EPSG:3773

NAD27 / Alberta 3TM ref merid 117 W

Selected transformation

Grid Files: conus.las conus.los

Remarks: For use with legacy data - see CT code 9104 for alternative for new areas. Note that steps 1 and 2 are documented in the geog2D domain, steps 3 and 4 in the geocentric domain. Steps 3 and 4 may be implemented in one operation using CT code 8970.

Information source: IOGP

Revision date: 2019-06-13

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[
                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[
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                                        ELLIPSOID["GRS 1980",6378137,298.257222101,
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                                    PRIMEM["Greenwich",0,
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                                        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]]]],
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                                AXIS["geodetic longitude (Lon)",east,
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                                    ANGLEUNIT["degree",0.0174532925199433]],
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                    ABRIDGEDTRANSFORMATION["NAD83 to NAD83(2011) (1)",
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                        PARAMETER["Y-axis translation",0,
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                        PARAMETER["Z-axis translation",0,
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                    PRIMEM["Greenwich",0,
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                        AXIS["(X)",geocentricX,
                            ORDER[1],
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                        AXIS["(Y)",geocentricY,
                            ORDER[2],
                            LENGTHUNIT["metre",1]],
                        AXIS["(Z)",geocentricZ,
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                            LENGTHUNIT["metre",1]],
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            ABRIDGEDTRANSFORMATION["Inverse of ITRF2008 to NAD83(2011) (1)",
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                PARAMETER["X-axis translation",0.99343,
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                PARAMETER["Y-axis translation",-1.90331,
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                PARAMETER["Z-axis translation",-0.52655,
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                PARAMETER["X-axis rotation",0.02591467,
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                PARAMETER["Y-axis rotation",0.00942645,
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                PARAMETER["Z-axis rotation",0.01159935,
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                PARAMETER["Scale difference",1.71504,
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                PARAMETER["Rate of change of X-axis translation",2.50341244864579E-11,
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                PARAMETER["Rate of change of Y-axis translation",-1.90132591036389E-11,
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                PARAMETER["Rate of change of Z-axis translation",-4.24629453314602E-11,
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                PARAMETER["Rate of change of X-axis rotation",2.11268997406601E-12,
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                PARAMETER["Rate of change of Y-axis rotation",-2.40023382924337E-11,
                    ID["EPSG",1044]],
                PARAMETER["Rate of change of Z-axis rotation",-1.62658431631631E-12,
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                PARAMETER["Rate of change of Scale difference",-0.10201,
                    ID["EPSG",1046]],
                PARAMETER["Parameter reference epoch",1997,
                    ID["EPSG",1047]],
                ID["INVERSE(EPSG)",7807]]]],
    TARGETCRS[
        GEODCRS["ITRF2014",
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                FRAMEEPOCH[2010]],
            DATUM["International Terrestrial Reference Frame 2014",
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            PRIMEM["Greenwich",0,
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            CS[Cartesian,3],
                AXIS["(X)",geocentricX,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(Y)",geocentricY,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
                AXIS["(Z)",geocentricZ,
                    ORDER[3],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Geodesy."],
                AREA["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",7789]]],
    ABRIDGEDTRANSFORMATION["ITRF2008 to ITRF2014 (1)",
        METHOD["Time-dependent Position Vector tfm (geocentric)",
            ID["EPSG",1053]],
        PARAMETER["X-axis translation",-0.0016,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",-0.0019,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",-0.0024,
            ID["EPSG",8607]],
        PARAMETER["X-axis rotation",0,
            ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",0,
            ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",0,
            ID["EPSG",8610]],
        PARAMETER["Scale difference",0.02,
            ID["EPSG",8611]],
        PARAMETER["Rate of change of X-axis translation",0,
            ID["EPSG",1040]],
        PARAMETER["Rate of change of Y-axis translation",0,
            ID["EPSG",1041]],
        PARAMETER["Rate of change of Z-axis translation",3.16887651727315E-12,
            ID["EPSG",1042]],
        PARAMETER["Rate of change of X-axis rotation",0,
            ID["EPSG",1043]],
        PARAMETER["Rate of change of Y-axis rotation",0,
            ID["EPSG",1044]],
        PARAMETER["Rate of change of Z-axis rotation",0,
            ID["EPSG",1045]],
        PARAMETER["Rate of change of Scale difference",-0.03,
            ID["EPSG",1046]],
        PARAMETER["Parameter reference epoch",2010,
            ID["EPSG",1047]],
        USAGE[
            SCOPE["Geodesy."],
            AREA["World."],
            BBOX[-90,-180,90,180]],
        ID["EPSG",7790],
        REMARK["Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9 or nm/m. Estimated using 127 stations at 125 sites."]]]

