diff --git a/doc/html/index.html b/doc/html/index.html
index 5a7a6ed41..12b4039ff 100644
--- a/doc/html/index.html
+++ b/doc/html/index.html
@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <title>Chapter 1. Geometry</title>
 <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
+<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
 <link rel="home" href="index.html" title="Chapter 1. Geometry">
 <link rel="next" href="geometry/introduction.html" title="Introduction">
 </head>
@@ -150,7 +150,7 @@
 </ul></div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: July 28, 2022 at 11:11:09 GMT</small></p></td>
+<td align="left"><p><small>Last revised: November 21, 2022 at 15:41:14 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>
diff --git a/doc/reference/algorithms/azimuth.qbk b/doc/reference/algorithms/azimuth.qbk
index 5b2606661..d1b985d90 100644
--- a/doc/reference/algorithms/azimuth.qbk
+++ b/doc/reference/algorithms/azimuth.qbk
@@ -12,11 +12,12 @@
 [def __this_function__ azimuth]
 
 [heading_conformance_no_ogc __this_function__]
-[note PostGIS contains an algorithm ST_Azimuth with the same functionality.
-  See the [@https://postgis.net/docs/ST_Azimuth.html PostGIS documentation]. 
+[note PostGIS contains an algorithm ST_Azimuth with the same functionality but could return different
+results e.g. result normalized to range 0 to pi instead of range -pi to pi.
+  See the [@https://postgis.net/docs/ST_Azimuth.html PostGIS documentation].
 ]
 
 [heading Behavior]
 The algorithm calculates the azimuth of a segment defined by a pair of points.
 
-[note The result is in radians.]
+[note The result is in the range -pi to pi radians.]