ST_AsMVT Document JSONB support

References #3749

git-svn-id: http://svn.osgeo.org/postgis/trunk@15390 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/reference_output.xml b/doc/reference_output.xml
index 77458f189bf3f3a91b5e736120605d93d3af0a11..bc84463461c9dbb2bdd0961d2c63e0a3779d1a37 100644 (file)
--- a/doc/reference_output.xml
+++ b/doc/reference_output.xml
@@ -1422,6 +1422,11 @@ SELECT ST_GeoHash(ST_SetSRID(ST_MakePoint(-126,48),4326),5);
                Other row data will be encoded as attributes.
                </para>
 
+               <para>The <ulink url="https://www.mapbox.com/vector-tiles/">Mapbox Vector Tile</ulink> format can store features with a different
+               set of attributes per feature. To make use of this feature supply a JSONB column in the row data containing Json objects one level
+               deep. The keys and values in the object will be parsed into feature attributes.
+               </para>
+
                <para><varname>name</varname> is the name of the Layer</para>
                <para><varname>extent</varname> is the tile extent in screen space as defined by the specification. If NULL it will default to 4096.</para>
                <para><varname>geom_name</varname> is the name of the geometry column in the row data.</para>