From the results page of the Command Center, and select the layer that you want to report over. You can then select the specific area that you want to see. This filters the data.

This short video provides an overview of the map features in

Here are also the steps that you can take. Go to your activity and select the Responses tab, then select the Create Report tab where you can run the report over selected areas, or the entire region.  

And, you can also export all of the data, including custom questions, for the filtered area.