Ahmet, If you only care about distance, length and area measurement, you may want to try PostGIS 1.5 which has the new geography type specifically designed for this kind of thing.
Help us stress test it now or you can wait a couple of weeks for it to be officially released. If you want to do lots of geometry processing then you'll probably want to stick with geometry, but you'll need to learn a bit about spatial ref systems. It really depends the specific geographic location of your data and what you plan to do with it which srid you should use. Anyrate check out our FAQ on geography http://www.postgis.org/documentation/manual-svn/ch03.html#id2836961 Hope that helps, Regina -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ahmet temiz Sent: Thursday, December 31, 2009 2:56 AM To: [email protected] Subject: [postgis-users] suitable projection hello Do I have to change my geographic projection (4326) for calculating area and length of some features. Which projection do I have to transform from geographic projection. Ahmet Temiz regards Happy New Year _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
