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Add examples for ST_MakePolygon, correct non-st to ST references in ST_MakePolygon section
git-svn-id: http://svn.osgeo.org/postgis/trunk@2828 b70326c6-7e19-0410-871a-916f4a2858ee
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@ -4579,15 +4579,42 @@ SELECT ST_AsText(ST_MakeLine(ST_MakePoint(1,2), ST_MakePoint(3,4)))
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>ST_MakePolygon(linestring, [linestring[]])</term>
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<varlistentry>
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<term>ST_MakePolygon(linestring geometry)</term>
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<listitem>
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<para>Creates a Polygon formed by the given shell. Input geometries must be closed
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LINESTRINGS (see <link linkend="IsClosed">ST_IsClosed</link> and
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<link linkend="GeometryType">ST_GeometryType</link>). This function will not accept a MULTILINESTRING.</para>
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<programlisting>
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SELECT ST_MakePolygon(ST_GeomFromText('LINESTRING(75.15 29.53,77 29,77.6 29.5, 75.15 29.53)'));
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--If linestring is not closed
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--you can add the start point to close it
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SELECT ST_MakePolygon(ST_AddPoint(foo.open_line, ST_StartPoint(foo.open_line)))
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FROM (
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SELECT ST_GeomFromText('LINESTRING(75.15 29.53,77 29,77.6 29.5)') As open_line) As foo
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</programlisting>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>ST_MakePolygon(linestring geometry, linestrings geometry[])</term>
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<listitem>
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<para>Creates a Polygon formed by the given shell and array of
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holes. You can construct a geometry array using <link
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linkend="Accum">Accum</link>. Input geometries must be closed
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LINESTRINGS (see <link linkend="IsClosed">IsClosed</link> and
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<link linkend="GeometryType">GeometryType</link>).</para>
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linkend="Accum">ST_Accum</link> or the PostgreSQL ARRAY[] and ARRAY() constructs. Input geometries must be closed
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LINESTRINGS (see <link linkend="IsClosed">ST_IsClosed</link> and
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<link linkend="GeometryType">ST_GeometryType</link>).</para>
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<programlisting>
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--Build a donut with an ant hole
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SELECT ST_MakePolygon(
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ST_ExteriorRing(ST_Buffer(foo.line,10)),
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ARRAY[ST_Translate(foo.line,1,1),ST_ExteriorRing(ST_Buffer(ST_MakePoint(20,20),1)) ]
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)
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FROM
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(SELECT ST_ExteriorRing(ST_Buffer(ST_MakePoint(10,10),10,10))
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As line )
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As foo
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</programlisting>
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</listitem>
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</varlistentry>
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