<para>If you have the extensions available, you can install postgis extension in your database of choice by either using pgAdmin extension interface or running these sql commands:</para>
<programlisting>CREATE EXTENSION postgis;
-CREATE EXTENSION postgis_topology;</programlisting>
+CREATE EXTENSION postgis_topology;
+CREATE EXTENSION postgis_tiger_geocoder;</programlisting>
+
+<para>In psql you can use to see what versions you have installed and also what schema they are installed. </para>
+<programlisting>\connect mygisdb
+\x
+\dx postgis*</programlisting>
+
+<screen>List of installed extensions
+-[ RECORD 1 ]-------------------------------------------------
+-
+Name | postgis
+Version | &last_release_version;
+Schema | public
+Description | PostGIS geometry, geography, and raster spat..
+-[ RECORD 2 ]-------------------------------------------------
+-
+Name | postgis_tiger_geocoder
+Version | &last_release_version;
+Schema | tiger
+Description | PostGIS tiger geocoder and reverse geocoder
+-[ RECORD 3 ]-------------------------------------------------
+-
+Name | postgis_topology
+Version | &last_release_version;
+Schema | topology
+Description | PostGIS topology spatial types and functions</screen>
<warning><para>Extension tables <varname>spatial_ref_sys</varname>, <varname>layer</varname>, <varname>topology</varname> can not be explicitly backed up. They can only
be backed up when the respective <varname>postgis</varname> or <varname>postgis_topology</varname> extension is backed up, which only seems to happen when you backup the whole database.
<para>If you installed postgis without raster support, you'll need to install raster support first (using the full <filename>rtpostgis.sql</filename></para>
<para>Then you can run the below commands to package the functions in their respective extension.</para>
<programlisting>CREATE EXTENSION postgis FROM unpackaged;
-CREATE EXTENSION postgis_topology FROM unpackaged;</programlisting>
+CREATE EXTENSION postgis_topology FROM unpackaged;
+CREATE EXTENSION postgis_tiger_geocoder FROM unpackaged;</programlisting>
</sect2>