def stere2cf(proj_dict):
    """Return the cf grid mapping from a stereographic proj dict.
    """
    return {'grid_mapping_name': 'stereographic',
        'latitude_of_projection_origin': eval(proj_dict['lat_0']),
        'longitude_of_projection_origin': eval(proj_dict['lon_0']),
        'scale_factor_at_projection_origin': eval(proj_dict.get('x_0',
        '1.0')), 'false_easting': eval(proj_dict.get('x_0', '0')),
        'false_northing': eval(proj_dict.get('y_0', '0'))}
