</variablelist>
</sect2>
- <sect2>
- <title>Geometry Outputs</title>
-
- <variablelist>
- <varlistentry>
- <term>ST_AsHEXEWKB(geometry, {'NDR'|'XDR'})</term>
-
- <listitem>
- <para>Returns a Geometry in HEXEWKB format (as text) using either
- little-endian (NDR) or big-endian (XDR) encoding.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>ST_AsSVG(geometry, [rel], [precision])</term>
-
- <listitem>
- <para>Return the geometry as SVG path data. Use 1 as second
- argument to have the path data implemented in terms of relative
- moves, the default (or 0) uses absolute moves. Third argument may
- be used to reduce the maximum number of decimal digits used in
- output (defaults to 15). Point geometries will be rendered as
- cx/cy when 'rel' arg is 0, x/y when 'rel' is 1. Multipoint
- geometries are delimited by commas (","), GeometryCollection
- geometries are delimited by semicolons (";").</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>ST_AsGML([version], geometry, [precision])</term>
-
- <listitem>
- <para>Return the geometry as a GML element. The version parameter,
- if specified, may be either 2 or 3. If no version parameter is
- specified then the default is assumed to be 2. The third argument
- may be used to reduce the maximum number of significant digits
- used in output (defaults to 15).</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>ST_AsKML(geometry, [precision])</term>
-
- <listitem>
- <para>Return the geometry as a KML element. Second argument may be
- used to reduce the maximum number of significant digits used in
- output (defaults to 15).</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>ST_AsGeoJson([version], geometry, [precision],
- [options])</term>
-
- <listitem>
- <para>Return the geometry as a GeoJson element. (Cf <ulink
- url="http://geojson.org/geojson-spec.html">GeoJson
- specifications 1.0</ulink>). 2D and 3D Geometries are both
- supported. GeoJson only support SFS 1.1 geometry type (no curve
- support for example).</para>
-
- <para>The version parameter, if specified, must be 1.</para>
-
- <para>The third argument may be used to reduce the maximum number
- of significant digits used in output (defaults to 15).</para>
-
- <para>The last 'options' argument could be used to add Bbox or Crs
- in GeoJSON output:
- <itemizedlist>
- <listitem>
- <para>0: means no option (default value)</para>
- </listitem>
-
- <listitem>
- <para>1: GeoJson CRS</para>
- </listitem>
-
- <listitem>
- <para>2: GeoJson Bbox</para>
- </listitem>
-
- <listitem>
- <para>3: Both GeoJson Bbox and CRS</para>
- </listitem>
- </itemizedlist>
- GeoJson CRS pattern is: <literal>auth_name:auth_srid</literal>
- from spatial_ref_sys table (EPSG:4326 for instance).
- </para>
- <para>Availability: 1.3.4</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </sect2>
-
<sect2>
<title>Geometry Constructors</title>
<para><xref linkend="ST_AsEWKB" />, <xref linkend="ST_AsEWKT" />, <xref linkend="ST_AsText" />, <xref linkend="ST_GeomFromEWKB" /></para>
</refsection>
</refentry>
- <refentry id="ST_AsEWKB">
+ <refentry id="ST_AsEWKB">
<refnamediv>
<refname>ST_AsEWKB</refname>
<refpurpose>Return the Well-Known Binary (WKB) representation of the geometry with SRID meta data.</refpurpose>
<title>See Also</title>
<para><xref linkend="ST_AsBinary" /><xref linkend="ST_AsEWKB" /><xref linkend="ST_AsText" />, <xref linkend="ST_GeomFromEWKT" /></para>
</refsection>
+ </refentry>
+ <refentry id="ST_AsGeoJson">
+ <refnamediv>
+ <refname>ST_AsGeoJson</refname>
+
+ <refpurpose>Return the geometry as a GeoJson element.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_decimal_digits</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_decimal_digits</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>options</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>integer </type> <parameter>version</parameter></paramdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>integer </type> <parameter>version</parameter></paramdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_decimal_digits</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGeoJSON</function></funcdef>
+ <paramdef><type>integer </type> <parameter>version</parameter></paramdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_decimal_digits</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>options</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>Return the geometry as a GeoJson element. (Cf <ulink
+ url="http://geojson.org/geojson-spec.html">GeoJson
+ specifications 1.0</ulink>). 2D and 3D Geometries are both
+ supported. GeoJson only support SFS 1.1 geometry type (no curve
+ support for example).</para>
+
+ <para>The version parameter, if specified, must be 1.</para>
+
+ <para>The third argument may be used to reduce the maximum number
+ of significant digits used in output (defaults to 15).</para>
+
+ <para>The last 'options' argument could be used to add Bbox or Crs
+ in GeoJSON output:
+ <itemizedlist>
+ <listitem>
+ <para>0: means no option (default value)</para>
+ </listitem>
+
+ <listitem>
+ <para>1: GeoJson CRS</para>
+ </listitem>
+
+ <listitem>
+ <para>2: GeoJson Bbox</para>
+ </listitem>
+
+ <listitem>
+ <para>3: Both GeoJson Bbox and CRS</para>
+ </listitem>
+ </itemizedlist>
+ GeoJson CRS pattern is: <literal>auth_name:auth_srid</literal>
+ from spatial_ref_sys table (EPSG:4326 for instance).
