simple instructions for mobile phones added - online edit of handbook/survey/coord2.html

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Philip Sargent 2023-08-02 07:39:05 +01:00
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<link rel="stylesheet" type="text/css" href="../../css/main2.css" /> <link rel="stylesheet" type="text/css" href="../../css/main2.css" />
</head> </head>
<body> <body>
<h2 id="tophead">CUCC Expo Surveying Handbook</h2> <h2 id="tophead">CUCC Expo Surveying Handbook</h2>
<h1>GPS and coordinate systems</h1> <h1>GPS and coordinate systems</h1>
<style>figure {font-weight: bold; font-size: small; font-family: sans-serif;font-variant-caps: small-caps;}</style> <style>figure {font-weight: bold; font-size: small; font-family: sans-serif;font-variant-caps: small-caps;}</style>
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<a href="lasers.htm">Geographical fixed points on Loser</a><br> <a href="lasers.htm">Geographical fixed points on Loser</a><br>
<a href="coord.htm">Basic Coordinate Systems</a>.<br> <a href="coord.htm">Basic Coordinate Systems</a>.<br>
<a href="https://hoehle.org/downloads/SD_10_Handbuch.pdf">SD 10 Handbook: Vergleich der &Ouml;K 50 mit der neuen &Ouml;K 50-UTM</a>. <a href="https://hoehle.org/downloads/SD_10_Handbuch.pdf">SD 10 Handbook: Vergleich der &Ouml;K 50 mit der neuen &Ouml;K 50-UTM</a>.
<h3 id="summary">Summary - for 2023</h3>
<p>Surveying in Austria does <em>not</em> use the latitude and longitude you may be familiar with from Google maps, your phone etc.
<p>All our caves and locations in our survex files use the <a href="https://hoehle.org/downloads/SD_10_Handbuch.pdf">Austrian Caving national grid system</a>, numbers which look like this:
<table class="trad">
<tr><th> Northing</th><th> Easting</th><th> Altitude</th><th>
Description</th></tr>
<tr><td>411563.49 </td><td>5282622.35</td><td> 1867.95m </td><td>
p204a at the Stone Bridge</td></tr>
</table>
<p>These grid references are what we use to locate the entrances and to tie in the survey of a new cave in with the rest of the 180+ km of cave and surface surveys.
<p>Note that there are 6 digits starting 41... and 7 digits starting 52... This is not a mistake.
<p>However, when you prospecting and discover a new cave, you possibly only have the WGS84 latitude and logitude from your phone, e.g. <var>47.690933 N 13.821467 E</var> (degrees and decimals of degrees, set your phone to produce this: none of that degrees/minutes/seconds stuff, but if that's all that you have, we can work with that).
<p>So when you are recording the position of a completely new entrance, before you do any surveying, it will be the WGS84 lat/long that you will be writing down on the survey notes, and which will get scanned into the wallet back at base, and which you will enter into the <a href="/handbook/survey/caveentry.html">New Cave and Entrance forms</a> on troggle (step 6 of the dave data processing guide) in the lat/long. data entry fields.
<h3>Coordinate systems</h3> <h3>Coordinate systems</h3>
<p>[The text from this point onwards is from before we had mobile phones, but it is correct.]
<p>It doesn't especially matter what display options are selected when you <p>It doesn't especially matter what display options are selected when you
are getting the GPS fix, but it is important to use standard ones when writing are getting the GPS fix, but it is important to use standard ones when writing
@ -120,39 +134,5 @@ whether your GPS is set up right by just GPSsing a known point and comparing
the results. However, the main point of having a GPS fix on an entrance is the results. However, the main point of having a GPS fix on an entrance is
so we can find it again and be sure it is the same one!</p> so we can find it again and be sure it is the same one!</p>
<hr /> <hr /></body>
<ul id="links">
<li><b>Expedition Handbook:</b>
<ul>
<li>Expo Handbook <a href="../index.htm">Introduction</a></li>
<li><b>Surveying:</b>
<ul>
<li>Surveying <a href="index.htm">Overview</a> and index of
topics</li>
<li><a href="what.htm">What is a cave survey?</a></li>
<li><a href="why.htm">Why am I doing this?</a></li>
<li>Methods: <a href="how.htm">underground</a></li>
<li>Pitfalls to avoid, <a href="hints.htm">hints'n'tips</a> to
make life easier</li>
<li>Methods: <a href="ontop.htm">surface</a></li>
<li>Base Camp: <a href="getin.htm">getting it in</a> to the
computer</li>
<li>Base Camp: <a href="drawup.htm">drawing it up</a>, writing
the description</li>
</ul></li>
<li><a href="../look4.htm">Prospecting guide</a></li>
<li><a href="../rescue.htm">Rescue guide</a></li>
<li><a href="../rig/rigit.html">Rigging guide</a></li>
<li><a href="../photo.htm">Photography guide</a></li>
</ul></li>
<li><a href="../../infodx.htm">Index to info/topics pages</a></li>
<li><a href="../../indxal.htm">Full Index to area 1623</a>
<ul>
<li><a href="../../areas.htm">Area/subarea descriptions</a></li>
</ul></li>
<li><a href="../../index.htm">Back to Expedition Intro page</a></li>
<li><a href="../../../index.htm">Back to CUCC Home page</a></li>
</ul>
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