docs/api/sql/Raster-Output/RS_AsBase64.md

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# RS_AsBase64

Introduction: Returns a base64 encoded string of the given raster. If the datatype is integral then this function internally takes the first 4 bands as RGBA, and converts them to the PNG format, finally produces a base64 string. When the datatype is not integral, the function converts the raster to TIFF format, and then generates a base64 string. To visualize other bands, please use it together with `RS_Band`. You can take the resulting base64 string in [an online viewer](https://base64-viewer.onrender.com/) to check how the image looks like.

!!!Warning
    This is not recommended for large files.

Format:

`RS_AsBase64(raster: Raster, maxWidth: Integer)`

`RS_AsBase64(raster: Raster)`

Return type: `String`

Since: `v1.5.0`

SQL Example

```sql
SELECT RS_AsBase64(raster) from rasters
```

Output:

```
iVBORw0KGgoAAAA...
```