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