Years ago I helped a company that worked in the financial industry review where their current locations are and where FDIC Banks were located. The GIS data was available for free from the FDIC. If you spend some time you can merged the files together and look at it longitudinally. The below map was particularly helpful in deciding where a new branch/office should be located. I also imported the locations of competitors however I cannot share this data as it is too revealing.
I used Microsoft’s MapPoint to create the below map. It is no longer with us however this would be easy to repeat with Google Maps.
Here’s a great book to get ideas on conveying data visually