﻿---
title: ES|QL ST_ENVELOPE function
description: 
url: https://www.elastic.co/elastic/docs-builder/docs/2961/reference/query-languages/esql/functions-operators/spatial-functions/st_envelope
products:
  - Elasticsearch
---

# ES|QL ST_ENVELOPE function
<applies-to>
  - Elastic Cloud Serverless: Preview
  - Elastic Stack: Preview
</applies-to>


## Syntax

![Embedded](https://www.elastic.co/elastic/docs-builder/docs/2961/reference/query-languages/esql/images/functions/st_envelope.svg)


## Parameters

<definitions>
  <definition term="geometry">
    Expression of type `geo_point`, `geo_shape`, `cartesian_point` or `cartesian_shape`. If `null`, the function returns `null`.
  </definition>
</definitions>


## Description

Determines the minimum bounding box of the supplied geometry.

## Supported types


| geometry        | result          |
|-----------------|-----------------|
| cartesian_point | cartesian_shape |
| cartesian_shape | cartesian_shape |
| geo_point       | geo_shape       |
| geo_shape       | geo_shape       |


## Example

```esql
FROM airport_city_boundaries
| WHERE abbrev == "CPH"
| EVAL envelope = ST_ENVELOPE(city_boundary)
| KEEP abbrev, airport, envelope
```


| abbrev:keyword | airport:text | envelope:geo_shape                                                                  |
|----------------|--------------|-------------------------------------------------------------------------------------|
| CPH            | Copenhagen   | BBOX (12.45299999602139, 12.639799928292632, 55.732699991203845, 55.63179998192936) |