select points of polygons - Mailing list pgsql-sql

From Andreas Gaab
Subject select points of polygons
Date
Msg-id 48DA836F3865C54B8FBF424A3B775AF6FDE728EC@Exchange-Server.scanlab-intern.de
Whole thread Raw
Responses Re: select points of polygons
List pgsql-sql

Hi there,

 

 

I have polygons with 5 points (left, center, right, top, bottom)

 

Now I would like to select an individual point out of the polygon. Are there any functions to provide this in an readable manner other than:

 

e.g. SELECT replace(split_part(p::text,',(',1),'((','(')::point as point FROM (

SELECT '((0.001329116037,0.007391900417),(0.001371765621,0.1608393682),(0.1502391498,0.00733744679),(0.001500387404,-0.1468751078),(-0.1472653422,0.007425591447))'::polygon as p) as poly

 

è (0.001329116037,0.007391900417)

 

 

Thanks

Andreas

 

 

___________________________________________________________________________

 

SCANLAB AG

Dr. Andreas Simon Gaab

Entwicklung • R & D

 

Siemensstr. 2a • 82178 Puchheim • Germany

Tel. +49 (89) 800 746-513 • Fax +49 (89) 800 746-199

mailto:a.gaab@scanlab.dewww.scanlab.de

 

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