EPSG:10971

SPCS2022 Gulf zone (ft)

Attributes

Data source: EPSG

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

Revision date: 2025-08-11

Scope: Engineering survey, topographic mapping.

Remarks: See code 10970 for equivalent metric definition.

Method: Lambert Conic Conformal (1SP)

Area of use: United States (USA) - offshore Gulf of Mexico outer continental shelf (GoM OCS) - protraction areas South Padre Island; North Padre Island; Mustang Island; Matagorda Island; Brazos; Galveston; High Island; 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; Main Pass; Breton Sound; Chandeleur; Corpus Christi; Port Isabel; East Breaks; Alaminos Canyon; Garden Banks; Keathley Canyon; Sigsbee Escarpment; Ewing Bank; Green Canyon; Walker Ridge; Amery Terrace; Mobile; Viosca Knoll; Mississippi Canyon; Atwater Valley; Lund; Lund South; Pensacola; Destin Dome; De Soto Canyon; Lloyd Ridge; Henderson; Florida Plain; Campeche Escarpment; Apalachicola; Florida Middle Ground; The Elbow; Vernon Basin; Howell Hook; Rankin; Gainesville; Tarpon Springs; St Petersburg; Charlotte Harbor; Pulley Ridge; Dry Tortugas; Tortugas Valley; Miami; Key West.

Description: (0,)

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SimpleMap
United States (USA) - offshore Gulf of Mexico outer continental shelf (GoM OCS) - protraction areas South Padre Island; North Padre Island; Mustang Island; Matagorda Island; Brazos; Galveston; High Island; 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; Main Pass; Breton Sound; Chandeleur; Corpus Christi; Port Isabel; East Breaks; Alaminos Canyon; Garden Banks; Keathley Canyon; Sigsbee Escarpment; Ewing Bank; Green Canyon; Walker Ridge; Amery Terrace; Mobile; Viosca Knoll; Mississippi Canyon; Atwater Valley; Lund; Lund South; Pensacola; Destin Dome; De Soto Canyon; Lloyd Ridge; Henderson; Florida Plain; Campeche Escarpment; Apalachicola; Florida Middle Ground; The Elbow; Vernon Basin; Howell Hook; Rankin; Gainesville; Tarpon Springs; St Petersburg; Charlotte Harbor; Pulley Ridge; Dry Tortugas; Tortugas Valley; Miami; Key West.

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Definition: OGC Well Known Text

PROJECTION["Lambert_Conformal_Conic_1SP"],
PARAMETER["latitude_of_origin",28],
PARAMETER["central_meridian",-90],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",1600200],
PARAMETER["false_northing",533400]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["SPCS2022 Gulf zone (ft)",
    METHOD["Lambert Conic Conformal (1SP)",
        ID["EPSG",9801]],
    PARAMETER["Latitude of natural origin",28,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-90,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",0.9996,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",5250000,
        LENGTHUNIT["foot",0.3048],
        ID["EPSG",8806]],
    PARAMETER["False northing",1750000,
        LENGTHUNIT["foot",0.3048],
        ID["EPSG",8807]],
    ID["EPSG",10971]]

Definition: ESRI Well Known Text

PROJECTION["Lambert_Conformal_Conic"],
PARAMETER["False_Easting",1600200.0],
PARAMETER["False_Northing",533400.0],
PARAMETER["Central_Meridian",-90.0],
PARAMETER["Standard_Parallel_1",28.0],
PARAMETER["Scale_Factor",0.9996],
PARAMETER["Latitude_Of_Origin",28.0]

Definition: PROJ.4

+proj=lcc +lat_1=28 +lat_0=28 +lon_0=-90 +k_0=0.9996 +x_0=1600200 +y_0=533400

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:10971","+proj=lcc +lat_1=28 +lat_0=28 +lon_0=-90 +k_0=0.9996 +x_0=1600200 +y_0=533400");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "SPCS2022 Gulf zone (ft)",
    "method": {
        "name": "Lambert Conic Conformal (1SP)",
        "id": {
            "authority": "EPSG",
            "code": 9801
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 28,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -90,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 0.9996,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 5250000,
            "unit": {
                "type": "LinearUnit",
                "name": "foot",
                "conversion_factor": 0.3048
            },
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 1750000,
            "unit": {
                "type": "LinearUnit",
                "name": "foot",
                "conversion_factor": 0.3048
            },
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 10971
    }
}

Definition: GeoServer

10971=PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",28],PARAMETER["central_meridian",-90],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",1600200],PARAMETER["false_northing",533400]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=28"
	"lat_0=28"
	"lon_0=-90"
	"k_0=0.9996"
	"x_0=1600200"
	"y_0=533400"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=28 +lat_0=28 +lon_0=-90 +k_0=0.9996 +x_0=1600200 +y_0=533400">
	<Layer srs="+proj=lcc +lat_1=28 +lat_0=28 +lon_0=-90 +k_0=0.9996 +x_0=1600200 +y_0=533400">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10971, 'EPSG', 10971, '+proj=lcc +lat_1=28 +lat_0=28 +lon_0=-90 +k_0=0.9996 +x_0=1600200 +y_0=533400', 'PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",28],PARAMETER["central_meridian",-90],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",1600200],PARAMETER["false_northing",533400]');