EPSG:10973

SPCS2022 Gulf Texas Shelf North zone (ft)

Attributes

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 part of Texas CS27 South Central zone. NGS definition in meters has FE=609633.909m FN=166114.095m.

Method: Lambert Conic Conformal (1SP)

Area of use: USA - Gulf OCS - Texas shelf north of approximately 27°48'N - leasing areas Matagorda Island, Brazos, Galveston, High Island; Sabine Pass.

Description: (0,)

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SimpleMap
USA - Gulf OCS - Texas shelf north of approximately 27°48'N - leasing areas Matagorda Island, Brazos, Galveston, High Island; Sabine Pass.

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Definition: OGC Well Known Text

PROJECTION["Lambert_Conformal_Conic_1SP"],
PARAMETER["latitude_of_origin",29.3325],
PARAMETER["central_meridian",-99],
PARAMETER["scale_factor",0.9998499],
PARAMETER["false_easting",609633.909],
PARAMETER["false_northing",166114.095]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["SPCS2022 Gulf Texas Shelf North zone (ft)",
    METHOD["Lambert Conic Conformal (1SP)",
        ID["EPSG",9801]],
    PARAMETER["Latitude of natural origin",29.3325,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-99,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",0.9998499,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",2000111.25,
        LENGTHUNIT["foot",0.3048],
        ID["EPSG",8806]],
    PARAMETER["False northing",544993.75,
        LENGTHUNIT["foot",0.3048],
        ID["EPSG",8807]],
    ID["EPSG",10973]]

Definition: ESRI Well Known Text

PROJECTION["Lambert_Conformal_Conic"],
PARAMETER["False_Easting",609633.909],
PARAMETER["False_Northing",166114.095],
PARAMETER["Central_Meridian",-99.0],
PARAMETER["Standard_Parallel_1",29.3325],
PARAMETER["Scale_Factor",0.9998499],
PARAMETER["Latitude_Of_Origin",29.3325]

Definition: PROJ.4

+proj=lcc +lat_1=29.3325 +lat_0=29.3325 +lon_0=-99 +k_0=0.9998499 +x_0=609633.909 +y_0=166114.095

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:10973","+proj=lcc +lat_1=29.3325 +lat_0=29.3325 +lon_0=-99 +k_0=0.9998499 +x_0=609633.909 +y_0=166114.095");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "SPCS2022 Gulf Texas Shelf North zone (ft)",
    "method": {
        "name": "Lambert Conic Conformal (1SP)",
        "id": {
            "authority": "EPSG",
            "code": 9801
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 29.3325,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -99,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 0.9998499,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 2000111.25,
            "unit": {
                "type": "LinearUnit",
                "name": "foot",
                "conversion_factor": 0.3048
            },
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 544993.75,
            "unit": {
                "type": "LinearUnit",
                "name": "foot",
                "conversion_factor": 0.3048
            },
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 10973
    }
}

Definition: GeoServer

10973=PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",29.3325],PARAMETER["central_meridian",-99],PARAMETER["scale_factor",0.9998499],PARAMETER["false_easting",609633.909],PARAMETER["false_northing",166114.095]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=29.3325"
	"lat_0=29.3325"
	"lon_0=-99"
	"k_0=0.9998499"
	"x_0=609633.909"
	"y_0=166114.095"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=29.3325 +lat_0=29.3325 +lon_0=-99 +k_0=0.9998499 +x_0=609633.909 +y_0=166114.095">
	<Layer srs="+proj=lcc +lat_1=29.3325 +lat_0=29.3325 +lon_0=-99 +k_0=0.9998499 +x_0=609633.909 +y_0=166114.095">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10973, 'EPSG', 10973, '+proj=lcc +lat_1=29.3325 +lat_0=29.3325 +lon_0=-99 +k_0=0.9998499 +x_0=609633.909 +y_0=166114.095', 'PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",29.3325],PARAMETER["central_meridian",-99],PARAMETER["scale_factor",0.9998499],PARAMETER["false_easting",609633.909],PARAMETER["false_northing",166114.095]');