Hi Nicolas, That's perfect, just what I needed.
Thanks very much. Regards, Richard. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nicolas Ribot Sent: 06 June 2011 11:27 To: PostGIS Users Discussion Subject: Re: [postgis-users] Mapping from x max, ymax, xmin, ymin > Hi, > > I have a table with 4 columns, x max, ymax, xmin, ymin coordinates for > the corner points of rectangles. > > Is there a way / function to convert these into a rectangle / polygon? > > Thanks, > > R. > Hi Franck, Sure: select st_makeBox2d( st_makepoint(xmin, ymin), st_makepoint(xmax, ymax)) will give you a BOX2D, ie a rectangle the same query, cast as a geometry, will convert it to a POLYGON (5 coordinates): select astext(st_makeBox2d( st_makepoint(0, 1), st_makepoint(2, 3))::geometry) Nicolas _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users Infoterra Ltd. Is part of the Astrium GEO-Information Services Division and a wholly owned subsidiary of Astrium, Europe's leading space systems and services specialist. Disclaimer. The information contained in this e-mail and its attachments are confidential and intended only for the use of the named addressee(s). If you are not the intended addressee, please do not read, copy, use or disclose this message or its attachments. If you have received this message in error, please notify the sender immediately and delete or destroy all copies of this message and attachments in all media. Any views or opinions expressed are solely those of the author and do not necessarily represent those of Infoterra Ltd and shall not form part of any binding agreement. Infoterra Limited a company registered in England under number 2359955 and having its registered office at Atlas House, 41 Wembley Road, Leicester, LE3 1UT. VAT number GB 476 0468 27. P Before printing, think about the environment _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
