EPSG:10981

NATRF2022 / Gulf Louisiana Shelf (ft)

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Available transformations
to EPSG:4326
No other targets exist for this CRS

  • North America - onshore and offshore , accuracy 1.0 m, code 10969 (default) [3]

Selected transformation

Name: NATRF2022 to WGS 84 (1)

Method: Geocentric translations (geog2D domain)

Remarks: For many purposes NATRF2022 can be considered to be coincident with WGS 84. This approximation ignores the low accuracy of the WGS 84 ensemble and the application of tectonic plate motion to WGS 84 data.

Information source: IOGP

Revision date: 2025-08-11

Attributes

Unit: foot

Geodetic CRS: NATRF2022

Datum: North American Terrestrial Reference Frame of 2022

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: U.S. National Geodetic Survey, https://www.ngs.noaa.gov/

Revision date: 2025-08-11

Scope: Emulation of SPCS27.

Remarks: Emulates offshore area of NAD27 / Louisiana South zone (CRS code 26785) to better than 6 ft. Emulation embeds change of ellipsoid and of unit (ftUS to ft). Note: SPCS2022 CRSs normally have axis order N-E; this emulation of SPCS27 uses SPCS27 order east (X) - north (Y).

Area of use: USA - Gulf OCS - Louisiana shelf - leasing areas Sabine Pass; West Cameron, East Cameron, Vermilion, South Marsh Island, Eugene Island, Ship Shoal, South Pelto, Bay Marchand, South Timbalier, Grand Isle, West Delta, South Pass, Breton Sound, Main Pass, Chandeleur.

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

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SimpleMap

Center coordinates
-3842980.95 10623398.7

Projected bounds:
-27731105.93 -1761380.91
18465417.75 31410728.22

WGS84 bounds:
167.65 23.81
-40.73 86.46

North America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. United States (USA) - Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming
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Definition: OGC Well Known Text

PROJCS["NATRF2022 / Gulf Louisiana Shelf (ft)",
    GEOGCS["NATRF2022",
        DATUM["North_American_Terrestrial_Reference_Frame_of_2022",
            SPHEROID["GRS 1980",6378137,298.257222101],
            TOWGS84[0,0,0,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","10968"]],
    PROJECTION["Lambert_Conformal_Conic_1SP"],
    PARAMETER["latitude_of_origin",30],
    PARAMETER["central_meridian",-91.3333333333333],
    PARAMETER["scale_factor",0.9999165],
    PARAMETER["false_easting",2000033.75],
    PARAMETER["false_northing",484781.25],
    UNIT["foot",0.3048],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","10981"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["NATRF2022 / Gulf Louisiana Shelf (ft)",
    BASEGEOGCRS["NATRF2022",
        DATUM["North American Terrestrial Reference Frame of 2022",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]],
            ANCHOREPOCH[2020]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",10968]],
    CONVERSION["SPCS2022 Gulf Louisiana Shelf zone (ft)",
        METHOD["Lambert Conic Conformal (1SP)",
            ID["EPSG",9801]],
        PARAMETER["Latitude of natural origin",30,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-91.3333333333333,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.9999165,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",2000033.75,
            LENGTHUNIT["foot",0.3048],
            ID["EPSG",8806]],
        PARAMETER["False northing",484781.25,
            LENGTHUNIT["foot",0.3048],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["easting (X)",east,
            ORDER[1],
            LENGTHUNIT["foot",0.3048]],
        AXIS["northing (Y)",north,
            ORDER[2],
            LENGTHUNIT["foot",0.3048]],
    USAGE[
        SCOPE["Emulation of SPCS27."],
        AREA["USA - Gulf OCS - Louisiana shelf - leasing areas Sabine Pass; West Cameron, East Cameron, Vermilion, South Marsh Island, Eugene Island, Ship Shoal, South Pelto, Bay Marchand, South Timbalier, Grand Isle, West Delta, South Pass, Breton Sound, Main Pass, Chandeleur."],
        BBOX[27.82,-93.82,30.02,-87.76]],
    ID["EPSG",10981]]

