You want to enter the next level of customer visualiation? Here you go.
With the Google Maps integration you will be able to see all customer on a map (customers with open tickets marked in a extra color). The map is available in Dashboard and also as an own dedicated one large page map (just click on “more” in dashboard).
For more see OTRS Google Maps Customer Integrations http://edenhofer.de/p/google-maps/
Enjoy!
-Martin