EPSG systems

EPSG:6393 NAD83(2011) / Alaska Albers

Projected system (Albers Equal Area) in use: USA - Alaska. The full definition below, and conversion in one click.

System record
CodeEPSG:6393
NameNAD83(2011) / Alaska Albers
TypeProjected system — Albers Equal Area
Area of use USA - Alaska
United States (USA) - Alaska.
Bounds W 172,42° · S 51,30° · E -129,99° · N 71,40°
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 metre (X east, Y north)
Transformation to WGS 84 NAD83(2011) to WGS 84 (1) (EPSG:9774) — accuracy 2 m
ScopeTopographic mapping (small scale).

Projection parameters

ParameterValueUnit
Latitude of false origin50degree
Longitude of false origin-154degree
Latitude of 1st standard parallel55degree
Latitude of 2nd standard parallel65degree
Easting at false origin0metre
Northing at false origin0metre

proj4 definition

+proj=aea +lat_0=50 +lon_0=-154 +lat_1=55 +lat_2=65 +x_0=0 +y_0=0 +ellps=GRS80 +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:6393.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_2011_Alaska_Albers",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["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-154.0],PARAMETER["Standard_Parallel_1",55.0],PARAMETER["Standard_Parallel_2",65.0],PARAMETER["Latitude_Of_Origin",50.0],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.