The following functions are available to process S2 indexes in Studio expressions.

| Function                   | Return Type | Description                                                        |
|----------------------------|-------------|--------------------------------------------------------------------|
| `s2IsValid(s2)`           | `bool`      | Returns `true` if the given S2 cell is valid.                     |
| `geoToS2(lat, lng, level)`| `s2`       | Returns an S2 index at the given lat/lng coordinate at the specified resolution level. |
| `s2ToLat(s2)`             | `real`      | Returns the latitude of the S2 point index.                       |
| `s2ToLng(s2)`             | `real`      | Returns the longitude of the S2 point index.                      |
| `s2ToGeo(s2)`             | `geojson`   | Returns a GeoJSON point feature for the S2 index.                 |
| `s2ToBounds(s2)`          | `geojson`   | Returns a GeoJSON polygon feature for the S2 polygon.             |
| `s2ToParent(s2, level)`   | `s2`       | Returns the parent S2 index at the given resolution level.        |