emphasize approximate in KNN operators to reduce the chance of any misunderstandings

git-svn-id: http://svn.osgeo.org/postgis/trunk@8291 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/reference_operator.xml b/doc/reference_operator.xml
index 75b31dc1042b9a10e1eb186ac5677fbdaf0d59d6..75e14e2d195163f7820c1f41e2bc73a60d4950ac 100644 (file)
--- a/doc/reference_operator.xml
+++ b/doc/reference_operator.xml
@@ -1097,7 +1097,7 @@ select 'LINESTRING(0 0, 1 1)'::geometry ~= 'LINESTRING(0 1, 1 0)'::geometry as e
                        <title>Description</title>
 
                        <para>The <varname>&lt;-&gt;</varname> operator returns distance between two points read from the spatial index for points (float precision).  For
-                       other geometries it returns the distance from centroid of bounding box of geometries.  Useful for doing nearest neighbor approximate distance ordering.</para>
+                       other geometries it returns the distance from centroid of bounding box of geometries.  Useful for doing nearest neighbor <emphasis>approximate</emphasis> distance ordering.</para>
 
                        <note><para>This operand will make use of any indexes that may be available on the
                          geometries.  It is different from other operators that use spatial indexes in that the spatial index is only used when the operator
@@ -1212,7 +1212,7 @@ Finally the hybrid:
                  <refsection>
                        <title>Description</title>
 
-                       <para>The <varname>&lt;#&gt;</varname> KNN GIST operator returns distance between two floating point bounding boxes read from the spatial index if available.   Useful for doing nearest neighbor approximate distance ordering.</para>
+                       <para>The <varname>&lt;#&gt;</varname> KNN GIST operator returns distance between two floating point bounding boxes read from the spatial index if available.   Useful for doing nearest neighbor <emphasis>approximate</emphasis> distance ordering.</para>
 
                        <note><para>This operand will make use of any indexes that may be available on the
                          geometries.  It is different from other operators that use spatial indexes in that the spatial index is only used when the operator