EPSG systems

EPSG:6112 NAD83(CSRS) / EPSG Arctic zone 6-20

Projected system (Lambert Conic Conformal (2SP)) in use: Arctic - 71°10'N to 66°10'N, 122°W to 103°W. The full definition below, and conversion in one click.

System record
CodeEPSG:6112
NameNAD83(CSRS) / EPSG Arctic zone 6-20
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use Arctic - 71°10'N to 66°10'N, 122°W to 103°W
Arctic - between 71°10'N and 66°10'N, approximately 122°W to approximately 103°W. May be extended westwards or eastwards within the latitude limits.
Bounds W -122,00° · S 66,16° · E -103,00° · N 71,17°
Countries World
DatumNAD83 Canadian Spatial Reference System
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:4617 — NAD83(CSRS)
Unit metre (E east, N north)
Transformation to WGS 84 NAD83(CSRS) to WGS 84 (2) (EPSG:1946) — accuracy 1 m
ScopeExploration and development, mapping.

Projection parameters

ParameterValueUnit
Latitude of false origin68.68747555555557degree
Longitude of false origin-113degree
Latitude of 1st standard parallel70.33333333333333degree
Latitude of 2nd standard parallel67degree
Easting at false origin20500000metre
Northing at false origin6500000metre

proj4 definition

+proj=lcc +lat_0=68.6874755555556 +lon_0=-113 +lat_1=70.3333333333333 +lat_2=67 +x_0=20500000 +y_0=6500000 +ellps=GRS80 +units=m +towgs84=-0.991,1.9072,0.5129,0.02579,0.00965,0.01166,0 +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:6112.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_CSRS_EPSG_Arctic_zone_6-20",GEOGCS["GCS_North_American_1983_CSRS",DATUM["D_North_American_1983_CSRS",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",20500000.0],PARAMETER["False_Northing",6500000.0],PARAMETER["Central_Meridian",-113.0],PARAMETER["Standard_Parallel_1",70.3333333333333],PARAMETER["Standard_Parallel_2",67.0],PARAMETER["Latitude_Of_Origin",68.6874755555556],UNIT["Meter",1.0]]

All systems — World

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