> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-properties/st_envelope.md).

# ST\_ENVELOPE

## Syntax

```bnf
ST_ENVELOPE(g)
ENVELOPE(g)
```

## Description

Returns the Minimum Bounding Rectangle (MBR) for the geometry value `g`. The result is returned as a Polygon value.

The polygon is defined by the corner points of the bounding box:

```
POLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))
```

`ST_ENVELOPE()` and `ENVELOPE()` are synonyms.

## Examples

```sql
SELECT AsText(ST_ENVELOPE(GeomFromText('LineString(1 1,4 4)')));
+----------------------------------------------------------+
| AsText(ST_ENVELOPE(GeomFromText('LineString(1 1,4 4)'))) |
+----------------------------------------------------------+
| POLYGON((1 1,4 1,4 4,1 4,1 1))                           |
+----------------------------------------------------------+
```

<sub>*This page is licensed: GPLv2, originally from*</sub> [<sub>*fill\_help\_tables.sql*</sub>](https://github.com/MariaDB/server/blob/main/scripts/fill_help_tables.sql)

{% @marketo/form formId="4316" %}