<imagedata fileref="images/check.png" />
</imageobject>
</inlinemediaobject>This function supports 3d and will not drop the z-index.</para>
+
+ <!-- Optionally mention Circular String Support -->
+ <para><inlinemediaobject>
+ <imageobject>
+ <imagedata fileref="images/check.png" />
+ </imageobject>
+ </inlinemediaobject> This method supports Circular Strings and Curves </para>
</refsection>
<function>ST_IsClosed(<varname>NULL</varname>)</function> to be 0, while
PostGIS returns <varname>NULL</varname>.</para>
</note>
+
+ <!-- Optionally mention 3d support -->
+ <para><inlinemediaobject>
+ <imageobject>
+ <imagedata fileref="images/check.png" />
+ </imageobject>
+ </inlinemediaobject> This function supports 3d and will not drop the z-index.</para>
+
+ <!-- Optionally mention Circular String Support -->
+ <para><inlinemediaobject>
+ <imageobject>
+ <imagedata fileref="images/check.png" />
+ </imageobject>
+ </inlinemediaobject> This method supports Circular Strings and Curves </para>
</refsection>
<refsection>
</inlinemediaobject> This method implements the SQL/MM specification:
SQL-MM 3: 5.1.7</para>
+ <!-- Optionally mention Circular String Support -->
+ <para><inlinemediaobject>
+ <imageobject>
+ <imagedata fileref="images/check.png" />
+ </imageobject>
+ </inlinemediaobject> This method supports Circular Strings and Curves </para>
+
</refsection>
t
(1 row)
+ SELECT ST_IsEmpty(ST_GeomFromText('CIRCULARSTRING EMPTY'));
+ st_isempty
+------------
+ t
+(1 row)
+
+
</programlisting>
</refsection>
<title>Examples</title>
<para>Change Mass state plane US feet geometry to WGS 84 long lat</para>
<programlisting>
- SELECT ST_AsText(ST_Transform(ST_GeomFromText('POLYGON((743238 2967416,743238 2967450,
+SELECT ST_AsText(ST_Transform(ST_GeomFromText('POLYGON((743238 2967416,743238 2967450,
743265 2967450,743265.625 2967416,743238 2967416))',2249),4326)) As wgs_geom;
wgs_geom