> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wherobots.com/llms.txt
> Use this file to discover all available pages before exploring further.
# ST_Transform
Transform the Spatial Reference System / Coordinate Reference System of A, from SourceCRS to TargetCRS. If the `SourceCRS` is not specified, CRS will be fetched from the geometry using [ST\_SRID](/reference/wherobots-db/geometry-data/spatial-reference/ST_SRID).
Since `v1.9.0`, Sedona supports multiple CRS formats including EPSG codes, WKT1, WKT2, PROJ strings, and PROJJSON. Grid files for high-accuracy datum transformations are also supported.
For comprehensive details on supported CRS formats, grid file usage, and more examples, see [CRS Transformation](/reference/wherobots-db/geometry-data/crs-transformation).
## Signatures
```sql theme={"system"}
ST_Transform (A: Geometry, SourceCRS: String, TargetCRS: String)
```
```sql theme={"system"}
ST_Transform (A: Geometry, TargetCRS: String)
```
## Parameters
The input geometry.
The source coordinate reference system (e.g., `"EPSG:4326"`).
The target coordinate reference system (e.g., `"EPSG:3857"`).
## Return type
The resulting geometry.
## Example
```sql theme={"system"}
SELECT ST_AsText(ST_Transform(ST_GeomFromText('POLYGON((170 50,170 72,-130 72,-130 50,170 50))'),'EPSG:4326', 'EPSG:32649'))
```
```
POLYGON ((8766047.980342899 17809098.336766362, 5122546.516721856 18580261.912528664, 3240775.0740796793 -13688660.50985159, 4556241.924514083 -12463044.21488129, 8766047.980342899 17809098.336766362))
```
