EPSG systems

EPSG:26930 NAD83 / Alabama West

Projected system (Transverse Mercator) in use: USA - Alabama - SPCS - W. The full definition below, and conversion in one click.

System record
CodeEPSG:26930
NameNAD83 / Alabama West
TypeProjected system — Transverse Mercator
Area of use USA - Alabama - SPCS - W
United States (USA) - Alabama west of approximately 86°37'W - counties Autauga; Baldwin; Bibb; Blount; Butler; Chilton; Choctaw; Clarke; Colbert; Conecuh; Cullman; Dallas; Escambia; Fayette; Franklin; Greene; Hale; Jefferson; Lamar; Lauderdale; Lawrence; Limestone; Lowndes; Marengo; Marion; Mobile; Monroe; Morgan; Perry; Pickens; Shelby; Sumter; Tuscaloosa; Walker; Washington; Wilcox; Winston.
Bounds W -88,48° · S 30,14° · E -86,30° · N 35,02°
Countries United States
DatumNorth American Datum 1983
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:4269 — NAD83
Unit metre (X east, Y north)
Transformation to WGS 84 NAD83 to WGS 84 (1) (EPSG:1188) — accuracy 4 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin30degree
Longitude of natural origin-87.5degree
Scale factor at natural origin0.999933333unity
False easting600000metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0 +a=6378137 +rf=298.257222101 +units=m +towgs84=0,0,0 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:26930.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_StatePlane_Alabama_West_FIPS_0102",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",600000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-87.5],PARAMETER["Scale_Factor",0.999933333],PARAMETER["Latitude_Of_Origin",30.0],UNIT["Meter",1.0]]

All systems — United States

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.