EPSG systems

EPSG:6416 NAD83(2011) / California zone 1 (ftUS)

Projected system (Lambert Conic Conformal (2SP)) in use: USA - California - SPCS - 1. The full definition below, and conversion in one click.

System record
CodeEPSG:6416
NameNAD83(2011) / California zone 1 (ftUS)
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use USA - California - SPCS - 1
United States (USA) - California - counties Del Norte; Humboldt; Lassen; Modoc; Plumas; Shasta; Siskiyou; Tehama; Trinity.
Bounds W -124,45° · S 39,59° · E -119,99° · N 42,01°
Countries United States
DatumNAD83 (National Spatial Reference System 2011)
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:6318 — NAD83(2011)
Unit US survey foot (X east, Y north)
Transformation to WGS 84 NAD83(2011) to WGS 84 (1) (EPSG:9774) — accuracy 2 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of false origin39.333333333333336degree
Longitude of false origin-122degree
Latitude of 1st standard parallel41.666666666666664degree
Latitude of 2nd standard parallel40degree
Easting at false origin6561666.667US survey foot
Northing at false origin1640416.667US survey foot

proj4 definition

+proj=lcc +lat_0=39.3333333333333 +lon_0=-122 +lat_1=41.6666666666667 +lat_2=40 +x_0=2000000.0001016 +y_0=500000.0001016 +ellps=GRS80 +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:6416.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_2011_StatePlane_California_I_FIPS_0401_Ft_US",GEOGCS["GCS_NAD_1983_2011",DATUM["D_NAD_1983_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",6561666.667],PARAMETER["False_Northing",1640416.667],PARAMETER["Central_Meridian",-122.0],PARAMETER["Standard_Parallel_1",41.6666666666667],PARAMETER["Standard_Parallel_2",40.0],PARAMETER["Latitude_Of_Origin",39.3333333333333],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.