cross-link pages on kataser areas

guidebook/areas.htm

@@ -18,6 +18,10 @@ Schönberg and Neid Augst-Eck, not far beyond Tunnockschacht, then
 down to the Wildenseehütte. To the west and north of this line is
 area 1626.</p>
 
+<ul>
+        <li>See <a href="/katast.htm">The Austrian Kataster areas</a> full description</li>
+
+</ul>
 <div class="centre">
 <a href="remote.html">
 <img src="../tinypix/wildkg.jpg"

handbook/survey/coord.htm

@@ -16,7 +16,9 @@ If you are not interested in the theoretical background, just jump down to the
 <p>See also:<br>
 <a href="/eastings">Troggle UTM data report</a><br>
 <a href="lasers.htm">Geographical fixed points on Loser</a><br>
-<a href="coord2.html">GPS and coordinate systems</a>.
+<a href="coord2.html">GPS and coordinate systems</a><br>
+<a href="/katast.htm">The Austrian Kataster areas</a>.
+
 
 <p>
 When dealing with geographical data like cave locations, you will

handbook/survey/index.htm

@@ -42,6 +42,7 @@ detailed topics.</p>
 	<ul>
         <li><a href="../logbooks.html">Expo logbooks</a> - how and why 
 		<li><a href="newcave.html">The complete process for recording cave data</a></li>
+        <li><a href="/katast.htm">The Austrian Kataster area</a></li>
 		<li>Current Expo survey <a href="/expofiles/surveyscans/2019/walletindex.html">wallet status</a>.</li>
 		<li>Current Expo survey data <a href="../computing/todo-data.html">TO-DO list</a>.</li>
 	</ul>

katast.htm

@@ -14,6 +14,9 @@ in Austria. Within it, each known cave has a unique number. This number
 comprises two parts - the first part identifies the area in which the
 cave lies, and the second part is a number allocated to the particular
 cave, roughly in the order of discovery.</p>
+<ul>
+<li>See also <a href="/guidebook/areas.htm">CUCC Expo 'Guidebook' Areas</a>
+</ul>
 
 <p>The area numbers divide the country hierarchically, the four digits
 representing successively smaller areas delineated mainly by natural