Definition: PROJ.4

+proj=tmerc +lat_0=0 +lon_0=-117 +k=0.9999 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:3773","+proj=tmerc +lat_0=0 +lon_0=-117 +k=0.9999 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs");

Definition: JSON

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    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "BoundCRS",
        "source_crs": {
            "type": "BoundCRS",
            "source_crs": {
                "type": "BoundCRS",
                "source_crs": {
                    "type": "ProjectedCRS",
                    "name": "NAD27 / Alberta 3TM ref merid 117 W",
                    "base_crs": {
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                            "name": "North American Datum 1927",
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                                "semi_major_axis": 6378206.4,
                                "semi_minor_axis": 6356583.8
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                        "coordinate_system": {
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                                    "name": "Geodetic latitude",
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                                    "unit": "degree"
                                },
                                {
                                    "name": "Geodetic longitude",
                                    "abbreviation": "Lon",
                                    "direction": "east",
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                        },
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                    },
                    "conversion": {
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                            "id": {
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                        },
                        "parameters": [
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                "transformation": {
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                    "parameters": [
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                        },
                        {
                            "name": "Longitude difference file",
                            "value": "conus.los",
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            },
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        "target_crs": {
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                {
                    "name": "Rate of change of Y-axis rotation",
                    "value": -0.75744,
                    "unit": {
                        "type": "AngularUnit",
                        "name": "milliarc-seconds per year",
                        "conversion_factor": 1.53631468932076e-16
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 1044
                    }
                },
                {
                    "name": "Rate of change of Z-axis rotation",
                    "value": -0.05133,
                    "unit": {
                        "type": "AngularUnit",
                        "name": "milliarc-seconds per year",
                        "conversion_factor": 1.53631468932076e-16
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 1045
                    }
                },
                {
                    "name": "Rate of change of Scale difference",
                    "value": -0.10201,
                    "unit": {
                        "type": "ScaleUnit",
                        "name": "parts per billion per year",
                        "conversion_factor": 3.16887651727315e-17
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 1046
                    }
                },
                {
                    "name": "Parameter reference epoch",
                    "value": 1997,
                    "unit": {
                        "type": "TimeUnit",
                        "name": "year",
                        "conversion_factor": 31556925.445
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 1047
                    }
                }
            ],
            "id": {
                "authority": "INVERSE(EPSG)",
                "code": 7807
            }
        }
    },
    "target_crs": {
        "type": "GeodeticCRS",
        "name": "ITRF2014",
        "datum": {
            "type": "DynamicGeodeticReferenceFrame",
            "name": "International Terrestrial Reference Frame 2014",
            "frame_reference_epoch": 2010,
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Geocentric X",
                    "abbreviation": "X",
                    "direction": "geocentricX",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Y",
                    "abbreviation": "Y",
                    "direction": "geocentricY",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Z",
                    "abbreviation": "Z",
                    "direction": "geocentricZ",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7789
        }
    },
    "transformation": {
        "name": "ITRF2008 to ITRF2014 (1)",
        "source_crs": {
            "type": "GeodeticCRS",
            "name": "ITRF2008",
            "datum": {
                "type": "DynamicGeodeticReferenceFrame",
                "name": "International Terrestrial Reference Frame 2008",
                "frame_reference_epoch": 2005,
                "ellipsoid": {
                    "name": "GRS 1980",
                    "semi_major_axis": 6378137,
                    "inverse_flattening": 298.257222101
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            },
            "coordinate_system": {
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                "axis": [
                    {
                        "name": "Geocentric X",
                        "abbreviation": "X",
                        "direction": "geocentricX",
                        "unit": "metre"
                    },
                    {
                        "name": "Geocentric Y",
