EPSG:32099

NAD27 / Louisiana Offshore

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: US survey foot

Geodetic CRS: NAD27

Datum: North American Datum 1927

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: OGP

Revision date: 2006-06-12

Scope: No official usage.

Remarks: This system is NOT used for oil industry purposes. Use NAD27 / Louisiana South (CRS code 26782) in state waters and on LA OCS shelf and NAD27 / BLM (CRS codes 32065-66) in OCS deep water protraction areas.

Area of use: United States (USA) - Louisiana.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: ftUS.

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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        BOUNDCRS[
            SOURCECRS[
                BOUNDCRS[
                    SOURCECRS[
                        BOUNDCRS[
                            SOURCECRS[
                                PROJCRS["NAD27 / Louisiana Offshore",
                                    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["Louisiana CS27 Offshore zone",
                                        METHOD["Lambert Conic Conformal (2SP)",
                                            ID["EPSG",9802]],
                                        PARAMETER["Latitude of false origin",25.6666666666667,
                                            ANGLEUNIT["degree",0.0174532925199433],
                                            ID["EPSG",8821]],
                                        PARAMETER["Longitude of false origin",-91.3333333333333,
                                            ANGLEUNIT["degree",0.0174532925199433],
                                            ID["EPSG",8822]],
                                        PARAMETER["Latitude of 1st standard parallel",27.8333333333333,
                                            ANGLEUNIT["degree",0.0174532925199433],
                                            ID["EPSG",8823]],
                                        PARAMETER["Latitude of 2nd standard parallel",26.1666666666667,
                                            ANGLEUNIT["degree",0.0174532925199433],
                                            ID["EPSG",8824]],
                                        PARAMETER["Easting at false origin",2000000,
                                            LENGTHUNIT["US survey foot",0.304800609601219],
                                            ID["EPSG",8826]],
                                        PARAMETER["Northing at false origin",0,
                                            LENGTHUNIT["US survey foot",0.304800609601219],
                                            ID["EPSG",8827]]],
                                    CS[Cartesian,2],
                                        AXIS["easting (X)",east,
                                            ORDER[1],
                                            LENGTHUNIT["US survey foot",0.304800609601219]],
                                        AXIS["northing (Y)",north,
                                            ORDER[2],
                                            LENGTHUNIT["US survey foot",0.304800609601219]],
                                    ID["EPSG",32099]]],
                            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["NAD83(2011)",
                            DATUM["NAD83 (National Spatial Reference System 2011)",
                                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",6318]]],
                    ABRIDGEDTRANSFORMATION["NAD83 to NAD83(2011) (1)",
                        METHOD["Geocentric translations (geog2D domain)",
                            ID["EPSG",9603]],
                        PARAMETER["X-axis translation",0,
                            ID["EPSG",8605]],
                        PARAMETER["Y-axis translation",0,
                            ID["EPSG",8606]],
                        PARAMETER["Z-axis translation",0,
                            ID["EPSG",8607]],
                        ID["EPSG",8971]]]],
            TARGETCRS[
                GEODCRS["ITRF2008",
                    DYNAMIC[
                        FRAMEEPOCH[2005]],
                    DATUM["International Terrestrial Reference Frame 2008",
                        ELLIPSOID["GRS 1980",6378137,298.257222101,
                            LENGTHUNIT["metre",1]]],
                    PRIMEM["Greenwich",0,
                        ANGLEUNIT["degree",0.0174532925199433]],
                    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]],
                    ID["EPSG",5332]]],
            ABRIDGEDTRANSFORMATION["Inverse of ITRF2008 to NAD83(2011) (1)",
                METHOD["Inverse of Time-dependent Coordinate Frame rotation (geocen)",
                    ID["INVERSE(EPSG)",1056]],
                PARAMETER["X-axis translation",0.99343,
                    ID["EPSG",8605]],
                PARAMETER["Y-axis translation",-1.90331,
                    ID["EPSG",8606]],
                PARAMETER["Z-axis translation",-0.52655,
                    ID["EPSG",8607]],
                PARAMETER["X-axis rotation",0.02591467,
                    ID["EPSG",8608]],
                PARAMETER["Y-axis rotation",0.00942645,
                    ID["EPSG",8609]],
                PARAMETER["Z-axis rotation",0.01159935,
                    ID["EPSG",8610]],
                PARAMETER["Scale difference",1.71504,
                    ID["EPSG",8611]],
                PARAMETER["Rate of change of X-axis translation",2.50341244864579E-11,
                    ID["EPSG",1040]],
                PARAMETER["Rate of change of Y-axis translation",-1.90132591036389E-11,
                    ID["EPSG",1041]],
                PARAMETER["Rate of change of Z-axis translation",-4.24629453314602E-11,
                    ID["EPSG",1042]],
                PARAMETER["Rate of change of X-axis rotation",2.11268997406601E-12,
                    ID["EPSG",1043]],
                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,
                    ID["EPSG",1045]],
                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",
            DYNAMIC[
                FRAMEEPOCH[2010]],
            DATUM["International Terrestrial Reference Frame 2014",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            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=lcc +lat_0=25.6666666666667 +lon_0=-91.3333333333333 +lat_1=27.8333333333333 +lat_2=26.1666666666667 +x_0=609601.219202438 +y_0=0 +datum=NAD27 +units=us-ft +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:32099","+proj=lcc +lat_0=25.6666666666667 +lon_0=-91.3333333333333 +lat_1=27.8333333333333 +lat_2=26.1666666666667 +x_0=609601.219202438 +y_0=0 +datum=NAD27 +units=us-ft +no_defs +type=crs");

