If you are sure that all your polygons are in actuality single polygons (you
can check using numgeometries()) you can just use geometryn(geom,1) to get
the data as single polygon. Note that you likely have a constraint on your
table that would have to be dropped to run that in an update.
You can
Use ST_GeometryN(geometry, int) if you're sure you only have one
geometry in them.
http://postgis.refractions.net/docs/ch06.html#id2964448
You can test this by:
SELECT ST_NumGeometries(the_geom), count(*)
FROM my_tbl
GROUP BY ST_NumGeometries;
If you don't have any check constraints on your tab
geometryn(the_geom,1)
-Eric
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of George Silva
Sent: Wednesday, April 16, 2008 3:08 PM
To: postgis-users@postgis.refractions.net
Subject: [postgis-users] Multipolygons to Polygon
Hello everyone,
I have a
Hello everyone,
I have a converted dataset that has only polygons, but they were imported
from ArcGIS as Multipolygons. I need them to become simple polygons. (I dont
have any real multi-polygons in the table - they were just imported that
way.
How can i convert this dataset to regular tyep polyg
