[postgis-users] Create new column with other SRID

lisek lichu lisek.lichu at gmail.com
Fri Oct 31 08:19:17 PDT 2008


Hello i have a little problem creating a new column for my table and
inserting there new data.

I have a talbe:

CREATE TABLE "axes" (
gid serial PRIMARY KEY,
"name" varchar(100));
SELECT AddGeometryColumn('','axes','the_geom','27492','LINESTRING',2);

and this table if full of data

now i want to add new column with another SRID like wgs84 srid = 4326

SELECT AddGeometryColumn('','axes','the_geom_wgs84','4326','LINESTRING',2);

and now i need to create a query that reads each row from column the_geom,
converts it by Transform(the_geom, 4326) and put into a new kolumn
the_geom_wgs84 in the same row.

Do You have an idea if it is possible?

I tried to do something like that:

SELECT AddGeometryColumn('','axes','the_geom_wgs84','4326','LINESTRING',2);
INSERT INTO "axes" (the_geom_wgs84) VALUES (select
AsText(Transform(the_geom,4326)) from axes)
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