def load_map(file_name: str, map_name: str, num_levels: int=4, sigma: float=1.0
    ):
    """Loads an image map for further reading. 

    :param file_name: The name of the image file. 
    :type file_name: str
    :param map_name: The name that will be used to access this image. 
    :type map_name: str
    :param num_levels: The number of levels in the map pyramid (default = 4). If num_levels == 0, the complete pyramid is built. 
    :type num_levels: int
    :param sigma: The sigma value of the gaussian function. 
    :type sigma: float
    """
    pass
