feet based ones or ESRI created ones you will need to pull from <ulink url="http://spatialreference.org">spatialreference.org</ulink>.
</para>
<para>
- For details on determining which UTM zone to use for your area of interest, check out the <ulink url="/support/wiki/index.php?plpgsqlfunctions">utmzone PostGIS plpgsql helper function</ulink>.
+ For details on determining which UTM zone to use for your area of interest, check out the <ulink url="http://trac.osgeo.org/postgis/wiki/UsersWikiplpgsqlfunctionsDistance">utmzone PostGIS plpgsql helper function</ulink>.
</para>
<para>The <varname>SPATIAL_REF_SYS</varname> table definition is as