[postgis-users] visually linking the polygons of multipolygon layer

[Obe, Regina]

First thing that comes to mind to me is string the centroids together.
 
Something like
 
SELECT gid, ST_MakeLine(ST_Centroid(the_geom)) As arc
FROM (SELECT gid, (ST_Dump(the_geom)).geom As the_geom
                FROM multipolytable
) As foo
GROUP BY gid
 
Hope that helps,
Regina

________________________________

From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of erik
Sent: Tuesday, September 16, 2008 9:06 AM
To: PostGIS Users Discussion
Subject: [postgis-users] visually linking the polygons of multipolygon
layer


Hi,

I'm not sure I know how to formulate this
I have a set of Multipolygons. I'd like to link somehow the polygons of
each multipolygon  with a "string", an arc, that expresses their
belonging to the same polygon.

Is this possible, is there some predefined function that could
accomplish this?

Many thanks,

Erik



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