EPSG systems

EPSG:3468 NAD83(NSRS2007) / Alaska zone 1

Projected system (Hotine Oblique Mercator (variant A)) in use: USA - Alaska - Panhandle. The full definition below, and conversion in one click.

System record
CodeEPSG:3468
NameNAD83(NSRS2007) / Alaska zone 1
TypeProjected system — Hotine Oblique Mercator (variant A)
Area of use USA - Alaska - Panhandle
United States (USA) - Alaska - east of 141°W; i.e. Panhandle.
Bounds W -141,00° · S 54,61° · E -129,99° · N 60,35°
Countries United States
DatumNAD83 (National Spatial Reference System 2007)
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:4759 — NAD83(NSRS2007)
Unit metre (X east, Y north)
Transformation to WGS 84 NAD83(NSRS2007) to WGS 84 (1) (EPSG:15931) — accuracy 2 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of projection centre57degree
Longitude of projection centre-133.66666666666666degree
Azimuth at projection centre323.13010236111114degree
Angle from Rectified to Skew Grid323.13010236111114degree
Scale factor at projection centre0.9999unity
False easting5000000metre
False northing-5000000metre

proj4 definition

+proj=omerc +no_uoff +lat_0=57 +lonc=-133.666666666667 +alpha=323.130102361111 +gamma=323.130102361111 +k=0.9999 +x_0=5000000 +y_0=-5000000 +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:3468.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_NSRS2007_StatePlane_Alaska_1_FIPS_5001",GEOGCS["GCS_NAD_1983_NSRS2007",DATUM["D_NAD_1983_NSRS2007",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Hotine_Oblique_Mercator_Azimuth_Natural_Origin"],PARAMETER["False_Easting",5000000.0],PARAMETER["False_Northing",-5000000.0],PARAMETER["Scale_Factor",0.9999],PARAMETER["Azimuth",-36.8698976388889],PARAMETER["Longitude_Of_Center",-133.666666666667],PARAMETER["Latitude_Of_Center",57.0],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.