My question is probably amazinlgy stupid, but I can't find the answer myself.
I would like to extract from a database the latitude and longitude of points. For now, I'm getting x(the_geom) and y(the_geom), and I would like to know what is the coordinate system of the results I get.
How can I know this?
Best Answer
To get the coordinate system of your table use the following:
For your second question, I am not sure if EPSG:4283 is by default defined in spatial_ref_sys table. In case it is not, you can use a INSERT command. This definition is from spatialreference.org:
Now use the ST_Transform(the_geom,4283) command.