State Plane System

A State Plane system is a coordinate system used in the US. Each US state is divided into one or more zones, known as State Plane zones. Supported State Plane systems include:

Additionally, an HPGN (High Precision Geodetic Network, now known as HARN - High Accuracy Precision Network) zone can be specified for each state plane zone.

The boundary of most of the state plane zones remained the same from 1927 to 1983. The US State Plane Zones are shown in the map below. The boundaries are shown for each state plane zone by clicking on a region on the map. The boundaries that changed between 1927 and 1983 are highlighted for each state plane zone that changed.

 

 

 

 

 

Legend of Zoomed Views

Red outlined states
NAD 27 and most NAD 83 State Plane Zones.

Yellow outlined states
States with State Plane Zone boundaries that changed from NAD 27 to NAD 83 are outlined in yellow.

Dotted gray lines
County boundaries.

 

The following zones are not shown on the map:

 

Zone Name

Zone ID

NAD 27

Puerto Rico / Virgin Islands
St. Croix
American Samoa
Guam Island

5201
5202
5300
5400

NAD 83

Puerto Rico / Virgin Islands
American Samoa
Guam Island

5200
5300
5400