'Convert an ``(x, y)`` position in the original large array to
the ``(x, y)`` position in the cutout array.
Parameters
original_position : tuple
The ``(x, y)`` pixel position in the original large array.
Returns
cutout_position : tuple
The corresponding ``(x, y)`` pixel position in the cutout
array.'

def to_cutout_position(self, original_position):

    return tuple(((original_position[i] - self.origin_original[i]) for i in [0, 1]))
