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The State Plane Coordinate System

The State Plane Coordinate System (SPS or SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. There are 110 zones in the continental US, with 10 more in Alaska, 5 in Hawaii, and one for Puerto Rico and US Virgin Islands. The system is widely used for geographic data by state and local governments. Its popularity is due to at least two factors. First, it uses a simple Cartesian coordinate system to specify locations rather than a more complex spherical coordinate system (the geographic coordinate system of latitude and longitude). By thus ignoring the curvature of the Earth, "plane surveying" methods can be used, speeding up and simplifying calculations. Second, the system is highly accurate within each zone (error less than 1:10,000). Outside a specific state plane zone accuracy rapidly declines, thus the system is not useful for regional or national mapping.

Most state plane zones are based on either a Transverse Mercator projection or a Lambert conformal conic projection. The choice between the two map projections is based on the shape of the state and its zones. States that are long in the east-west direction are typically divided into zones that are also long east-west. These zones use the Lambert conformal conic projection, because it is good at maintaining accuracy along an east-west axis. Zones that are long in the north-south direction use the Transverse Mercator projection because it is better at maintaining accuracy along a north-south axis. The panhandle of Alaska, whose maximum dimension is on a diagonal, uses an Oblique Mercator projection, which minimizes the combined error in the X and Y directions.


All State Plane zones in Florida

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County or City SPCS27 Code SPCS83 Code
Alachua 10903 903
Baker 10903 903
Bay 10903 903
Bradford 10903 903
Brevard 10901 901
Broward 10901 901
Calhoun 10903 903
Charlotte 10902 902
Citrus 10902 902
Clay 10901 901
Collier 10901 901
Columbia 10903 903
DeSoto 10902 902
Dixie 10903 903
Duval 10901 901
Escambia 10903 903
Flagler 10901 901
Franklin 10903 903
Gadsden 10903 903
Gilchrist 10903 903
Glades 10901 901
Gulf 10903 903
Hamilton 10903 903
Hardee 10902 902
Hendry 10901 901
Hernando 10902 902
Highlands 10901 901
Hillsborough 10902 902
Holmes 10903 903
Indian River 10901 901
Jackson 10903 903
Jefferson 10903 903
Lafayette 10903 903
Lake 10901 901
Lee 10902 902
Leon 10903 903
Levy 10902 902
Liberty 10903 903
Madison 10903 903
Manatee 10902 902
Marion 10902 902
Martin 10901 901
Miami-Dade 10901 901
Monroe 10901 901
Nassau 10901 901
Okaloosa 10903 903
Okeechobee 10901 901
Orange 10901 901
Osceola 10901 901
Palm Beach 10901 901
Pasco 10902 902
Pinellas 10902 902
Polk 10902 902
Putnam 10901 901
St. Johns 10901 901
St. Lucie 10901 901
Santa Rosa 10903 903
Sarasota 10902 902
Seminole 10901 901
Sumter 10902 902
Suwannee 10903 903
Taylor 10903 903
Union 10903 903
Volusia 10901 901
Wakulla 10903 903
Walton 10903 903
Washington 10903 903

Click here to go back to the list off all State Plane grids