EPSG:3773

NAD27 / Alberta 3TM ref merid 117 W

Available transformations
to EPSG:4326

Selected transformation

Grid Files: conus.las conus.los nbhpgn.las nbhpgn.los

Remarks: Transformation steps are from NAD27 to NAD83(HARN) (16) (code 8475) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

Information source: OGP

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: NAD27

Datum: North American Datum 1927

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: Alberta SRD Lands Branch, Geodetic Fact Sheets 2, 6 and 10. http://www.srd.gov.ab.ca/lands

Revision date: 2008-06-23

Scope: Cadastre, survey control and engineering survey in urban areas, typically in all municipalities that previously comprised the 73 Municipal Integrated Surveying and Mapping (MISAM) areas, also known as urban cadastral map areas. For rural areas use UTM.

Remarks: If used for rural area control markers, area of use is amended to between 118°W and 116°W; however use of NAD27 / UTM zone 11N (CRS code 26711) is encouraged in these rural areas.

Area of use: Canada - Alberta - between 118°30'W and 115°30' W.

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

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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        BOUNDCRS[
            SOURCECRS[
                PROJCRS["NAD27 / Alberta 3TM ref merid 117 W",
                    BASEGEOGCRS["NAD27",
                        DATUM["North American Datum 1927",
                            ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                                LENGTHUNIT["metre",1]]],
                        PRIMEM["Greenwich",0,
                            ANGLEUNIT["degree",0.0174532925199433]],
                        ID["EPSG",4267]],
                    CONVERSION["Alberta 3-degree TM reference meridian 117 W",
                        METHOD["Transverse Mercator",
                            ID["EPSG",9807]],
                        PARAMETER["Latitude of natural origin",0,
                            ANGLEUNIT["degree",0.0174532925199433],
                            ID["EPSG",8801]],
                        PARAMETER["Longitude of natural origin",-117,
                            ANGLEUNIT["degree",0.0174532925199433],
                            ID["EPSG",8802]],
                        PARAMETER["Scale factor at natural origin",0.9999,
                            SCALEUNIT["unity",1],
                            ID["EPSG",8805]],
                        PARAMETER["False easting",0,
                            LENGTHUNIT["metre",1],
                            ID["EPSG",8806]],
                        PARAMETER["False northing",0,
                            LENGTHUNIT["metre",1],
                            ID["EPSG",8807]]],
                    CS[Cartesian,2],
                        AXIS["(E)",east,
                            ORDER[1],
                            LENGTHUNIT["metre",1]],
                        AXIS["(N)",north,
                            ORDER[2],
                            LENGTHUNIT["metre",1]],
                    ID["EPSG",3773]]],
            TARGETCRS[
                GEOGCRS["NAD83",
                    DATUM["North American Datum 1983",
                        ELLIPSOID["GRS 1980",6378137,298.257222101,
                            LENGTHUNIT["metre",1]]],
                    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]],
                    ID["EPSG",4269]]],
            ABRIDGEDTRANSFORMATION["NAD27 to NAD83 (1)",
                METHOD["NADCON",
                    ID["EPSG",9613]],
                PARAMETERFILE["Latitude difference file","conus.las"],
                PARAMETERFILE["Longitude difference file","conus.los"],
                ID["EPSG",1241]]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            ENSEMBLE["World Geodetic System 1984 ensemble",
                MEMBER["World Geodetic System 1984 (Transit)"],
                MEMBER["World Geodetic System 1984 (G730)"],
                MEMBER["World Geodetic System 1984 (G873)"],
                MEMBER["World Geodetic System 1984 (G1150)"],
                MEMBER["World Geodetic System 1984 (G1674)"],
                MEMBER["World Geodetic System 1984 (G1762)"],
                MEMBER["World Geodetic System 1984 (G2139)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            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["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["NAD83 to WGS 84 (28)",
        METHOD["NADCON",
            ID["EPSG",9613]],
        PARAMETERFILE["Latitude difference file","nbhpgn.las"],
        PARAMETERFILE["Longitude difference file","nbhpgn.los"],
        USAGE[
            SCOPE["(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences."],
            AREA["United States (USA) - Nebraska - counties of Adams; Antelope; Arthur; Banner; Blaine; Boone; Box Butte; Boyd; Brown; Buffalo; Burt; Butler; Cass; Cedar; Chase; Cherry; Cheyenne; Clay; Colfax; Cuming; Custer; Dakota; Dawes; Dawson; Deuel; Dixon; Dodge; Douglas; Dundy; Fillmore; Franklin; Frontier; Furnas; Gage; Garden; Garfield; Gosper; Grant; Greeley; Hall; Hamilton; Harlan; Hayes; Hitchcock; Holt; Hooker; Howard; Jefferson; Johnson; Kearney; Keith; Keya Paha; Kimball; Knox; Lancaster; Lincoln; Logan; Loup; Madison; McPherson; Merrick; Morrill; Nance; Nemaha; Nuckolls; Otoe; Pawnee; Perkins; Phelps; Pierce; Platte; Polk; Red Willow; Richardson; Rock; Saline; Sarpy; Saunders; Scotts Bluff; Seward; Sheridan; Sherman; Sioux; Stanton; Thayer; Thomas; Thurston; Valley; Washington; Wayne; Webster; Wheeler; York."],
            BBOX[39.99,-104.06,43.01,-95.3]],
        ID["EPSG",1724],
        REMARK["Parameter files are from NAD83 to NAD83(HARN) (16) (code 1489) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation."]]]

Definition: JSON

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    "type": "BoundCRS",
    "source_crs": {
        "type": "BoundCRS",
        "source_crs": {
            "type": "ProjectedCRS",
            "name": "NAD27 / Alberta 3TM ref merid 117 W",
            "base_crs": {
                "name": "NAD27",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "North American Datum 1927",
                    "ellipsoid": {
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                        "semi_major_axis": 6378206.4,
                        "semi_minor_axis": 6356583.8
                    }
                },
                "coordinate_system": {
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                },
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            },
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                },
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                        "unit": "degree",
                        "id": {
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                    {
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                        }
                    },
                    {
                        "name": "False northing",
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        "target_crs": {
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                "name": "NADCON",
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                    "id": {
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                    }
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                    "name": "Longitude difference file",
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                        "code": 8658
                    }
                }
            ],
            "id": {
                "authority": "EPSG",
                "code": 1241
            }
        }
    },
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        "datum_ensemble": {
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                    "name": "World Geodetic System 1984 (Transit)",
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                    "name": "World Geodetic System 1984 (G1674)",
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                    }
                },
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                    "name": "World Geodetic System 1984 (G1762)",
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                    }
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                    }
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                    "direction": "east",
                    "unit": "degree"
                }
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        },
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}