<para><xref linkend="ST_Simplify" /></para>
</refsection>
</refentry>
-
- <varlistentry>
- <term>ST_SymDifference(geometry A, geometry B)</term>
-
- <listitem>
- <para>Returns a geometry that represents the portions of A and B
- that do not intersect. It is called a symmetric difference because
- ST_SymDifference(A,B) = ST_SymDifference(B,A).</para>
-
- <para>Performed by the GEOS module</para>
-
- <para>Do not call with a GeometryCollection as an argument</para>
-
- <para>OGC SPEC s2.1.1.3</para>
- </listitem>
- </varlistentry>
<refentry id="ST_SymDifference">
<refnamediv>