def translate_to_positive_numbers(ds_min,ds_max):
    """
    Take a min and max depth as either negavite elevations or positive depths and
    return positive depth values for shallowest and deepest.
    """
    if ds_min is not None and ds_max is not None: 
        shallowest_positive = min([abs(ds_min),abs(ds_max)])
        deepest_positive = max([abs(ds_min),abs(ds_max)])
    else:
        shallowest_positive = None
        deepest_positive = None
    if shallowest_positive and shallowest_positive < 10:
        shallowest_positive = 0
    return shallowest_positive, deepest_positive