Map contains basic geometry setup in a special way that lets us compute a few things relatively quickly.   
 
ex. if we are standing at point x, y, z what would be the most likely z position of this location based on the geometry. 
 
ex. if we are standing at x, y, z of a point can we see x, y, z of a completely different point in space without colliding with the world, aka do we have clear line of sight from one point to another. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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