Create a dual-axis map.
- Add one level of the hierarchy (for example, states) to the view by double-clicking the field in the Dimension pane. This will add the generated Latitude and Longitude fields onto the Column and Rows shelf.
- Add an additional instance of Latitude (generated) to the Rows shelf.
- Add the other desired level of the hierarchy (for example, city) to the Marks card for the second Latitude (generated) field.
- On the Rows shelf, right-click on the second Latitude (generated) field and select Dual Axis.