[postgis-commits] svn - r2870 - trunk/doc

[postgis-commits at postgis.refractions.net]

Author: robe
Date: 2008-07-21 04:38:00 -0700 (Mon, 21 Jul 2008)
New Revision: 2870

Modified:
   trunk/doc/reference.xml
   trunk/doc/reference_new.xml
Log:
delete reference to ST_Equals in reference.xml - alread in new version, include an ST_DWithin non-join join example.

Modified: trunk/doc/reference.xml
===================================================================
--- trunk/doc/reference.xml	2008-07-18 12:23:07 UTC (rev 2869)
+++ trunk/doc/reference.xml	2008-07-21 11:38:00 UTC (rev 2870)
@@ -24,23 +24,6 @@
 
       <variablelist>
         <varlistentry>
-          <term>ST_Equals(geometry, geometry)</term>
-
-          <listitem>
-            <para>Returns TRUE if the given Geometries are "spatially
-            equal". Use this for a 'better' answer than '='.
-            equals('LINESTRING(0 0, 10 10)','LINESTRING(0 0, 5 5, 10 10)') is
-            true.  Note by spatially equal we also mean ordering of points can be different but
-			represent the same geometry structure.  To verify the order of points is consistent, use 
-			ST_OrderingEquals.</para>
-
-            <para>Performed by the GEOS module</para>
-
-            <para>OGC SPEC s2.1.1.2</para>
-          </listitem>
-        </varlistentry>
-
-        <varlistentry>
           <term>ST_Touches(A geometry, B geometry)</term>
 
           <listitem>
@@ -2653,17 +2636,6 @@
       </varlistentry>
 
       <varlistentry>
-        <term>ST_Equals</term>
-
-        <listitem>
-          <para>Test if an ST_Geometry value as spatially equal to another
-          ST_Geometry value.</para>
-
-          <para>SQL-MM 3: 5.1.24</para>
-        </listitem>
-      </varlistentry>
-
-      <varlistentry>
         <term>ST_ExteriorRing</term>
 
         <listitem>

Modified: trunk/doc/reference_new.xml
===================================================================
--- trunk/doc/reference_new.xml	2008-07-18 12:23:07 UTC (rev 2869)
+++ trunk/doc/reference_new.xml	2008-07-21 11:38:00 UTC (rev 2870)
@@ -1332,6 +1332,14 @@
 	FROM schools s 
 		LEFT JOIN hospitals h ON ST_DWithin(s.the_geom, h.the_geom, 3000)
 	ORDER BY s.gid, ST_Distance(s.the_geom, h.the_geom);
+	
+--The schools with no close hospitals
+--Find all schools with no hospital within 3000 units
+--away from the school.  Units is in units of spatial ref (e.g. meters, feet, degrees)
+SELECT s.gid, s.school_name
+	FROM schools s 
+		LEFT JOIN hospitals h ON ST_DWithin(s.the_geom, h.the_geom, 3000)
+	WHERE h.gid IS NULL;
 			  </programlisting>
       </refsection>
       
@@ -1377,6 +1385,14 @@
 		  <ulink url="http://www.opengeospatial.org/standards/sfs">OpenGIS Simple
 		  Features Implementation Specification for SQL OGC SPEC s2.1.1.2</ulink>
 		</para>
+		
+		<para><inlinemediaobject>
+        <imageobject>
+          <imagedata fileref="images/check.png" />
+        </imageobject>
+      </inlinemediaobject> This method implements the SQL/MM specification:
+	  			SQL-MM 3: 5.1.24
+		</para>
 	
 	  </refsection>