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Name: NAD83 to NAD83(CSRS)v4 (9)
Method: NTv2
Grid Files: BC_93_05.GSB
Remarks: Derived through NAD83(CSRS)v4.
Information source: GeoBC, Government of British Columbia, via ISO Geodetic Register.
Revision date: 2026-02-10
Unit: metre
Geodetic CRS: NAD83
Datum: North American Datum 1983
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Great Lakes Fisheries Commission
Revision date: 2007-01-19
Scope: Basin-wide mapping and analysis.
Area of use: Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.
&stroke=red&width=2&path=48.99,-138.07|60.01,-138.07|60.01,-114.33|48.99,-114.33|48.99,-138.07)
Center coordinates
-1685254.87 2725784.28
Projected bounds:
-2708178.22 1815142.62
-762743.7 3634747.0
WGS84 bounds:
-138.07 48.99
-114.33 60.01
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["NAD83 / Great Lakes and St Lawrence Albers", BASEGEOGCRS["NAD83", DATUM["North American Datum 1983", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4269]], CONVERSION["Great Lakes and St Lawrence Albers", METHOD["Albers Equal Area", ID["EPSG",9822]], PARAMETER["Latitude of false origin",45.568977, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8821]], PARAMETER["Longitude of false origin",-83.248627, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8822]], PARAMETER["Latitude of 1st standard parallel",42.122774, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8823]], PARAMETER["Latitude of 2nd standard parallel",49.01518, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8824]], PARAMETER["Easting at false origin",1000000, LENGTHUNIT["metre",1], ID["EPSG",8826]], PARAMETER["Northing at false origin",1000000, LENGTHUNIT["metre",1], ID["EPSG",8827]]], CS[Cartesian,2], AXIS["easting (X)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["northing (Y)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Basin-wide mapping and analysis."], AREA["Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway."], BBOX[40.99,-93.17,52.22,-54.75]], ID["EPSG",3175]]], TARGETCRS[ GEOGCRS["NAD83(CSRS)v4", DATUM["North American Datum of 1983 (CSRS) version 4", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2002]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Horizontal component of 3D system."], AREA["Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon."], BBOX[38.21,-141.01,86.46,-40.73]], ID["EPSG",8246], REMARK["Adopted by the Canadian federal government from 2002-01-01 and by the provincial governments of Alberta and British Columbia. Replaces NAD83(CSRS)v3. Replaced by NAD83(CSRS)v5 (CRS code 8249). Longitudes are POSITIVE EAST."]]], ABRIDGEDTRANSFORMATION["NAD83 to NAD83(CSRS)v4 (9)", METHOD["NTv2", ID["EPSG",9615]], PARAMETERFILE["Latitude and longitude difference file","BC_93_05.GSB"], USAGE[ SCOPE["Geodesy."], AREA["Canada - British Columbia - mainland between 138°05'W and 114°20'W and Graham Island."], BBOX[48.99,-138.07,60.01,-114.33]], ID["EPSG",9119], REMARK["Derived through NAD83(CSRS)v4."]]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "NAD83 / Great Lakes and St Lawrence Albers", "base_crs": { "type": "GeographicCRS", "name": "NAD83", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum 1983", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4269 }, "remarks": "Longitude is POSITIVE EAST. The adjustment included connections to Greenland and Mexico but the system was not adopted there. For applications with an accuracy of better than 1m replaced by NAD83(HARN) in the US and PRVI and by NAD83(CSRS) in Canada." }, "conversion": { "name": "Great Lakes and St Lawrence Albers", "method": { "name": "Albers Equal Area", "id": { "authority": "EPSG", "code": 9822 } }, "parameters": [ { "name": "Latitude of false origin", "value": 45.568977, "unit": "degree", "id": { "authority": "EPSG", "code": 8821 } }, { "name": "Longitude of false origin", "value": -83.248627, "unit": "degree", "id": { "authority": "EPSG", "code": 8822 } }, { "name": "Latitude of 1st standard parallel", "value": 42.122774, "unit": "degree", "id": { "authority": "EPSG", "code": 8823 } }, { "name": "Latitude of 2nd standard parallel", "value": 49.01518, "unit": "degree", "id": { "authority": "EPSG", "code": 8824 } }, { "name": "Easting at false origin", "value": 1000000, "unit": "metre", "id": { "authority": "EPSG", "code": 8826 } }, { "name": "Northing at false origin", "value": 1000000, "unit": "metre", "id": { "authority": "EPSG", "code": 8827 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "X", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "Y", "direction": "north", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 3175 } }, "target_crs": { "type": "GeographicCRS", "name": "NAD83(CSRS)v4", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum of 1983 (CSRS) version 4", "anchor_epoch": 2002, "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 8246 }, "remarks": "Adopted by the Canadian federal government from 2002-01-01 and by the provincial governments of Alberta and British Columbia. Replaces NAD83(CSRS)v3. Replaced by NAD83(CSRS)v5 (CRS code 8249). Longitudes are POSITIVE EAST." }, "transformation": { "name": "NAD83 to NAD83(CSRS)v4 (9)", "method": { "name": "NTv2", "id": { "authority": "EPSG", "code": 9615 } }, "parameters": [ { "name": "Latitude and longitude difference file", "value": "BC_93_05.GSB", "id": { "authority": "EPSG", "code": 8656 } } ], "id": { "authority": "EPSG", "code": 9119 } } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=aea +lat_0=45.568977 +lon_0=-83.248627 +lat_1=42.122774 +lat_2=49.01518 +x_0=1000000 +y_0=1000000 +datum=NAD83 +units=m +no_defs +type=crs"> <Layer srs="+proj=aea +lat_0=45.568977 +lon_0=-83.248627 +lat_1=42.122774 +lat_2=49.01518 +x_0=1000000 +y_0=1000000 +datum=NAD83 +units=m +no_defs +type=crs"> </Layer> </Map>
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