBRATE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#case">CASE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#copyright">COPYRIGHT</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#cs">CS</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#data">DATA</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#date">DATE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#declination">DECLINATION</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#default">DEFAULT</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#end">END</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#entrance">ENTRANCE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#equate">EQUATE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#export">EXPORT</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#fix">FIX</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#flags">FLAGS</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#include">INCLUDE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#infer">INFER</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#instrument">INSTRUMENT</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#prefix">PREFIX</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#ref">REF</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#require">REQUIRE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#sd">SD</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#set">SET</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#solve">SOLVE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#team">TEAM</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#title">TITLE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#truncate">TRUNCATE</a></li>
<li class="toctree-l3"><a class="reference internal" href="datafile.htm#units">UNITS</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="svxhowto.htm"><code class="docutils literal notranslate"><span class="pre">.svx</span></code> Cookbook</a><ul>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#join-surveys-together">Join surveys together</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#surface-survey-data">Surface survey data</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#reading-order">Reading order</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#plumbs">Plumbs</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#legs-across-static-water">Legs across static water</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#specify-a-bcra-grade">Specify a BCRA grade</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#override-accuracy-for-a-leg">Override accuracy for a leg</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#repeated-readings">Repeated Readings</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#radiolocation-data">Radiolocation Data</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#diving-data">Diving Data</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#theodolite-data">Theodolite data</a></li>
<li class="toctree-l2"><a class="reference internal" href="svxhowto.htm#change-special-characters">Change special characters</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="genhowto.htm">General: How do I?</a><ul>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#create-a-new-survey">Create a new survey</a></li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#organise-my-surveys">Organise my surveys</a><ul>
<li class="toctree-l3"><a class="reference internal" href="genhowto.htm#fixed-points-control-points">Fixed Points (Control Points)</a></li>
<li class="toctree-l3"><a class="reference internal" href="genhowto.htm#more-than-one-survey-per-trip">More than one survey per trip</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#add-surface-topography">Add surface topography</a></li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#overlay-a-grid">Overlay a grid</a></li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#import-data-from-other-programs">Import data from other programs</a></li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#see-errors-and-warnings-that-have-gone-off-the-screen">See errors and warnings that have gone off the screen</a></li>
<li class="toctree-l2"><a class="reference internal" href="genhowto.htm#create-an-extended-elevation">Create an Extended Elevation</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="compass.htm">Larry Fish’s Compass</a><ul>
<li class="toctree-l2"><a class="reference internal" href="compass.htm#compass-mak-support">Compass .MAK support</a></li>
<li class="toctree-l2"><a class="reference internal" href="compass.htm#compass-dat-support">Compass .DAT support</a></li>
<li class="toctree-l2"><a class="reference internal" href="compass.htm#compass-clp-support">Compass .CLP support</a></li>
<li class="toctree-l2"><a class="reference internal" href="compass.htm#compass-plf-plt-support">Compass .PLF/.PLT support</a><ul>
<li class="toctree-l3"><a class="reference internal" href="compass.htm#reading-compass-plf-plt">Reading Compass .PLF/.PLT</a></li>
<li class="toctree-l3"><a class="reference internal" href="compass.htm#exporting-compass-plt">Exporting Compass .PLT</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="walls.htm">David McKenzie’s Walls</a></li>
<li class="toctree-l1"><a class="reference internal" href="cmap.htm">Bob Thrun’s CMAP</a></li>
<li class="toctree-l1"><a class="reference internal" href="img.htm">Using the img library</a><ul>
<li class="toctree-l2"><a class="reference internal" href="img.htm#using-img-in-your-own-code">Using img in your own code</a></li>
<li class="toctree-l2"><a class="reference internal" href="img.htm#api">API</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="maillist.htm">Mailing List</a></li>
<li class="toctree-l1"><a class="reference internal" href="future.htm">Future Developments</a></li>
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