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# ST_PointOnSurface

Returns a POINT guaranteed to lie on the surface.

<img src="https://mintcdn.com/wherobots/wLm_IRUSNlHZTHJP/images/sql-functions/ST_PointOnSurface/ST_PointOnSurface.svg?fit=max&auto=format&n=wLm_IRUSNlHZTHJP&q=85&s=663fcb38c6aef8faa26ce525a4aaaf9d" alt="ST_PointOnSurface" width="500" height="300" data-path="images/sql-functions/ST_PointOnSurface/ST_PointOnSurface.svg" />

## Signatures

```sql theme={"system"}
ST_PointOnSurface(A: Geometry)
```

## Parameters

<ParamField body="A" type="Geometry" required>
  The input geometry.
</ParamField>

## Return type

<ResponseField type="Geometry">
  The resulting geometry.
</ResponseField>

## Example

```
SELECT ST_AsText(ST_PointOnSurface(ST_GeomFromText('POINT(0 5)')));
 st_astext
------------
 POINT(0 5)

SELECT ST_AsText(ST_PointOnSurface(ST_GeomFromText('LINESTRING(0 5, 0 10)')));
 st_astext
------------
 POINT(0 5)

SELECT ST_AsText(ST_PointOnSurface(ST_GeomFromText('POLYGON((0 0, 0 5, 5 5, 5 0, 0 0))')));
   st_astext
----------------
 POINT(2.5 2.5)

SELECT ST_AsText(ST_PointOnSurface(ST_GeomFromText('LINESTRING(0 5 1, 0 0 1, 0 10 2)')));
   st_astext
----------------
 POINT Z(0 0 1)

```