<para>Refer to <ulink url="http://trac.osgeo.org/postgis/wiki/WKTRaster/SpecificationWorking01">WKT Raster Specification</ulink>
for a diagram of this.</para>
<informaltable>
- <tgroup cols="2">
+ <tgroup cols="1">
<tbody>
- <row>
- <entry>
+ <row>
+ <entry>
<para> <!-- TODO: Put in pictures -->
<programlisting>-- Note envelope and convexhull are more or less the same
SELECT ST_AsText(ST_ConvexHull(rast)) As convhull,
</programlisting>
</para>
</entry>
-
+ </row>
+ <row>
<entry>
<para> <!-- TODO: Put in pictures -->
<programlisting>