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| |
| # ST_H3ToGeom |
| |
| Introduction: Return the result of H3 function [cellsToMultiPolygon(cells)](https://h3geo.org/docs/api/regions#cellstolinkedmultipolygon--cellstomultipolygon). |
| |
| Converts an array of Uber H3 cell indices into an array of Polygon geometries, where each polygon represents a hexagonal H3 cell. |
| |
| !!!Hint |
| To convert a Polygon array to MultiPolygon, use [ST_Collect](../Geometry-Editors/ST_Collect.md). However, the result may be an invalid geometry. Apply [ST_MakeValid](../Geometry-Validation/ST_MakeValid.md) to the `ST_Collect` output to ensure a valid MultiPolygon. |
| |
| An alternative approach to consolidate a Polygon array into a Polygon/MultiPolygon, use the [ST_Union](../Overlay-Functions/ST_Union.md) function. |
| |
| Format: `ST_H3ToGeom(cells: Array[Long])` |
| |
| Return type: `Array<Geometry>` |
| |
| Since: `v1.6.0` |
| |
| Example: |
| |
| ```sql |
| SELECT ST_H3ToGeom(ST_H3CellIDs(ST_GeomFromWKT('POINT(1 2)'), 8, true)[0], 1, true)) |
| ``` |
| |
| Output: |
| |
| ``` |
| [POLYGON ((1.0057629565405093 1.9984665139177547, 1.0037116327309097 2.0018325249140068, 0.999727799357053 2.001163270465665, 0.9977951427833316 1.997128228393235, 0.9998461908217928 1.993762152933182, 1.0038301712104316 1.9944311839965523, 1.0057629565405093 1.9984665139177547))] |
| ``` |
| |
|  |
