def area(self) -> "GeoDataFrame":
        """
        Returns a GeoDataFrame containing the area of each geometry expressed in the units of the CRS.

        """
        return self._process_geometry_columns("ST_Area", rename_suffix="_area")


    def buffer(
        self,
        distance,
        resolution=16,
        cap_style="round",
        join_style="round",
        mitre_limit=5.0,
        single_sided=False,
        **kwargs,
    ) -> "GeoDataFrame":
        """
        Returns a GeoDataFrame with all geometries buffered by the specified distance.
        """
        return self._process_geometry_columns("ST_Buffer", rename_suffix="_buffered", distance=distance)