First of all, you spelt mind wrong, it only has 1 m. Second, there's no such thing as a diagram of a mind map. A mind map is already a diagram. It'll be like making a mind map of a mind map.

a criminal mind map is a map criminals have in their minds of the places they know well

A mind map.

uses of maps,who uses map, type of map,part of map

To me the only disadvantage that mind map have is that it too much time consuming. But then again, i' also a beginner at it so i think if you get use to it, mind map will be much faster and easier way