[postgis-users] Correct use of ST_Transform

[Simon Greener]

Ben,

> So the query that I have constructed would be the way to transform records
> from one coord system to another?

It should do if the data going in has the right SRID.

Best to test it with something like this to make sure it is OK before continuing.

select st_srid(a.geom) as original_srid, ST_Srid(st_transform(a.geom, 4283)) as transform_srid, ST_AsText(ST_Transform(a.geom,4283)) as tgeom
  from (select ST_GeomFromText('LINESTRING(606388.046000039 5335648.05400051,606468.307000043 5335634.86000051)',28355) as geom) as a;

28355;4283;"LINESTRING(148.287098370457 -42.1240578238575,148.288071549293 -42.1241657301262)"

Simon
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