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title: RS_DimNames
description: Returns the ordered list of dimension names for a raster band.
kernels:
  - returns: list<utf8>
    args: [raster]
  - returns: list<utf8>
    args:
    - raster
    - name: band
      type: int
      description: Band index (1-based). A null or out-of-range index returns null.
---

::: callout-warning
**Experimental.** This function is experimental; its behavior may change without notice.
:::

## Description

Returns the ordered list of dimension names for a raster band. Standard 2D
rasters have dimensions `["y", "x"]`. N-dimensional rasters may include
additional dimensions such as `time`, `pressure`, `wavelength`, etc.

The dimension names correspond to the entries in
[RS_Shape](rs_shape.qmd) — the i-th name matches the i-th size.

When the band index is omitted, all bands must agree on their dimension
names; if they disagree, an error is returned prompting the user to specify
a band index.

## Examples

```sql
SELECT RS_DimNames(RS_Example());
```