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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 Missouri

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

County or City SPCS27 Code SPCS83 Code
Adair 12402 2402
Andrew 12403 2403
Atchison 12403 2403
Audrain 12402 2402
Barry 12403 2403
Barton 12403 2403
Bates 12403 2403
Benton 12402 2402
Bollinger 12401 2401
Boone 12402 2402
Buchanan 12403 2403
Butler 12401 2401
Caldwell 12403 2403
Callaway 12402 2402
Camden 12402 2402
Cape Girardeau 12401 2401
Carroll 12402 2402
Carter 12401 2401
Cass 12403 2403
Cedar 12403 2403
Chariton 12402 2402
Christian 12402 2402
Clark 12401 2401
Clay 12403 2403
Clinton 12403 2403
Cole 12402 2402
Cooper 12402 2402
Crawford 12401 2401
Dade 12403 2403
Dallas 12402 2402
Daviess 12403 2403
DeKalb 12403 2403
Dent 12401 2401
Douglas 12402 2402
Dunklin 12401 2401
Franklin 12401 2401
Gasconade 12401 2401
Gentry 12403 2403
Greene 12402 2402
Grundy 12402 2402
Harrison 12403 2403
Henry 12403 2403
Hickory 12402 2402
Holt 12403 2403
Howard 12402 2402
Howell 12402 2402
Iron 12401 2401
Jackson 12403 2403
Jasper 12403 2403
Jefferson 12401 2401
Johnson 12403 2403
Knox 12402 2402
Laclede 12402 2402
Lafayette 12403 2403
Lawrence 12403 2403
Lewis 12401 2401
Lincoln 12401 2401
Linn 12402 2402
Livingston 12402 2402
McDonald 12403 2403
Macon 12402 2402
Madison 12401 2401
Maries 12402 2402
Marion 12401 2401
Mercer 12402 2402
Miller 12402 2402
Mississippi 12401 2401
Moniteau 12402 2402
Monroe 12402 2402
Montgomery 12401 2401
Morgan 12402 2402
New Madrid 12401 2401
Newton 12403 2403
Nodaway 12403 2403
Oregon 12401 2401
Osage 12402 2402
Ozark 12402 2402
Pemiscot 12401 2401
Perry 12401 2401
Pettis 12402 2402
Phelps 12402 2402
Pike 12401 2401
Platte 12403 2403
Polk 12402 2402
Pulaski 12402 2402
Putnam 12402 2402
Ralls 12401 2401
Randolph 12402 2402
Ray 12403 2403
Reynolds 12401 2401
Ripley 12401 2401
St. Charles 12401 2401
St. Clair 12403 2403
Ste. Genevieve 12401 2401
St. Francois 12401 2401
St. Louis 12401 2401
Saline 12402 2402
Schuyler 12402 2402
Scotland 12402 2402
Scott 12401 2401
Shannon 12401 2401
Shelby 12402 2402
Stoddard 12401 2401
Stone 12402 2402
Sullivan 12402 2402
Taney 12402 2402
Texas 12402 2402
Vernon 12403 2403
Warren 12401 2401
Washington 12401 2401
Wayne 12401 2401
Webster 12402 2402
Worth 12403 2403
Wright 12402 2402
St. Louis 12401 2401

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