Why do you want to remove it?
by removing it i will be able to plot latitude and longitude on worldmap.
Having it there will not affect the worldmap node.
so by not removing _msgid also still i am not able to see coordinates on worldmap.
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To repeat what @Colin said
...the presence of _msgid in the msg object has nothing to do with seeing or not "seeing coordinates on worldmap".
I suggest you either rename this thread OR start a new thread with the title "not seeing coordinates on worldmap" so that the right people with worldmap experience read the thread.
yes @steve sure i will create new a thread definately. 
