EPSG systems

EPSG:6105 NAD83(CSRS) / EPSG Arctic zone 4-16

Projected system (Lambert Conic Conformal (2SP)) in use: Arctic - 77°50'N to 72°50'N, 116°W to 91°W. The full definition below, and conversion in one click.

System record
CodeEPSG:6105
NameNAD83(CSRS) / EPSG Arctic zone 4-16
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use Arctic - 77°50'N to 72°50'N, 116°W to 91°W
Arctic - between 77°50'N and 72°50'N, approximately 116°W to approximately 91°W. May be extended westwards or eastwards within the latitude limits.
Bounds W -116,00° · S 72,83° · E -91,00° · N 77,84°
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 origin75.36440330555556degree
Longitude of false origin-104degree
Latitude of 1st standard parallel77degree
Latitude of 2nd standard parallel73.66666666666667degree
Easting at false origin16500000metre
Northing at false origin4500000metre

proj4 definition

+proj=lcc +lat_0=75.3644033055556 +lon_0=-104 +lat_1=77 +lat_2=73.6666666666667 +x_0=16500000 +y_0=4500000 +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:6105.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_CSRS_EPSG_Arctic_zone_4-16",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",16500000.0],PARAMETER["False_Northing",4500000.0],PARAMETER["Central_Meridian",-104.0],PARAMETER["Standard_Parallel_1",77.0],PARAMETER["Standard_Parallel_2",73.6666666666667],PARAMETER["Latitude_Of_Origin",75.3644033055556],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.