diff --git a/gpdb-doc/dita/ref_guide/extensions/postGIS.xml b/gpdb-doc/dita/ref_guide/extensions/postGIS.xml
index 2fc098eec1a8b0c4d14da76121f28d6d093a8044..1d24cb7b84b338c232842897bb6f5402a8c12117 100644
--- a/gpdb-doc/dita/ref_guide/extensions/postGIS.xml
+++ b/gpdb-doc/dita/ref_guide/extensions/postGIS.xml
@@ -15,12 +15,7 @@
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-
-
-
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@@ -36,44 +31,52 @@
Information Systems) objects to be stored in the database. The Greenplum Database PostGIS
extension includes support for GiST-based R-Tree spatial indexes and functions for analysis
and processing of GIS objects.
- Go to
- http://postgis.refractions.net/ for more information about PostGIS.
+ The Greenplum Database PostGIS extension supports the optional PostGIS
+ raster data type and most PostGIS Raster functions. With the PostGIS
+ Raster objects, PostGIS geometry data type offers a single set of overlay
+ SQL functions (such as ST_Intersects) operating seamlessly on vector and
+ raster geospatial data. PostGIS Raster uses the GDAL (Geospatial Data Abstraction Library)
+ translator library for raster geospatial data formats that presents a single
+ raster abstract data model to a calling application.
For information about Greenplum Database PostGIS extension support, see .
+ For information about PostGIS, see http://postgis.refractions.net/
+
+ For information about GDAL, see http://www.gdal.org.