[postgis-tickets] r15612 - Note that ST_Intersection drops M

[Regina Obe]

Author: robe
Date: 2017-09-01 07:00:22 -0700 (Fri, 01 Sep 2017)
New Revision: 15612

Modified:
   branches/2.3/doc/reference_processing.xml
Log:
Note that ST_Intersection drops M
Closes #3826 for PostGIS 2.3.4

Modified: branches/2.3/doc/reference_processing.xml
===================================================================
--- branches/2.3/doc/reference_processing.xml	2017-09-01 13:58:46 UTC (rev 15611)
+++ branches/2.3/doc/reference_processing.xml	2017-09-01 14:00:22 UTC (rev 15612)
@@ -1760,6 +1760,9 @@
 			<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>