Geofacet grid for Nigeria’s 37 Federal States (below):

row,col,code,name
1,4,NG.KT,Katsina
1,5, NG.KN, Kano
1,2,NG.SO,Sokoto
1,3, NG.ZA, Zamfara
1,6, NG.JI, Jigawa
1,7, NG.YO, Yobe
2,2, NG.KE, Kebbi
2,3, NG.NI, Niger
2,4, NG.KD, Kaduna
2,7, NG.BO, Borno
2,6, NG.GO, Gombe
2,5, NG.BA, Bauchi
3,1, NG.OY, Oyo
3,2, NG.KW, Kwara
3,3,NG.FC, Abuja FCT
3,4, NG.NA, Nassarawa
3,6, NG.AD, Adamawa
3,5, NG.PL, Plateau
4,3, NG.EK, Ekiti
4,1, NG.OG, Ogun
4,2, NG.OS, Osun
4,4, NG.KO, Kogi
4,6, NG.TA, Taraba
4,5, NG.BE, Benue
5,3,NG.ED, Edo
5,1, NG.LA, Lagos
5,2, NG.ON, Ondo
5,6,NG.EB, Ebonyi
5,4, NG.AN, Anambra
5,5, NG.EN, Enugu
6,2, NG.DE, Delta
6,3, NG.IM, Imo
6,4,NG.AB, Abia
6,5, NG.CR, Cross River
7,3, NG.BY, Bayelsa
7,4, NG.RI, Rivers
7,5, NG.AK, Akwa Ibom