Did you know your data can be a Donut ?
In ARLAS-wui, you can represent data as a Donut. When you select the arcs you filter the data.
The Donut handles data tree which allows you to represent multiple circles. All the levels participate in filtering.
Donut has also a searchable legend that helps find smaller arcs.
Also you can filter the data by clicking on the legend or on the donut.