gamecorpstudio, The minimap inside the globe is just for looks really. Remember that appearances are important too!
But yes, the same can be achieved easily, but to be able to do it will be quite odd, because you'd have to make a background the size of the viewport, and shrink it to the bottom when the player loses health. It'll look cool, but it has a weird application.
Basically, everything inside the globe is what is inside the viewport. I might be able to change it, but it wouldn't work for my purposes if I did.