+ </para>
+ <para>Version 1: ST_AsGeoJson(geom) / precision=15 version=1 options=0</para>
+ <para>Version 2: ST_AsGeoJson(geom, precision) / version=1 options=0</para>
+ <para>Version 3: ST_AsGeoJson(geom, precision, options) / version=1</para>
+ <para>Version 4: ST_AsGeoJson(version, geom) / precision=15 options=0</para>
+ <para>Version 5: ST_AsGeoJson(version, geom, precision) /options=0</para>
+ <para>Version 6: ST_AsGeoJson(version, geom, precision,options)</para>
+
+ <note><para>Availability: 1.3.4</para></note>
+ </refsection>
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting><!-- TODO: --></programlisting>
+ </refsection>
+ </refentry>
+ <refentry id="ST_AsGML">
+ <refnamediv>
+ <refname>ST_AsGML</refname>
+ <refpurpose>Return the geometry as a GML version 2 or 3 element.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGML</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGML</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_num_decimal_digits</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsGML</function></funcdef>
+ <paramdef><type>integer </type> <parameter>version</parameter></paramdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_num_decimal_digits</parameter></paramdef>
+ </funcprototype>
+ <!-- TODO: itemize other prototypes - 1 more -->
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>Return the geometry as a Geography Markup Language (GML) element. The version parameter,
+ if specified, may be either 2 or 3. If no version parameter is
+ specified then the default is assumed to be 2. The third argument
+ may be used to reduce the maximum number of significant digits
+ used in output (defaults to 15).</para>
+
+ <!-- TODO: Itemize defaults for each function -->
+
+ <note>
+ <para>Availability: 1.3.2</para>
+ </note>
+ </refsection>
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>SELECT ST_AsGML(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));
+
+ st_asgml
+ --------
+ </programlisting>
+ </refsection>
+ </refentry>
+
+
+ <refentry id="ST_AsHEXEWKB">
+ <refnamediv>
+ <refname>ST_AsHEXEWKB</refname>
+
+ <refpurpose>Returns a Geometry in HEXEWKB format (as text) using either
+ little-endian (NDR) or big-endian (XDR) encoding.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>text <function>ST_AsHEXEWKB</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>text </type> <parameter>NDRorXDR</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>text <function>ST_AsHEXEWKB</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>Returns a Geometry in HEXEWKB format (as text) using either
+ little-endian (NDR) or big-endian (XDR) encoding. If no encoding is specified, then NDR is used.</para>
+
+ <note>
+ <para>Availability: 1.2.2</para>
+ </note>
+ </refsection>
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>SELECT ST_AsHEXEWKB(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));
+ which gives same answer as
+
+ SELECT ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326)::text;
+
+ st_ashexewkb
+ --------
+ 0103000020E6100000010000000500
+ 00000000000000000000000000000000
+ 00000000000000000000000000000000F03F
+ 000000000000F03F000000000000F03F000000000000F03
+ F000000000000000000000000000000000000000000000000</programlisting>
+ </refsection>
+ </refentry>
+
+ <refentry id="ST_AsKML">
+ <refnamediv>
+ <refname>ST_AsKML</refname>
+
+ <refpurpose>Return the geometry as a KML element. Second argument may be
+ used to reduce the maximum number of significant digits used in
+ output (defaults to 15).</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>text <function>ST_AsKML</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsKML</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>max_num_decimal_digits</parameter></paramdef>
+ </funcprototype>
+ <!-- TODO: itemize other prototypes - 3 more -->
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>Return the geometry as a Keyhole Markup Language (KML) element. Second argument may be
+ used to reduce the maximum number of significant digits used in
+ output (defaults to 15).</para>
+
+ <!-- TODO: Itemize defaults for each function -->
+
+ <note>
+ <para>Availability: 1.2.2 - later variants that include version param came in 1.3.2</para>
+ </note>
+ </refsection>
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>SELECT ST_AsKML(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));
+
+ st_askml
+ --------
+ <literal><Polygon>
+ <outerBoundaryIs>
+ <LinearRing><coordinates>0,0 0,1 1,1 1,0 0,0</coordinates></LinearRing>
+ </outerBoundaryIs>
+ </Polygon>
+ </literal>
+ </programlisting>
+ </refsection>
+ </refentry>
+ <refentry id="ST_AsSVG">
+ <refnamediv>
+ <refname>ST_AsSVG</refname>
+
+ <refpurpose>Returns a Geometry in SVG path data.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>text <function>ST_AsSVG</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsSVG</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>rel</parameter></paramdef>
+ </funcprototype>
+ <funcprototype>
+ <funcdef>text <function>ST_AsSVG</function></funcdef>
+ <paramdef><type>geometry </type> <parameter>g1</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>rel</parameter></paramdef>
+ <paramdef><type>integer </type> <parameter>maxdecimaldigits</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>Return the geometry as Scalar Vector Graphics (SVG) path data. Use 1 as second
+ argument to have the path data implemented in terms of relative
+ moves, the default (or 0) uses absolute moves. Third argument may
+ be used to reduce the maximum number of decimal digits used in
+ output (defaults to 15). Point geometries will be rendered as
+ cx/cy when 'rel' arg is 0, x/y when 'rel' is 1. Multipoint
+ geometries are delimited by commas (","), GeometryCollection
+ geometries are delimited by semicolons (";").</para>
+
+ <note>
+ <para>Availability: 1.2.2</para>
+ </note>
+ </refsection>
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>SELECT ST_AsSVG(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));
+
+ st_assvg
+ --------
+ M 0 0 0 -1 1 -1 1 0 Z</programlisting>
+ </refsection>
</refentry>
- <refentry id="ST_AsText">
+ <refentry id="ST_AsText">
<refnamediv>
<refname>ST_AsText</refname>
<refpurpose>Return the Well-Known Text (WKT) representation of the geometry without SRID metadata.</refpurpose>
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