I want Postgres/PostGIS queries to convert UTM coordinates from UTM 43N projection to Decimal Degrees 32643 projection.

select ST_X(the_geom), ST_X(the_geom) from table
  • ST_Transform is what you are looking for. Commented Feb 11, 2015 at 7:41

1 Answer 1


You need to use ST_Transform. For example, taking a point somewhere in Southern India (which I'm guessing from the UTM zone and your profile is the area you are interesting in)

SELECT ST_X(geom), ST_Y(geom) 
(SELECT  ST_Transform(ST_SetSrid(ST_MakePoint(627516, 1413990), 32643), 4326) as geom) g;

or in your case, if you have a table already with coordinates in:

SELECT col1, col2, ST_X(the_geom), ST_Y(the_geom)
(SELECT col1, col2, ST_Transform(the_geom, 4326) as the_geom from sometable) g;

If you don't have your geometry column's SRID set to 32643, you can either wrap this in ST_SetSRID, as in the first example, or run UpdateGeometrySRID first to put your table's geometry column in the correct projection -- good practice anyway, to have this explicitly set.

  • Thanks John!!. If i want to display one more column from the table in the above query then please share the query.
    – Adarsh L
    Commented Feb 11, 2015 at 8:42
  • You just select them in the subquery and then in the outer query. Post updated. Commented Feb 11, 2015 at 8:47
  • Possibly, can you ask a new question? Commented Feb 11, 2015 at 9:19

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.