Definition: JSON

{
    "$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 / Louisiana Offshore",
                    "base_crs": {
                        "name": "NAD27",
                        "datum": {
                            "type": "GeodeticReferenceFrame",
                            "name": "North American Datum 1927",
                            "ellipsoid": {
                                "name": "Clarke 1866",
                                "semi_major_axis": 6378206.4,
                                "semi_minor_axis": 6356583.8
                            }
                        },
                        "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": 4267
                        }
                    },
                    "conversion": {
                        "name": "Louisiana CS27 Offshore zone",
                        "method": {
                            "name": "Lambert Conic Conformal (2SP)",
                            "id": {
                                "authority": "EPSG",
                                "code": 9802
                            }
                        },
                        "parameters": [
                            {
                                "name": "Latitude of false origin",
                                "value": 25.6666666666667,
                                "unit": "degree",
                                "id": {
                                    "authority": "EPSG",
                                    "code": 8821
                                }
                            },
                            {
                                "name": "Longitude of false origin",
                                "value": -91.3333333333333,
                                "unit": "degree",
                                "id": {
                                    "authority": "EPSG",
                                    "code": 8822
                                }
                            },
                            {
                                "name": "Latitude of 1st standard parallel",
                                "value": 27.8333333333333,
                                "unit": "degree",
                                "id": {
                                    "authority": "EPSG",
                                    "code": 8823
                                }
                            },
                            {
                                "name": "Latitude of 2nd standard parallel",
                                "value": 26.1666666666667,
                                "unit": "degree",
                                "id": {
                                    "authority": "EPSG",
                                    "code": 8824
                                }
                            },
                            {
                                "name": "Easting at false origin",
                                "value": 2000000,
                                "unit": {
                                    "type": "LinearUnit",
                                    "name": "US survey foot",
                                    "conversion_factor": 0.304800609601219
                                },
                                "id": {
                                    "authority": "EPSG",
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                                }
                            },
                            {
                                "name": "Northing at false origin",
                                "value": 0,
                                "unit": {
                                    "type": "LinearUnit",
                                    "name": "US survey foot",
                                    "conversion_factor": 0.304800609601219
                                },
                                "id": {
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                                    "code": 8827
                                }
                            }
                        ]
                    },
                    "coordinate_system": {
                        "subtype": "Cartesian",
                        "axis": [
                            {
                                "name": "Easting",
                                "abbreviation": "X",
                                "direction": "east",
                                "unit": {
                                    "type": "LinearUnit",
                                    "name": "US survey foot",
                                    "conversion_factor": 0.304800609601219
                                }
                            },
                            {
                                "name": "Northing",
                                "abbreviation": "Y",
                                "direction": "north",
                                "unit": {
                                    "type": "LinearUnit",
                                    "name": "US survey foot",
                                    "conversion_factor": 0.304800609601219
                                }
                            }
                        ]
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 32099
                    }
                },
                "target_crs": {
                    "type": "GeographicCRS",
                    "name": "NAD83",
                    "datum": {
                        "type": "GeodeticReferenceFrame",
                        "name": "North American Datum 1983",
                        "ellipsoid": {
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                            "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
                    }
                },
                "transformation": {
                    "name": "NAD27 to NAD83 (1)",
                    "method": {
                        "name": "NADCON",
                        "id": {
                            "authority": "EPSG",
                            "code": 9613
                        }
                    },
                    "parameters": [
                        {
                            "name": "Latitude difference file",
                            "value": "conus.las",
                            "id": {
                                "authority": "EPSG",
                                "code": 8657
                            }
                        },
                        {
                            "name": "Longitude difference file",
                            "value": "conus.los",
                            "id": {
                                "authority": "EPSG",
                                "code": 8658
                            }
                        }
                    ],
