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# ST_SimplifyPreserveTopology

Simplifies a geometry and ensures that the result is a valid geometry having the same dimension and number of components as the input, and with the components having the same topological relationship.

<img src="https://mintcdn.com/wherobots/wLm_IRUSNlHZTHJP/images/sql-functions/ST_SimplifyPreserveTopology/ST_SimplifyPreserveTopology.svg?fit=max&auto=format&n=wLm_IRUSNlHZTHJP&q=85&s=d6e814e373ecbdc9ca688aaad5f1679d" alt="ST_SimplifyPreserveTopology" width="500" height="300" data-path="images/sql-functions/ST_SimplifyPreserveTopology/ST_SimplifyPreserveTopology.svg" />

## Return type

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

## Example

```sql theme={"system"}
SELECT ST_SimplifyPreserveTopology(ST_GeomFromText('POLYGON((8 25, 28 22, 28 20, 15 11, 33 3, 56 30, 46 33,46 34, 47 44, 35 36, 45 33, 43 19, 29 21, 29 22,35 26, 24 39, 8 25))'), 10)
```

```
POLYGON ((8 25, 28 22, 15 11, 33 3, 56 30, 47 44, 35 36, 43 19, 24 39, 8 25))
```