Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# ST\$1Azimuth
<a name="ST_Azimuth-function"></a>

ST\$1Azimuth returns the north-based Cartesian azimuth using the 2D projections of the two input points. 

## Syntax
<a name="ST_Azimuth-function-syntax"></a>

```
ST_Azimuth(point1, point2)
```

## Arguments
<a name="ST_Azimuth-function-arguments"></a>

 *point1*   
A `POINT` value of data type `GEOMETRY`. The spatial reference system identifier (SRID) of *point1* must match the SRID of *point2*. 

 *point2*   
A `POINT` value of data type `GEOMETRY`. The SRID of *point2* must match the SRID of *point1*. 

## Return type
<a name="ST_Azimuth-function-return"></a>

A number that is an angle in radians of `DOUBLE PRECISION` data type. Values range from 0 (inclusive) to 2 pi (exclusive). 

If *point1* or *point2* is the empty point, then an error is returned. 

If either *point1* or *point2* is null, then null is returned. 

If *point1* and *point2* are equal, then null is returned. 

If *point1* or *point2* is not a point, then an error is returned. 

If *point1* and *point2* don't have the value for the spatial reference system identifier (SRID), then an error is returned. 

## Examples
<a name="ST_Azimuth-function-examples"></a>

The following SQL returns the azimuth of the input points. 

```
SELECT ST_Azimuth(ST_Point(1,2), ST_Point(5,6));
```

```
st_azimuth
-------------------
 0.7853981633974483
```