                        "abbreviation": "Y",
                        "direction": "geocentricY",
                        "unit": "metre"
                    },
                    {
                        "name": "Geocentric Z",
                        "abbreviation": "Z",
                        "direction": "geocentricZ",
                        "unit": "metre"
                    }
                ]
            },
            "id": {
                "authority": "EPSG",
                "code": 5332
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        },
        "method": {
            "name": "Time-dependent Position Vector tfm (geocentric)",
            "id": {
                "authority": "EPSG",
                "code": 1053
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        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": -1.6,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetre",
                    "conversion_factor": 0.001
                },
                "id": {
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            },
            {
                "name": "Y-axis translation",
                "value": -1.9,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetre",
                    "conversion_factor": 0.001
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                "id": {
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            },
            {
                "name": "Z-axis translation",
                "value": -2.4,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetre",
                    "conversion_factor": 0.001
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            },
            {
                "name": "X-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-second",
                    "conversion_factor": 4.84813681109536e-09
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8608
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            },
            {
                "name": "Y-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-second",
                    "conversion_factor": 4.84813681109536e-09
                },
                "id": {
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            },
            {
                "name": "Z-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-second",
                    "conversion_factor": 4.84813681109536e-09
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                "id": {
                    "authority": "EPSG",
                    "code": 8610
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            },
            {
                "name": "Scale difference",
                "value": 0.02,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per billion",
                    "conversion_factor": 1e-09
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8611
                }
            },
            {
                "name": "Rate of change of X-axis translation",
                "value": 0,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetres per year",
                    "conversion_factor": 3.16887651727315e-11
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1040
                }
            },
            {
                "name": "Rate of change of Y-axis translation",
                "value": 0,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetres per year",
                    "conversion_factor": 3.16887651727315e-11
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1041
                }
            },
            {
                "name": "Rate of change of Z-axis translation",
                "value": 0.1,
                "unit": {
                    "type": "LinearUnit",
                    "name": "millimetres per year",
                    "conversion_factor": 3.16887651727315e-11
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1042
                }
            },
            {
                "name": "Rate of change of X-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-seconds per year",
                    "conversion_factor": 1.53631468932076e-16
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1043
                }
            },
            {
                "name": "Rate of change of Y-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-seconds per year",
                    "conversion_factor": 1.53631468932076e-16
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1044
                }
            },
            {
                "name": "Rate of change of Z-axis rotation",
                "value": 0,
                "unit": {
                    "type": "AngularUnit",
                    "name": "milliarc-seconds per year",
                    "conversion_factor": 1.53631468932076e-16
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1045
                }
            },
            {
                "name": "Rate of change of Scale difference",
                "value": -0.03,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per billion per year",
                    "conversion_factor": 3.16887651727315e-17
                },
                "id": {
                    "authority": "EPSG",
                    "code": 1046
                }
            },
            {
                "name": "Parameter reference epoch",
                "value": 2010,
                "unit": {
                    "type": "TimeUnit",
                    "name": "year",
                    "conversion_factor": 31556925.445
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                "id": {
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                    "code": 1047
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 7790
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=0"
	"lon_0=-117"
	"k=0.9999"
	"x_0=0"
	"y_0=0"
	"datum=NAD27"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=0 +lon_0=-117 +k=0.9999 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=0 +lon_0=-117 +k=0.9999 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs">
	</Layer>
</Map>