Northwest State Plane

NAD 27 / 83
Zone Name	Map Code	Zone ID
Idaho East Idaho Central Idaho West Montana North Montana Central Montana South Oregon North Oregon South Washington North Washington South Wyoming I Wyoming II Wyoming III Wyoming IV	ID_E ID_C ID_W MT_N MT_C MT_S OR_N OR_S WA_N WA_S WY_E WY_EC WY_WC WY_W	1101 1102 1103 2501 2502 2503 3601 3602 4601 4602 4901 4902 4903 4904
NAD 83 Zone Changes
Montana	MT	2500
NAD 83 Name Changes
Wyoming East Wyoming East Central Wyoming West Central Wyoming West	WY_E WY_EC WY_WC WY_W	4901 4902 4903 4904
NAD 83 Boundary Changes
Washington North Washington South	WA_N WA_S	4601 4602