def rectCenter(rect):
    """Determine rectangle center.

    Args:
        rect: Bounding rectangle, expressed as tuples
            ``(xMin, yMin, xMax, yMax)``.

    Returns:
        A 2D tuple representing the point at the center of the rectangle.
    """
    (xMin, yMin, xMax, yMax) = rect
    return (xMin+xMax)/2, (yMin+yMax)/2