Definition: ESRI Well Known Text

PROJCS["NATRF2022_Gulf_Louisiana_Shelf_ft",
    GEOGCS["GCS_NATRF2022",
        DATUM["D_North_American_Terrestrial_Reference_Frame_of_2022",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Lambert_Conformal_Conic"],
    PARAMETER["False_Easting",2000033.75],
    PARAMETER["False_Northing",484781.25],
    PARAMETER["Central_Meridian",-91.3333333333333],
    PARAMETER["Standard_Parallel_1",30.0],
    PARAMETER["Scale_Factor",0.9999165],
    PARAMETER["Latitude_Of_Origin",30.0],
    UNIT["foot",0.3048]]

Definition: PROJ.4

+proj=lcc +lat_1=30 +lat_0=30 +lon_0=-91.3333333333333 +k_0=0.9999165 +x_0=609610.287 +y_0=147761.325 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:10981","+proj=lcc +lat_1=30 +lat_0=30 +lon_0=-91.3333333333333 +k_0=0.9999165 +x_0=609610.287 +y_0=147761.325 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "NATRF2022 / Gulf Louisiana Shelf (ft)",
    "base_crs": {
        "type": "GeographicCRS",
        "name": "NATRF2022",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "North American Terrestrial Reference Frame of 2022",
            "anchor_epoch": 2020,
            "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": 10968
        }
    },
    "conversion": {
        "name": "SPCS2022 Gulf Louisiana Shelf zone (ft)",
        "method": {
            "name": "Lambert Conic Conformal (1SP)",
            "id": {
                "authority": "EPSG",
                "code": 9801
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 30,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -91.3333333333333,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 0.9999165,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 2000033.75,
                "unit": {
                    "type": "LinearUnit",
                    "name": "foot",
                    "conversion_factor": 0.3048
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 484781.25,
                "unit": {
                    "type": "LinearUnit",
                    "name": "foot",
                    "conversion_factor": 0.3048
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "X",
                "direction": "east",
                "unit": {
                    "type": "LinearUnit",
                    "name": "foot",
                    "conversion_factor": 0.3048
                }
            },
            {
                "name": "Northing",
                "abbreviation": "Y",
                "direction": "north",
                "unit": {
                    "type": "LinearUnit",
                    "name": "foot",
                    "conversion_factor": 0.3048
                }
            }
        ]
    },
    "scope": "Emulation of SPCS27.",
    "area": "USA - Gulf OCS - Louisiana shelf - leasing areas Sabine Pass; West Cameron, East Cameron, Vermilion, South Marsh Island, Eugene Island, Ship Shoal, South Pelto, Bay Marchand, South Timbalier, Grand Isle, West Delta, South Pass, Breton Sound, Main Pass, Chandeleur.",
    "bbox": {
        "south_latitude": 27.82,
        "west_longitude": -93.82,
        "north_latitude": 30.02,
        "east_longitude": -87.76
    },
    "id": {
        "authority": "EPSG",
        "code": 10981
    }
}

Definition: GeoServer

10981=PROJCS["NATRF2022 / Gulf Louisiana Shelf (ft)",GEOGCS["NATRF2022",DATUM["North_American_Terrestrial_Reference_Frame_of_2022",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","10968"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",-91.3333333333333],PARAMETER["scale_factor",0.9999165],PARAMETER["false_easting",2000033.75],PARAMETER["false_northing",484781.25],UNIT["foot",0.3048],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","10981"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=30"
	"lat_0=30"
	"lon_0=-91.3333333333333"
	"k_0=0.9999165"
	"x_0=609610.287"
	"y_0=147761.325"
	"ellps=GRS80"
	"towgs84=0,0,0,0,0,0,0"
	"units=ft"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=30 +lat_0=30 +lon_0=-91.3333333333333 +k_0=0.9999165 +x_0=609610.287 +y_0=147761.325 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs">
	<Layer srs="+proj=lcc +lat_1=30 +lat_0=30 +lon_0=-91.3333333333333 +k_0=0.9999165 +x_0=609610.287 +y_0=147761.325 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10981, 'EPSG', 10981, '+proj=lcc +lat_1=30 +lat_0=30 +lon_0=-91.3333333333333 +k_0=0.9999165 +x_0=609610.287 +y_0=147761.325 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs', 'PROJCS["NATRF2022 / Gulf Louisiana Shelf (ft)",GEOGCS["NATRF2022",DATUM["North_American_Terrestrial_Reference_Frame_of_2022",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","10968"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",-91.3333333333333],PARAMETER["scale_factor",0.9999165],PARAMETER["false_easting",2000033.75],PARAMETER["false_northing",484781.25],UNIT["foot",0.3048],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","10981"]]');