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

# MULTIPOLYGON

A `MULTIPOLYGON` is a collection of [Polygons](/docs/stable/polygon.md).  MultiPolygons are useful for gathering a group of Polygons into one geometry. For example, you may want to gather the Polygons denoting a group of properties in a particular municipality.  Another use of MultiPolygons is to represent states or countries that include islands, or that are otherwise made up of non-overlapping shapes.

You can also store a \`\` with the following additional dimensions:

* A third dimension coordinate `Z` (`Z`).
* A measure coordinate `M` (`M`).
* Both a third dimension and a measure coordinate (`ZM`).

The `Z` and `M` dimensions can be accessed or modified using a number of [built-in functions](/docs/stable/functions-and-operators.md#spatial-functions), including:

* `ST_Z`
* `ST_M`
* `ST_Affine`
* `ST_Zmflag`
* `ST_MakePoint`
* `ST_MakePointM`
* `ST_Force3D`
* `ST_Force3DZ`
* `ST_Force3DM`
* `ST_Force4D`
* `ST_Snap`
* `ST_SnapToGrid`
* `ST_RotateZ`
* `ST_AddMeasure`

Note that CockroachDB's [spatial indexing](/docs/stable/spatial-indexes.md) is still based on the 2D coordinate system.  This means that:

* The Z/M dimension is not index accelerated when using spatial predicates.
* Some spatial functions ignore the Z/M dimension, with transformations discarding the Z/M value.

## Examples

A MultiPolygon can be created from SQL by calling the `st_geomfromtext` function on a MultiPolygon definition expressed in the [Well Known Text (WKT)](/docs/stable/architecture/glossary.md#wkt) format.

```sql theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
SELECT ST_GeomFromText('SRID=4326;MULTIPOLYGON(((-87.906471 43.038902, -95.992775 36.153980, -75.704722 36.076944, -87.906471 43.038902), (-87.623177 41.881832, -90.199402 38.627003, -82.446732 38.413651, -87.623177 41.881832), (-84.191605 39.758949, -75.165222 39.952583, -78.878738 42.880230, -84.191605 39.758949)))');
```

```
                                                                                                                                                                                                                            st_geomfromtext
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  0106000020E610000001000000010300000003000000040000006FF1F09E03FA55C0DFDFA0BDFA844540545227A089FF57C0791EDC9DB513424064B14D2A1AED52C0CCCF0D4DD90942406FF1F09E03FA55C0DFDFA0BDFA84454004000000A4A7C821E2E755C07C48F8DEDFF0444073309B00C38C56C038BF61A241504340E884D041979C54C0967A1684F2344340A4A7C821E2E755C07C48F8DEDFF044400400000001309E41430C55C07C2AA73D25E143401AA54BFF92CA52C0DFDC5F3DEEF9434028F04E3E3DB853C0A27A6B60AB70454001309E41430C55C07C2AA73D25E14340
(1 row)
```

## See also

* [Spatial objects](/docs/stable/spatial-data-overview.md#spatial-objects)
* [POINT](/docs/stable/point.md)
* [LINESTRING](/docs/stable/linestring.md)
* [POLYGON](/docs/stable/polygon.md)
* [MULTIPOINT](/docs/stable/multipoint.md)
* [MULTILINESTRING](/docs/stable/multilinestring.md)
* [GEOMETRYCOLLECTION](/docs/stable/geometrycollection.md)