def scale_drop(coords, magnificationRatio):
    """ 
    Scales the coordinate based on the magnification ratio.
    
    coords = ndarray (N,i) where i is the dimensionality (i.e 2D)
    magnificationRatio = float - pixel to meters scaling conversion 
    """
    #changing units to meters
    scaledCoords = coords * [magnificationRatio*10**-3, 
                             magnificationRatio*10**-3] 
    return scaledCoords