def to_bbox_str(llo: float, lla: float, mlo: float, mla: float) -> str:
    """
    Given (min_lon, min_lat, max_lon, max_lat) bounding box values, returns a string representation understood by
    Mapillary APIs.
    """
    return ",".join([str(llo), str(lla), str(mlo), str(mla)])