EPSG systems

EPSG:3433 NAD83 / Arkansas North (ftUS)

Projected system (Lambert Conic Conformal (2SP)) in use: USA - Arkansas - SPCS - N. The full definition below, and conversion in one click.

System record
CodeEPSG:3433
NameNAD83 / Arkansas North (ftUS)
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use USA - Arkansas - SPCS - N
United States (USA) - Arkansas - counties of Baxter; Benton; Boone; Carroll; Clay; Cleburne; Conway; Craighead; Crawford; Crittenden; Cross; Faulkner; Franklin; Fulton; Greene; Independence; Izard; Jackson; Johnson; Lawrence; Logan; Madison; Marion; Mississippi; Newton; Perry; Poinsett; Pope; Randolph; Scott; Searcy; Sebastian; Sharp; St Francis; Stone; Van Buren; Washington; White; Woodruff; Yell.
Bounds W -94,62° · S 34,67° · E -89,64° · N 36,50°
Countries United States
DatumNorth American Datum 1983
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:4269 — NAD83
Unit US survey foot (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 false origin34.333333333333336degree
Longitude of false origin-92degree
Latitude of 1st standard parallel36.233333333333334degree
Latitude of 2nd standard parallel34.93333333333333degree
Easting at false origin1312333.3333US survey foot
Northing at false origin0US survey foot

proj4 definition

+proj=lcc +lat_0=34.3333333333333 +lon_0=-92 +lat_1=36.2333333333333 +lat_2=34.9333333333333 +x_0=399999.99998984 +y_0=0 +a=6378137 +rf=298.257222101 +units=us-ft +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:3433.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_StatePlane_Arkansas_North_FIPS_0301_Feet",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["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1312333.3333],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-92.0],PARAMETER["Standard_Parallel_1",36.2333333333333],PARAMETER["Standard_Parallel_2",34.9333333333333],PARAMETER["Latitude_Of_Origin",34.3333333333333],UNIT["US survey foot",0.304800609601219]]

All systems — United States

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