osbng.indexing.PREFIXES

osbng.indexing.PREFIXES: ndarray[tuple[Any, ...], dtype[str_]] = array([['SV', 'SW', 'SX', 'SY', 'SZ', 'TV', 'TW'],        ['SQ', 'SR', 'SS', 'ST', 'SU', 'TQ', 'TR'],        ['SL', 'SM', 'SN', 'SO', 'SP', 'TL', 'TM'],        ['SF', 'SG', 'SH', 'SJ', 'SK', 'TF', 'TG'],        ['SA', 'SB', 'SC', 'SD', 'SE', 'TA', 'TB'],        ['NV', 'NW', 'NX', 'NY', 'NZ', 'OV', 'OW'],        ['NQ', 'NR', 'NS', 'NT', 'NU', 'OQ', 'OR'],        ['NL', 'NM', 'NN', 'NO', 'NP', 'OL', 'OM'],        ['NF', 'NG', 'NH', 'NJ', 'NK', 'OF', 'OG'],        ['NA', 'NB', 'NC', 'ND', 'NE', 'OA', 'OB'],        ['HV', 'HW', 'HX', 'HY', 'HZ', 'JV', 'JW'],        ['HQ', 'HR', 'HS', 'HT', 'HU', 'JQ', 'JR'],        ['HL', 'HM', 'HN', 'HO', 'HP', 'JL', 'JM']], dtype='<U2')

100km BNG square letter prefixes.

Each element is a two-letter string itentifying a 100km grid square. The positional indices correspond to the 10km grid square location in the BNG index system and are used to determine the specific grid square for a given set of easting and northing coordinates.

Type:

npt.NDArray[np.str_] of shape (13, 7)