[postgis-users] Convert linestring to polygon
Patricio Cifuentes Ithal
pcifuentes at siigsa.cl
Thu Apr 13 08:18:19 PDT 2006
test with SetSRID(Geometry), SetSRID replace BOX3D and BuildArea
----- Original Message -----
From: <strk at refractions.net>
To: "PostGIS Users Discussion" <postgis-users at postgis.refractions.net>
Sent: Thursday, April 13, 2006 4:39 AM
Subject: Re: [postgis-users] Convert linestring to polygon
> A better alternative is 'BuildArea(Geometry)'.
> Availability: 1.1.0 - requires GEOS >= 2.1.0.
> You'd collect() the input and pass the collection to BuildArea.
> On Thu, Apr 13, 2006 at 09:39:52AM +0200, Bart van den Eijnden (OSGIS)
> > Yes, look for a function called polygonize.
> > Polygonize(geometry set)
> > Aggregate. Creates a GeometryCollection containing possible polygons
> > formed from the costituent linework of a set of geometries.
> > Availability: 1.0.0RC1 - requires GEOS >= 2.1.0.
> > Best regards,
> > Bart
> > > I have a postgis table containing linestring geometries.
> > > Some of these linestrings are in fact closed polygon.
> > > Is there a function to convert these closed linestring to a polygon?
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