missed a spot about occasions where point distance is not same as <->

git-svn-id: http://svn.osgeo.org/postgis/trunk@8289 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/reference_operator.xml b/doc/reference_operator.xml
index 7dcd5c230c57cc193660f742b8d31f3b16dd4d06..75b31dc1042b9a10e1eb186ac5677fbdaf0d59d6 100644 (file)
--- a/doc/reference_operator.xml
+++ b/doc/reference_operator.xml
@@ -1068,8 +1068,8 @@ select 'LINESTRING(0 0, 1 1)'::geometry ~= 'LINESTRING(0 1, 1 0)'::geometry as e
                  <refnamediv>
                        <refname>&lt;-&gt;</refname>
 
-                       <refpurpose>Returns the distance between two points.  For point / point checks it's exact.  For other geometry types
-                       the distance between the bounding box centroids is returned.  Useful for doing distance ordering and nearest neighbor limits
+                       <refpurpose>Returns the distance between two points.  For point / point checks it uses floating point accuracy (as opposed to the double precision accuracy of the underlying point geometry).  For other geometry types
+                       the distance between the floating point bounding box centroids is returned.  Useful for doing distance ordering and nearest neighbor limits
                        using KNN gist functionality.</refpurpose>
                  </refnamediv>