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\$1MakeEnvelope
<a name="ST_MakeEnvelope-function"></a>

ST\$1MakeEnvelope returns a geometry as follows:
+ If the input coordinates specify a point, then the returned geometry is a point. 
+ If the input coordinates specify a line, then the returned geometry is a linestring. 
+ Otherwise, the returned geometry is a polygon, where the input coordinates specify the lower-left and upper-right corners of a box. 

If provided, the spatial reference system identifier (SRID) value of the returned geometry is set to the input SRID value. 

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

```
ST_MakeEnvelope(xmin, ymin, xmax, ymax)
```

```
ST_MakeEnvelope(xmin, ymin, xmax, ymax, srid)
```

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

 *xmin*   
A value of data type `DOUBLE PRECISION`. This value is the first coordinate of the lower-left corner of a box. 

 *ymin*   
A value of data type `DOUBLE PRECISION`. This value is the second coordinate of the lower-left corner of a box. 

 *xmax*   
A value of data type `DOUBLE PRECISION`. This value is the first coordinate of the upper-right corner of a box. 

 *ymax*   
A value of data type `DOUBLE PRECISION`. This value is the second coordinate of the upper-right corner of a box. 

 *srid*   
A value of data type `INTEGER` that represents a spatial reference system identifier (SRID). If the SRID value is not provided, then it is set to zero. 

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

`GEOMETRY` of subtype `POINT`, `LINESTRING`, or `POLYGON`. 

The SRID of the returned geometry is set to `srid` or zero if `srid` isn't set. 

If *xmin*, *ymin*, *xmax*, *ymax*, or *srid* is null, then null is returned.

If *srid* is negative, then an error is returned. 

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

The following SQL returns a polygon representing an envelope defined by the four input coordinate values. 

```
SELECT ST_AsEWKT(ST_MakeEnvelope(2,4,5,7));
```

```
 st_astext
---------------
 POLYGON((2 4,2 7,5 7,5 4,2 4))
```

The following SQL returns a polygon representing an envelope defined by the four input coordinate values and an SRID value. 

```
SELECT ST_AsEWKT(ST_MakeEnvelope(2,4,5,7,4326));
```

```
 st_astext
----------------------------------
 SRID=4326;POLYGON((2 4,2 7,5 7,5 4,2 4))
```