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I have a problem with the poligonization.

I have a table that contains the my borderstones. The second table defines the next and previous point. It is important because these are attribute datas.

Borderstones [srid=23700]

enter image description here

Direction

enter image description here

//the "allaspont" mean the borderstone_id

After that I created a VIEW, ther resoult:

CREATE OR REPLACE VIEW view_linestring AS SELECT w.id, w.szama, ST_SetSRID(ST_MakeLine((select ST_AsText(geom) from borderstone where id = c.allaspont) , (select ST_AsText(geom) from hatarko2 where id = c.kovetkezo)),23700) as geom FROM hatarko2 w, direction c WHERE w.id = c.id;

The resoult in qgis: These are linestrings between two point. enter image description here

I created a queries which retrive a polygon but it has no id so the qgis can not handle.

SELECT ST_Polygonize(geom) As geom FROM (SELECT * FROM public.view_linestringeov) As foo;

I need two create one polygon which is the border of my territories. Any idea?

  • 1
    Generally speaking if you need to create an id you can always just add row_number() over() as id or fix the original table so that it has an id to select. Don't use ST_AsText(geom), you don't want your geom as text when passing to other functions. Finally, your question is not very clear. – John Powell Oct 27 '15 at 11:52
  • So I have a table which contain the border stones with their attributes. The second table is contain the direction. The previous and the next landmark for each stone. At first I created line strings between each neighbor border stones. This tables represent a village border and I'd like to create a polygon from these data. – Kgerg0 Oct 28 '15 at 11:04

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