Have you found the solution for your problem?
No, I didn't found any solution yet.
Just for clarification, you have those region specific charts in other dashboards than your welcome page? And you want to jump from one dashboard to another?
Yes, I have other charts in other dashboards and those are published as Tabbed View. I want to jump from one to another dashboard by clicking on specific area of the Map.
Have you played with action filters yet?