From 7822734e6d19cee8af1bf3dd7c7801c01f836af5 Mon Sep 17 00:00:00 2001 From: Regina Obe Date: Sun, 11 Dec 2011 19:29:58 +0000 Subject: [PATCH] preliminary documentation for raster version of ST_Union aggregate function git-svn-id: http://svn.osgeo.org/postgis/trunk@8352 b70326c6-7e19-0410-871a-916f4a2858ee --- doc/reference_raster.xml | 59 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/doc/reference_raster.xml b/doc/reference_raster.xml index 884b41d22..b03d79f25 100644 --- a/doc/reference_raster.xml +++ b/doc/reference_raster.xml @@ -6545,6 +6545,65 @@ UPDATE wind ,, ,, , + + + + ST_Union + Returns the union of a set of raster tiles into a single raster composed of 1 band. If no band is specified for unioning, band num 1 is assumed. The resulting raster's extent is the extent of the whole set. In the case of intersection, the resulting value is defined by p_expression which is one of the following: LAST - the default when none is specified, MEAN, SUM, FIRST + + + + + + raster ST_Union + setof raster rast + + + + + geometry ST_Union + raster set rast + integer band_num + + + + + geometry ST_Union + raster set rast + text p_expression + + + + + geometry ST_Union + raster set rast + text p_expression + integer band_num + + + + + + Description + + Returns the union of a set of raster tiles into a single raster composed of 1 band. If no band is specified for unioning, band num 1 is assumed. The resulting raster's extent is the extent of the whole set. In the case of intersection, the resulting value is defined by p_expression which is one of the following: LAST - the default when none is specified, MEAN, SUM, FIRST + + There are several other variants of this function not installed by default in PostGIS 2.0.0 -- these can be found in the raster/scripts/plpgsql/st_union.sql file of postgis source code. + + Availability: 2.0.0 + + + + Examples + + + + + + See Also + , + + -- 2.40.0