# xarray.register_dataset_accessor

### xarray.register_dataset_accessor(name)[[source]](https://github.com/pydata/xarray/blob/main/xarray/core/extensions.py#L81-L124)

Register a custom property on xarray.Dataset objects.

* **Parameters:**
  **name** ([`str`](https://docs.python.org/3/builtins/stdtypes.html#str)) – Name under which the accessor should be registered. A warning is issued
  if this name conflicts with a preexisting attribute.

### Examples

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In your library code:

```pycon
>>> @xr.register_dataset_accessor("geo")
... class GeoAccessor:
...     def __init__(self, xarray_obj):
...         self._obj = xarray_obj
...
...     @property
...     def center(self):
...         # return the geographic center point of this dataset
...         lon = self._obj.latitude
...         lat = self._obj.longitude
...         return (float(lon.mean()), float(lat.mean()))
...
...     def plot(self):
...         # plot this array's data on a map, e.g., using Cartopy
...         pass
...
```

Back in an interactive IPython session:

```pycon
>>> ds = xr.Dataset(
...     {"longitude": np.linspace(0, 10), "latitude": np.linspace(0, 20)}
... )
>>> ds.geo.center
(10.0, 5.0)
>>> ds.geo.plot()  # plots data on a map
```

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#### SEE ALSO
[`register_dataarray_accessor`](xarray.register_dataarray_accessor.html.md#xarray.register_dataarray_accessor)