[postgis-tickets] r15611 - Note that ST_Intersection drops M

[Regina Obe]

Author: robe
Date: 2017-09-01 06:58:46 -0700 (Fri, 01 Sep 2017)
New Revision: 15611

Modified:
   trunk/doc/reference_processing.xml
Log:
Note that ST_Intersection drops M
References #3826 for PostGIS 2.4.0

Modified: trunk/doc/reference_processing.xml
===================================================================
--- trunk/doc/reference_processing.xml	2017-09-01 05:43:19 UTC (rev 15610)
+++ trunk/doc/reference_processing.xml	2017-09-01 13:58:46 UTC (rev 15611)
@@ -1810,6 +1810,8 @@
 			<para>Do not call with a <varname>GEOMETRYCOLLECTION</varname> as an argument</para>
 		  </important>
 
+	  	<warning><para>This function will drop the M coorindate values if present.</para></warning>
+
 		  <warning><para>If working with 3D geometries, you may want to use SFGCAL based <xref linkend="ST_3DIntersection" /> which does a proper 3D intersection for 3D geometries.  Although this function works with Z-coordinate, it does an averaging of Z-Coordinate values when <code>postgis.backend=geos</code>. <code>postgis.backend=sfcgal</code>, it will return a 2D geometry regardless ignoring the Z-Coordinate. Refer to <xref linkend="postgis_backend" /> for details.</para></warning>
 
 		  <para>Performed by the GEOS module</para>