def getRotatedSize(corners, angle):
    """ Determine the size of a rotated (meta)image."""
    if angle:
        _rotm = fileutil.buildRotMatrix(angle)
        # Rotate about the center
        _corners = np.dot(corners, _rotm)
    else:
        # If there is no rotation, simply return original values
        _corners = corners

    return computeRange(_corners)