> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firebolt.io/llms.txt
> Use this file to discover all available pages before exploring further.

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.firebolt.io/feedback

```json
{
  "path": "/reference-sql/functions-reference/geospatial/st_asewkb",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

> Reference material for ST_ASEWKB function

# ST_ASEWKB

Converts shapes of the `GEOGRAPHY` data type to the [extended Well-Known Binary (EWKB)](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry#Format_variations) format using Spatial Reference Identifier (SRID) 4326, which corresponds to the [WGS84](https://en.wikipedia.org/wiki/World_Geodetic_System#WGS_84) coordinate system.

## Syntax

```sql theme={"theme":{"light":"github-light","dark":"github-dark"}}
ST_ASEWKB(<object>)
```

## Parameters

| Parameter  | Description                                       | Supported input types |
| :--------- | :------------------------------------------------ | :-------------------- |
| `<object>` | The `GEOGRAPHY` object to convert to EWKB format. | `GEOGRAPHY`           |

## Return Type

`ST_ASEWKB` returns a value of type `BYTEA`.

## Example

The following code example creates a `GEOGRAPHY` object from the WKT representation of a Point at specified longitude and latitude coordinates and converts it to EWKB format:

```sql theme={"theme":{"light":"github-light","dark":"github-dark"}}
SELECT ST_ASEWKB(ST_GEOGFROMTEXT('POINT(-73.98551041593687 40.75793403395676)')) AS result
```

**Returns**

| result (BYTEA)                                         |
| :----------------------------------------------------- |
| '\x0101000020e61000003d94479a127f52c0502f80fb03614440' |