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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
project.
Copyright (C) 1998-2018 OpenLink Software
This project is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; only version 2 of the License, dated June 1991.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
$
-->
<refentry id="fn_ST_M">
<refmeta>
<refentrytitle>ST_M</refentrytitle>
<refmiscinfo>geo</refmiscinfo>
</refmeta>
<refnamediv>
<refname>ST_M</refname>
<refpurpose>returns the M coordinate.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_ST_M">
<funcprototype id="fproto_ST_M">
<funcdef><function>ST_M</function></funcdef>
<paramdef>in <parameter>g</parameter> any</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_ST_M">
<title>Description</title>
<para>returns the M coordinate. M is for mileage or the like. M equal to 245.3 could be 245.3 km of road or 0.3 distance from
buoy 245 to buoy 246 or similar.</para>
</refsect1>
<refsect1 id="params_ST_M">
<title>Parameters</title>
<refsect2><title>g</title>
<para>Geometry point</para>
</refsect2>
</refsect1>
<refsect1 id="ret_ST_M"><title>Return Types</title>
<para>Returns double precision.</para>
</refsect1>
<refsect1 id="examples_ST_M">
<title>Examples</title>
<example id="ex_ST_M"><title>Simple Use</title>
<screen><![CDATA[
SELECT st_m( st_point (10, 20, 30, 40));
unnamed
DOUBLE PRECISION
40
]]>
</screen>
</example>
</refsect1>
<refsect1 id="seealso_ST_M">
<title>See Also</title>
<para><link linkend="fn_st_x"><function>ST_X()</function></link></para>
<para><link linkend="fn_st_y"><function>ST_Y()</function></link></para>
<para><link linkend="fn_ST_Z"><function>ST_Z()</function></link></para>
<para><link linkend="fn_ST_XMin"><function>ST_XMin()</function></link></para>
<para><link linkend="fn_ST_XMax"><function>ST_XMax()</function></link></para>
<para><link linkend="fn_ST_YMin"><function>ST_YMin()</function></link></para>
<para><link linkend="fn_ST_YMax"><function>ST_YMax()</function></link></para>
<para><link linkend="fn_ST_ZMin"><function>ST_ZMin()</function></link></para>
<para><link linkend="fn_ST_ZMax"><function>ST_ZMax()</function></link></para>
<para><link linkend="fn_ST_MMin"><function>ST_MMin()</function></link></para>
<para><link linkend="fn_ST_MMax"><function>ST_MMax()</function></link></para>
</refsect1>
</refentry>
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