                    "id": {
                        "authority": "EPSG",
                        "code": 1241
                    }
                }
            },
            "target_crs": {
                "type": "GeographicCRS",
                "name": "NAD83(2011)",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "NAD83 (National Spatial Reference System 2011)",
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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",
                            "unit": "degree"
                        }
                    ]
                },
                "id": {
                    "authority": "EPSG",
                    "code": 6318
                }
            },
            "transformation": {
                "name": "NAD83 to NAD83(2011) (1)",
                "source_crs": {
                    "type": "GeographicCRS",
                    "name": "NAD83",
                    "datum": {
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                        "ellipsoid": {
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                        }
                    },
                    "coordinate_system": {
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                                "name": "Geodetic latitude",
                                "abbreviation": "Lat",
                                "direction": "north",
                                "unit": "degree"
                            },
                            {
                                "name": "Geodetic longitude",
                                "abbreviation": "Lon",
                                "direction": "east",
                                "unit": "degree"
                            }
                        ]
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 4269
                    }
                },
                "method": {
                    "name": "Geocentric translations (geog2D domain)",
                    "id": {
                        "authority": "EPSG",
                        "code": 9603
                    }
                },
                "parameters": [
                    {
                        "name": "X-axis translation",
                        "value": 0,
                        "unit": "metre",
                        "id": {
                            "authority": "EPSG",
                            "code": 8605
                        }
                    },
                    {
                        "name": "Y-axis translation",
                        "value": 0,
                        "unit": "metre",
                        "id": {
                            "authority": "EPSG",
                            "code": 8606
                        }
                    },
                    {
                        "name": "Z-axis translation",
                        "value": 0,
                        "unit": "metre",
                        "id": {
                            "authority": "EPSG",
                            "code": 8607
                        }
                    }
                ],
                "id": {
                    "authority": "EPSG",
                    "code": 8971
                }
            }
        },
        "target_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
                }
            },
            "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": 5332
            }
        },
        "transformation": {
            "name": "Inverse of ITRF2008 to NAD83(2011) (1)",
            "source_crs": {
                "type": "GeodeticCRS",
                "name": "NAD83(2011)",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "NAD83 (National Spatial Reference System 2011)",
                    "ellipsoid": {
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                        "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": 6317
                }
            },
            "method": {
                "name": "Inverse of Time-dependent Coordinate Frame rotation (geocen)",
                "id": {
                    "authority": "INVERSE(EPSG)",
                    "code": 1056
                }
            },
            "parameters": [
                {
                    "name": "X-axis translation",
                    "value": 0.99343,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8605
                    }
                },
                {
                    "name": "Y-axis translation",
                    "value": -1.90331,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8606
                    }
                },
                {
                    "name": "Z-axis translation",
                    "value": -0.52655,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8607
                    }
                },
                {
                    "name": "X-axis rotation",
                    "value": 25.91467,
                    "unit": {
                        "type": "AngularUnit",
                        "name": "milliarc-second",
                        "conversion_factor": 4.84813681109536e-09
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8608
                    }
                },
                {
                    "name": "Y-axis rotation",
                    "value": 9.42645,
                    "unit": {
                        "type": "AngularUnit",
                        "name": "milliarc-second",
                        "conversion_factor": 4.84813681109536e-09
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8609
                    }
                },
                {
                    "name": "Z-axis rotation",
                    "value": 11.59935,
                    "unit": {
                        "type": "AngularUnit",
                        "name": "milliarc-second",
                        "conversion_factor": 4.84813681109536e-09
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8610
                    }
                },
                {
                    "name": "Scale difference",
                    "value": 1.71504,
                    "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": 0.00079,
                    "unit": {
                        "type": "LinearUnit",
                        "name": "metres per year",
                        "conversion_factor": 3.16887651727315e-08
                    },
                    "id": {
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}

Definition: MapServer - MAPfile

PROJECTION
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	"lat_0=25.6666666666667"
	"lon_0=-91.3333333333333"
	"lat_1=27.8333333333333"
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	"y_0=0"
	"datum=NAD27"
	"units=us-ft"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

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