diff --git a/handbook/survey/coord2.html b/handbook/survey/coord2.html
index 0a5086d43..9dcc52cbc 100644
--- a/handbook/survey/coord2.html
+++ b/handbook/survey/coord2.html
@@ -14,6 +14,7 @@
 <a href="coord.htm">Basic Coordinate Systems</a>.<br>
 
 <a href="lasers.htm">Geographical fixed points on Loser</a><br>
+  <a href="/katast.htm">The Austrian Kataster areas</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>.
   
 <h3 id="summary">Summary - for 2023</h3>