MDA http://api.nsgreg.nga.mil/geo-political/GENC/3/3-19 urn:us:gov:dod:nga:def:geo-political:GENC:3:3-19 geo-political:GENC:3:3-19 ge:GENC:3:3-19 MD http://api.nsgreg.nga.mil/geo-political/GENC/2/3-19 urn:us:gov:dod:nga:def:geo-political:GENC:2:3-19 geo-political:GENC:2:3-19 ge:GENC:2:3-19 498 http://api.nsgreg.nga.mil/geo-political/GENC/n/3-19 urn:us:gov:dod:nga:def:geo-political:GENC:n:3-19 geo-political:GENC:n:3-19 ge:GENC:n:3-19 exception 2023-07-01 unchanged independent MD-AN MD-BA MD-BD MD-BR MD-BS MD-CA MD-CL MD-CM MD-CR MD-CS MD-CT MD-CU MD-DO MD-DR MD-DU MD-ED MD-FA MD-FL MD-GA MD-GL MD-HI MD-IA MD-LE MD-NI MD-OC MD-OR MD-RE MD-RI MD-SD MD-SI MD-SN MD-SO MD-ST MD-SV MD-TA MD-TE MD-UN ron