updated text - online edit of handbook/survey/numbering.html

handbook/survey/numbering.html

@@ -26,9 +26,8 @@ Austrians have been marking caves with a numbered alloy
 tag bolted to the cave entrance. This also has the advantage of a definite
 fixed point to take the survey to.</p>
 <p>We still (2023) use numbered alloy tags, but there is a move to replace this
-with a properly-managed and accessible GPS system. However the accuracy and
-difficulty of accessing the entrance locations online, on the plateau, mean that we are still
-using tags.
+with a properly-managed and accessible GPS system. However the ~5m practical accuracy of the GPS, the multitude of holes within 5m and
+  difficulty of accessing the entrance locations online on the plateau, mean that tags are still very useful; but we need photos of the tags showing exactly where they are around the pit.
 
 <h3>Austrian Kataster Requirments</h3>
 <p>From 1996, we have had to abandon the system (which we believed
@@ -60,8 +59,7 @@ record of the surface location is also pretty essential.
 
 <p>There are also a 
 number of caves tagged with numbers of the form "year-xx-nn" where xx are the 
-initials of the discoverer (eg 2002-AD-01). Although this discoverer naming 
-system has been vaguely deprecated, it does at least mean that there is no 
+initials of the discoverer (eg 2002-AD-01). This means that there is no 
 duplication during an expo with many people prospecting at the same time.</p>
 
 <h3>Recording Cave Entrances</h3>
@@ -75,11 +73,12 @@ duplication during an expo with many people prospecting at the same time.</p>
 </figure>
 </div>
 <p>Anything longer than 10m needs a number, a survey of appropriate
-accuracy, and location information (<a href="../findit.htm">bearings from
+accuracy,  location information (GPS or <a href="../findit.htm">bearings from
 entrance to known points</a>, entrance photos and description of route to entrance as a
 minimum - <a href="ontop.htm">surface surveys</a> are really required
 for caves within a reasonable distance of existing known points, a <a
 href="gps.htm">GPS fix</a> is essential but insufficient on its own. 
+  <p>In an area with many pits, a <em>sketch</em> is better than a photograph to distinguish the entrance from all the other holes.
 <p>
 If a cave is not readily apparent from the immediate area, bearings or a GPS 
 fix will be inadequate to refind it, and a good sketch or photographs of the 
@@ -139,6 +138,7 @@ together with any other caves which we have information on, which we are
 permitted to publish. 
 
 <h4>Restricted cave data publication</h4>
+
 <p>We are always very pleased to receive any information on
 other caves in the area, to make the database more complete. It is in no-one's
 interest to reexplore known cave, or to intrude on someone else's ongoing
@@ -146,14 +146,13 @@ project ! There is a limited amount of information in the database on caves
 not explored by CUCC, for which we are not permitted to make the data
 publicly available - none of this information has been checked in the field
 and is likely to be out of date, if not just plain wrong. The data are
-included for completeness and should help CUCC during expeditions. We may be
-able to make the data available (through password-protected access to those
+included for completeness and should help CUCC during expeditions. We can make the data available (through password-protected access to those
 net pages) to other groups with a bona fide need.
 <p>The non-public data is available to logged-in users, using the 'Log in' menu item at the top-right of all the handbook pages and using our usual 'cavey:beery' password.
 </p>
 
 <hr />
-[This page originally written by AERW in 1996]
+[This page originally written by AERW in 1996 and updated substantially]
 <!--
 <h3>Revision history</h3>
 <p>(but only revisions to content, not typos and link bugs...)</p>