> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.sigmacomputing.com/docs/geography/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.sigmacomputing.com/_mcp/server.

# Geography

> Use the Sigma Geography function to convert GeoJSON or WKT data into the Geography data type.

The **Geography** function converts [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) or [WKT](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry) data into the [Geography](/docs/data-types-and-formats) data type.

> **Info**
>
> This function isn't compatible with all data platform connections. To check if your connection supports it, see [Supported data platforms and feature compatibility](/docs/region-warehouse-and-feature-support#supported-data-platforms-and-feature-compatibility).

## Syntax

In GeoJSON and the `Geography` data type, coordinate order is always `longitude, latitude`.

```sigma
Geography(value)
```

The function arguments are:

<dl>
  <dt>
    value
  </dt>

  <dd>
    Required
  </dd>

  <dd>
    The content to convert to the 

    [Geography](/docs/data-types-and-formats)

     data type.
  </dd>

  <dd>
    Must be valid GeoJSON or WKT. Otherwise, the function returns 

    `Null`

    .
  </dd>
</dl>

## Notes

* Valid coordinates have longitude values between `-180` and `180`, and latitude values between `-90` and `90`.
  * Values outside of these ranges return `null`, and do not appear on maps like [Map - Geography](/docs/maps).
* On Databricks connections, the longitude value `180` is not valid. It is equivalent to the longitude value `-180`.

## Examples

```sigma
Geography('{"coordinates":[-78,42],"type":"Point"}')
```

Converts the GeoJSON string `'{"coordinates":[-78,42],"type":"Point"}'` to the Geography data type, and returns `POINT(-78 42)`.

```sigma
Geography([GeoJSON])
```

The **Geography** function returns the following values for the **GeoJSON** column:

![Table comparing GeoJSON point and polygon strings with their converted Geography values in well-known text format.](/_fern-files/sigma.docs.buildwithfern.com/5396a8f3e65dc2aaf9d91ba2696ec7a866901eb8bb57b62709d0ddf7747109c4/assets/docs-images/6bf01c8-1.png)

```sigma
Geography("POINT(-78 42)")
```

Converts the WKT string `"POINT(-78 42)"` to the Geography data type, and returns `POINT(-78 42)`.

```sigma
Geography([WKT])
```

The **Geography** function returns the following values for the **WKT** column:

![Table comparing point and polygon values in well-known text format with their converted Geography values.](/_fern-files/sigma.docs.buildwithfern.com/66842151ba951769a9c12b7ea9100c4e38677f666859983831b12ac259529b77/assets/docs-images/1b3357e-2.png)

## Related resources

* [Json](/docs/json)
* [Text](/docs/text)
* [Geography functions](/docs/geography-functions)

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