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conver to 1 column 2 row table
git-svn-id: http://svn.osgeo.org/postgis/trunk@5510 b70326c6-7e19-0410-871a-916f4a2858ee
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@ -988,10 +988,10 @@ FROM dummy_rast WHERE rid=1;
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<para>Refer to <ulink url="http://trac.osgeo.org/postgis/wiki/WKTRaster/SpecificationWorking01">WKT Raster Specification</ulink>
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for a diagram of this.</para>
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<informaltable>
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<tgroup cols="2">
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<tgroup cols="1">
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<tbody>
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<row>
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<entry>
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<row>
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<entry>
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<para> <!-- TODO: Put in pictures -->
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<programlisting>-- Note envelope and convexhull are more or less the same
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SELECT ST_AsText(ST_ConvexHull(rast)) As convhull,
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@ -1005,7 +1005,8 @@ FROM dummy_rast WHERE rid=1;
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</programlisting>
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</para>
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</entry>
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</row>
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<row>
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<entry>
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<para> <!-- TODO: Put in pictures -->
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<programlisting>
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