Getting the orientation in degrees of an Oriented Point in Oracle - oracle

Question

In my database I have some Oriented Point type geometries.
For example:
{3001,4326,null,{1,1,1,4,1,0},{32.4302549,37.5066298,0,0.16,-0.92,0}}
If I'm correct, my gps coordinates are
lat: 32.4302549, lon: 37.5066298
and the virtual point determining the orientation is a Point(0.16 -0.92 0)
I would like to get the orientation in degrees or radians using a query.
So far I can extract the orientation point:
SELECT SDO_UTIL.GET_COORDINATE(MY_GEOMETRY_COLUMN, 2) as orientation_vector
FROM GCOL;
But don't know how to get the orientation. I know it can be calculated vie arctan2 function, but don't know the correct oracle syntax.

Answer 1

You need to use ATAN2 to get radians with the correct quadrant.
WITH X AS (
SELECT
SDO_GEOMETRY(3001,4326,NULL,
SDO_ELEM_INFO_ARRAY(1, 1, 1, 4, 1,0),
SDO_ORDINATE_ARRAY(32.4302549, 37.5066298, 0, 0.16, - 0.92,0)) AS G
FROM DUAL
)
SELECT
ATAN2(
SDO_UTIL.GET_COORDINATE(G, 2).SDO_POINT.Y ,
SDO_UTIL.GET_COORDINATE(G, 2).SDO_POINT.X)
FROM X;
To convert to degrees please see SDO_UTIL.CONVERT_UNIT .

Answer 2

Based on #David Lapp's answer, I'm posting a solution which works for me. In my application I need 0 degrees to point upwards. The correct order of parameters to the ATAN2() function is first X, then Y.
I converted the result to degrees and rounded to 2 decimal points.
WITH X AS (
SELECT MY_GEOMETRY_COLUMN as G
from MY_GEOMETRY_TABLE
)
SELECT ROUND(SDO_UTIL.CONVERT_UNIT(
ATAN2(
SDO_UTIL.GET_COORDINATE(G, 2).SDO_POINT.X,
SDO_UTIL.GET_COORDINATE(G, 2).SDO_POINT.Y),
'Radian', 'Degree'),
2) as orientation;