Kibana Maps for custom data

Hello all,
I have a data like below in my ES

 NodeName           State             Country               Value
  LS02            Virginia             US                     56
  LS04            NewYork              US                     89
  IN56            Delhi                India                  77

So I want to create a map based on the states, with its corresponding Value.
I am working with a ELK 7.2.0 set.
I'm rather new to Kibana, I'd very much like to have a kick start on what are the things I need to do.
Hope I can get an Idea of working this out!
Thanks in Advance :slight_smile: