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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 Texas

County or City SPCS27 Code SPCS83 Code
Anderson 14203 4203
Andrews 14202 4202
Angelina 14203 4203
Aransas 14204 4204
Archer 14202 4202
Armstrong 14201 4201
Atascosa 14204 4204
Austin 14204 4204
Bailey 14202 4202
Bandera 14204 4204
Bastrop 14203 4203
Baylor 14202 4202
Bee 14204 4204
Bell 14203 4203
Bexar 14204 4204
Blanco 14203 4203
Borden 14202 4202
Bosque 14203 4203
Bowie 14202 4202
Brazoria 14204 4204
Brazos 14203 4203
Brewster 14204 4204
Briscoe 14201 4201
Brooks 14205 4205
Brown 14203 4203
Burleson 14203 4203
Burnet 14203 4203
Caldwell 14204 4204
Calhoun 14204 4204
Callahan 14202 4202
Cameron 14205 4205
Camp 14202 4202
Carson 14201 4201
Cass 14202 4202
Castro 14201 4201
Chambers 14204 4204
Cherokee 14203 4203
Childress 14201 4201
Clay 14202 4202
Cochran 14202 4202
Coke 14203 4203
Coleman 14203 4203
Collin 14202 4202
Collingsworth 14201 4201
Colorado 14204 4204
Comal 14204 4204
Comanche 14203 4203
Concho 14203 4203
Cooke 14202 4202
Coryell 14203 4203
Cottle 14202 4202
Crane 14203 4203
Crockett 14203 4203
Crosby 14202 4202
Culberson 14203 4203
Dallam 14201 4201
Dallas 14202 4202
Dawson 14202 4202
Deaf Smith 14201 4201
Delta 14202 4202
Denton 14202 4202
DeWitt 14204 4204
Dickens 14202 4202
Dimmit 14204 4204
Donley 14201 4201
Duval 14205 4205
Eastland 14202 4202
Ector 14203 4203
Edwards 14204 4204
Ellis 14202 4202
El Paso 14203 4203
Erath 14202 4202
Falls 14203 4203
Fannin 14202 4202
Fayette 14204 4204
Fisher 14202 4202
Floyd 14202 4202
Foard 14202 4202
Fort Bend 14204 4204
Franklin 14202 4202
Freestone 14203 4203
Frio 14204 4204
Gaines 14202 4202
Galveston 14204 4204
Garza 14202 4202
Gillespie 14203 4203
Glasscock 14203 4203
Goliad 14204 4204
Gonzales 14204 4204
Gray 14201 4201
Grayson 14202 4202
Gregg 14202 4202
Grimes 14203 4203
Guadalupe 14204 4204
Hale 14202 4202
Hall 14201 4201
Hamilton 14203 4203
Hansford 14201 4201
Hardeman 14202 4202
Hardin 14203 4203
Harris 14204 4204
Harrison 14202 4202
Hartley 14201 4201
Haskell 14202 4202
Hays 14204 4204
Hemphill 14201 4201
Henderson 14202 4202
Hidalgo 14205 4205
Hill 14202 4202
Hockley 14202 4202
Hood 14202 4202
Hopkins 14202 4202
Houston 14203 4203
Howard 14202 4202
Hudspeth 14203 4203
Hunt 14202 4202
Hutchinson 14201 4201
Irion 14203 4203
Jack 14202 4202
Jackson 14204 4204
Jasper 14203 4203
Jeff Davis 14203 4203
Jefferson 14204 4204
Jim Hogg 14205 4205
Jim Wells 14205 4205
Johnson 14202 4202
Jones 14202 4202
Karnes 14204 4204
Kaufman 14202 4202
Kendall 14204 4204
Kenedy 14205 4205
Kent 14202 4202
Kerr 14204 4204
Kimble 14203 4203
King 14202 4202
Kinney 14204 4204
Kleberg 14205 4205
Knox 14202 4202
Lamar 14202 4202
Lamb 14202 4202
Lampasas 14203 4203
La Salle 14204 4204
Lavaca 14204 4204
Lee 14203 4203
Leon 14203 4203
Liberty 14203 4203
Limestone 14203 4203
Lipscomb 14201 4201
Live Oak 14204 4204
Llano 14203 4203
Loving 14203 4203
Lubbock 14202 4202
Lynn 14202 4202
McCulloch 14203 4203
McLennan 14203 4203
McMullen 14204 4204
Madison 14203 4203
Marion 14202 4202
Martin 14202 4202
Mason 14203 4203
Matagorda 14204 4204
Maverick 14204 4204
Medina 14204 4204
Menard 14203 4203
Midland 14203 4203
Milam 14203 4203
Mills 14203 4203
Mitchell 14202 4202
Montague 14202 4202
Montgomery 14203 4203
Moore 14201 4201
Morris 14202 4202
Motley 14202 4202
Nacogdoches 14203 4203
Navarro 14202 4202
Newton 14203 4203
Nolan 14202 4202
Nueces 14205 4205
Ochiltree 14201 4201
Oldham 14201 4201
Orange 14203 4203
Palo Pinto 14202 4202
Panola 14202 4202
Parker 14202 4202
Parmer 14201 4201
Pecos 14203 4203
Polk 14203 4203
Potter 14201 4201
Presidio 14204 4204
Rains 14202 4202
Randall 14201 4201
Reagan 14203 4203
Real 14204 4204
Red River 14202 4202
Reeves 14203 4203
Refugio 14204 4204
Roberts 14201 4201
Robertson 14203 4203
Rockwall 14202 4202
Runnels 14203 4203
Rusk 14202 4202
Sabine 14203 4203
San Augustine 14203 4203
San Jacinto 14203 4203
San Patricio 14205 4205
San Saba 14203 4203
Schleicher 14203 4203
Scurry 14202 4202
Shackelford 14202 4202
Shelby 14203 4203
Sherman 14201 4201
Smith 14202 4202
Somervell 14202 4202
Starr 14205 4205
Stephens 14202 4202
Sterling 14203 4203
Stonewall 14202 4202
Sutton 14203 4203
Swisher 14201 4201
Tarrant 14202 4202
Taylor 14202 4202
Terrell 14204 4204
Terry 14202 4202
Throckmorton 14202 4202
Titus 14202 4202
Tom Green 14203 4203
Travis 14203 4203
Trinity 14203 4203
Tyler 14203 4203
Upshur 14202 4202
Upton 14203 4203
Uvalde 14204 4204
Val Verde 14204 4204
Van Zandt 14202 4202
Victoria 14204 4204
Walker 14203 4203
Waller 14204 4204
Ward 14203 4203
Washington 14203 4203
Webb 14205 4205
Wharton 14204 4204
Wheeler 14201 4201
Wichita 14202 4202
Wilbarger 14202 4202
Willacy 14205 4205
Williamson 14203 4203
Wilson 14204 4204
Winkler 14203 4203
Wise 14202 4202
Wood 14202 4202
Yoakum 14202 4202
Young 14202 4202
Zapata 14205 4205
Zavala 14204 4204

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