[postgis-users] Polygonize from a set of linestring

[luca marletta]

Hi List,
I'm new in postgis functions but I'd like to test it for solving an issue.

I have a big reticule of LINESTRINGS that cross each other. Tehy are
not boundaries but just collections of line quite randomly set.

I need to create a polygon for each area closed that the collections
of linestrings develop.

I tryed already to polygonize but with poor results and not at all understood.

CREATE OR REPLACE VIEW particelle AS
 SELECT dump.path, dump.geom
   FROM dump(( SELECT polygonize(catasto_linee.the_geom) AS polygonize
           FROM catasto_linee
          WHERE catasto_linee.layer::text <> '1'::text)) dump(path, geom);

the above produce 2 polygon from 2000 possible. I really don't get the
reason and the rule

can someone help me please on this topic?

-- 
luca marletta
www.beopen.it