There is an amazing Viz of the day on 12/20/2016 showing the mortality rate change in USA on certain diseases. Excellently designed!
There are over 3142 counties on each of the 6 maps.  I would like to view some of the counties in details. So I added a mechanism to close in. This can be the basis for anyone who wants to add further functionalities.

The steps to do it are:
- drag all the 6 heat maps into a floating vertical container
- create a separate filled map for counties
- add another floating vertical container on top of the above one and drag the filled map to it
- create a button to close the pop-up map.
- create one action filter for pop-up view and another for going back to the original view.

Click the image below to see it in action or download the workbook.
The resulting viz got some small issues. I hope someone can enlighten me:

1.Currently we need to click twice to close the popup map and go back to the original view. I wish I need to click the button (at the top right corner) only once. Maybe we need some action filter wizardry. Anyone can help?

2.In the popup map, if the view is changed, +/- 'ed, then the next time we click on a county in the heat map, the view won't be focused. Need to reset the view to focus.

In the process, I found that 3 counties can't be found in the map. The county names are new while the map data is from 2010. I had to do the following matching:

Petersburg Borough -> Petersburg
Kusilvak Census Area -> Wade Hampton
Sainte Genevieve County -> Ste Genevieve

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