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