Amazon Redshift will no longer support the use of Python UDFs after June 30, 2026. We will start enforcing it in phases. For more information on the details of Python end of life and migration options, 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/) that was published on June 30, 2025. 

# ST\_GeogFromWKB
<a name="ST_GeogFromWKB-function"></a>

ST\_GeogFromWKB constructs a geography object from a hexadecimal well-known binary (WKB) representation of an input geography. 

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

```
ST_GeogFromWKB(wkb_string)
```

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

 *wkb\_string*   
A value of data type `VARCHAR` that is a hexadecimal WKB representation of a geography.

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

`GEOGRAPHY`

If the SRID value is provided it is set to the provided value. If SRID is not provided, it is set to `4326`. 

If *wkb\_string* is null, then null is returned. 

If *wkb\_string* is not valid, then an error is returned. 

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

The following SQL constructs a geography from a hexadecimal WKB value. 

```
SELECT ST_AsEWKT(ST_GeogFromWKB('01030000000100000005000000000000000000000000000000000000000000000000000000000000000000F03F000000000000F03F000000000000F03F000000000000F03F000000000000000000000000000000000000000000000000'));
```

```
 st_asewkt
------------------------------------------
 SRID=4326;POLYGON((0 0,0 1,1 1,1 0,0 0))
```