EPSG:3581 — NAD83(CSRS) / NWT Lambert

Projected · Canada - NWT

Export Formats

OGC WKT

PROJCS[
    "NAD83(CSRS) / NWT Lambert",
    GEOGCS[
        "NAD83(CSRS)",
        DATUM[
            "NAD83_Canadian_Spatial_Reference_System",
            SPHEROID["GRS 1980",6378137,298.257222101],
            TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4617"]
    ],
    PROJECTION["Lambert_Conformal_Conic_2SP"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-112],
    PARAMETER["standard_parallel_1",62],
    PARAMETER["standard_parallel_2",70],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","3581"]
]

WKT2

PROJCRS[
    "NAD83(CSRS) / NWT Lambert",
    BASEGEOGCRS[
        "NAD83(CSRS)",
        DATUM[
            "NAD83 Canadian Spatial Reference System",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ID["EPSG",6140]
        ],
        ID["EPSG",4617]
    ],
    CONVERSION[
        "Northwest Territories Lambert",
        METHOD["Lambert Conic Conformal (2SP)",ID["EPSG",9802]],
        PARAMETER[
            "Latitude of false origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8821]
        ],
        PARAMETER[
            "Longitude of false origin",
            -112,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8822]
        ],
        PARAMETER[
            "Latitude of 1st standard parallel",
            62,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8823]
        ],
        PARAMETER[
            "Latitude of 2nd standard parallel",
            70,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8824]
        ],
        PARAMETER[
            "Easting at false origin",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8826]
        ],
        PARAMETER[
            "Northing at false origin",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8827]
        ],
        ID["EPSG",19857]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3581]
]

PROJ.4

+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:3581", "+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3581,
  "name": "NAD83(CSRS) / NWT Lambert",
  "kind": "projected",
  "area": "Canada - NWT",
  "unit": "metre",
  "bbox": [
    59.98,
    -136.46,
    78.81,
    -102
  ],
  "proj4": "+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3581, 'EPSG', 3581, '+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs', 'PROJCS["NAD83(CSRS) / NWT Lambert",GEOGCS["NAD83(CSRS)",DATUM["NAD83_Canadian_Spatial_Reference_System",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4617"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-112],PARAMETER["standard_parallel_1",62],PARAMETER["standard_parallel_2",70],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3581"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=lcc"
  "+lat_0=0"
  "+lon_0=-112"
  "+lat_1=62"
  "+lat_2=70"
  "+x_0=0"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

3581=PROJCS["NAD83(CSRS) / NWT Lambert",GEOGCS["NAD83(CSRS)",DATUM["NAD83_Canadian_Spatial_Reference_System",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4617"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-112],PARAMETER["standard_parallel_1",62],PARAMETER["standard_parallel_2",70],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3581"]]

Related Coordinate Systems

Available Transformations (14)

Transformations inherited from base CRS: EPSG:4617 (NAD83(CSRS))

Transformation	Source → Target	Accuracy (m)
NAD83(CSRS) to WGS 84 (2)	4617 → 4326	1
NAD83 to NAD83(CSRS) (4)	4269 → 4617	2
NAD83(CSRS) to WGS 84 (1)	4617 → 4326	2
ATS77 to NAD83(CSRS) (1) Deprecated	4122 → 4617	1.5
ATS77 to NAD83(CSRS) (2) Deprecated	4122 → 4617	1.5
ATS77 to NAD83(CSRS) (3) Deprecated	4122 → 4617	1.5
NAD27 to NAD83(CSRS) (1) Deprecated	4267 → 4617	1.5
NAD27 to NAD83(CSRS) (2) Deprecated	4267 → 4617	1.5
NAD27 to NAD83(CSRS) (4) Deprecated	4267 → 4617	0.8
NAD83 to NAD83(CSRS) (1) Deprecated	4269 → 4617	1.5

Other CRS using NAD83 Canadian Spatial Reference System (70)

Frequently Asked Questions

How do I add EPSG:3581 to GeoServer?

Add the following definition to your GeoServer configuration:

3581=PROJCS["NAD83(CSRS) / NWT Lambert",GEOGCS["NAD83(CSRS)",DATUM["NAD83_Canadian_Spatial_Reference_System",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4617"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-112],PARAMETER["standard_parallel_1",62],PARAMETER["standard_parallel_2",70],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3581"]]

Read the full GeoServer guide →

How do I add EPSG:3581 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3581, 'EPSG', 3581, '+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs', 'PROJCS["NAD83(CSRS) / NWT Lambert",GEOGCS["NAD83(CSRS)",DATUM["NAD83_Canadian_Spatial_Reference_System",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4617"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-112],PARAMETER["standard_parallel_1",62],PARAMETER["standard_parallel_2",70],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3581"]]');

Read the full PostGIS guide →

How do I add EPSG:3581 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=lcc"
  "+lat_0=0"
  "+lon_0=-112"
  "+lat_1=62"
  "+lat_2=70"
  "+x_0=0"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:3581 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:3581", "+proj=lcc +lat_0=0 +lon_0=-112 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →

Type

Projected

Unit

metre

Geodetic CRS

NAD83(CSRS)

Datum

NAD83 Canadian Spatial Reference System

Ellipsoid

GRS 1980

Prime Meridian

Greenwich

Area of Use

Canada - NWT

Canada - Northwest Territories onshore.

Coordinate System

Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Center Coordinates

-283241.65 9184578.43

Projected Bounds

10247934.24 -1335120.91222227.52 8383622.03

WGS84 Bounds

78.81 -136.46-102.00 59.98

Data Source

EPSG

Information Source

Government of Northwest Territories Centre for Geomatics. http://maps.gnwtgeomatics.nt.ca

Revision Date

2007-05-29

Scope

Territory-wide spatial data management.

Remarks

This CRS may sometimes be called "NAD83 / NWT Lambert". That is the name of a different system (see CRS code 3580) but at the scales involved the positional difference of under 2 metres may not be significant.

EPSG

3581