Related to #2321. SFCGAL doc entry in installation.xml.

git-svn-id: http://svn.osgeo.org/postgis/trunk@11419 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/installation.xml b/doc/installation.xml
index 5cea12412556c325d458ec5c8c50c3e5dc36c416..bfeb9e8abd3fa96fba5adf7bde5a494d15608f8f 100644 (file)
--- a/doc/installation.xml
+++ b/doc/installation.xml
@@ -156,6 +156,14 @@ psql -d yourdatabase -f doc/topology_comments.sql</programlisting>
                </para>
          </listitem>
          
+         <listitem>
+               <para>
+                  SFCGAL, version 0.2 (or higher) could be used to provide additional 2D and 3D advanced analysis functions to PostGIS cf <xref linkend="reference_sfcgal" />. And also allow to use SFCGAL rather than GEOS for some 2D functions provided by both backends (like ST_Intersection or ST_Area, for instance). A PostgreSQL configuration variable <code>postgis.backend</code> allow end user to control which backend he want to use if SFCGAL is installed (GEOS by default). Nota: SFCGAL 0.2 require at least CGAL 4.1.
+
+                 <ulink url="https://github.com/Oslandia/SFCGAL">https://github.com/Oslandia/SFCGAL</ulink>.
+               </para>
+         </listitem>
+
          <listitem>
                <para>
                 CUnit (<filename>CUnit</filename>). This is needed for regression testing. <ulink url="http://cunit.sourceforge.net/">http://cunit.sourceforge.net/</ulink>