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\$1GeogFromWKB
<a name="ST_GeogFromWKB-function"></a>

ST\$1GeogFromWKB 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\$1string*   
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\$1string* is null, then null is returned. 

If *wkb\$1string* 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))
```