EPSG:9747

SPCS83 Alabama West zone (US survey foot)

Attributes

Data source: EPSG

Information source: Alabama Department of Transportation (ALDOT), Manual on Survey Requirements.

Revision date: 2023-11-22

Scope: Engineering survey, topographic mapping.

Remarks: This map projection is not formally recognised by the NGS because there is no State legislation for NAD83 defining the foot to be used. See code 10132 for official metric definition. ftUS required by AL DOT and used by other professional practioners.

Method: Transverse Mercator

Area of use: United States (USA) - Alabama west of approximately 86°37'W - counties Autauga; Baldwin; Bibb; Blount; Butler; Chilton; Choctaw; Clarke; Colbert; Conecuh; Cullman; Dallas; Escambia; Fayette; Franklin; Greene; Hale; Jefferson; Lamar; Lauderdale; Lawrence; Limestone; Lowndes; Marengo; Marion; Mobile; Monroe; Morgan; Perry; Pickens; Shelby; Sumter; Tuscaloosa; Walker; Washington; Wilcox; Winston.

Description: (0,)

Covered area powered by MapTiler MapTiler logo
SimpleMap
United States (USA) - Alabama west of approximately 86°37'W - counties Autauga; Baldwin; Bibb; Blount; Butler; Chilton; Choctaw; Clarke; Colbert; Conecuh; Cullman; Dallas; Escambia; Fayette; Franklin; Greene; Hale; Jefferson; Lamar; Lauderdale; Lawrence; Limestone; Lowndes; Marengo; Marion; Mobile; Monroe; Morgan; Perry; Pickens; Shelby; Sumter; Tuscaloosa; Walker; Washington; Wilcox; Winston.

MapTiler banner

Definition: OGC Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",30],
PARAMETER["central_meridian",-87.5],
PARAMETER["scale_factor",0.999933333],
PARAMETER["false_easting",600000],
PARAMETER["false_northing",0]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["SPCS83 Alabama West zone (US survey foot)",
    METHOD["Transverse Mercator",
        ID["EPSG",9807]],
    PARAMETER["Latitude of natural origin",30,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-87.5,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",0.999933333,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",1968500,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8806]],
    PARAMETER["False northing",0,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8807]],
    ID["EPSG",9747]]

Definition: ESRI Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",600000.0],
PARAMETER["False_Northing",0.0],
PARAMETER["Central_Meridian",-87.5],
PARAMETER["Scale_Factor",0.999933333],
PARAMETER["Latitude_Of_Origin",30.0]

Definition: PROJ.4

+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:9747","+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "SPCS83 Alabama West zone (US survey foot)",
    "method": {
        "name": "Transverse Mercator",
        "id": {
            "authority": "EPSG",
            "code": 9807
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 30,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -87.5,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 0.999933333,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 1968500,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 0,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 9747
    }
}

Definition: GeoServer

9747=PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",-87.5],PARAMETER["scale_factor",0.999933333],PARAMETER["false_easting",600000],PARAMETER["false_northing",0]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=30"
	"lon_0=-87.5"
	"k=0.999933333"
	"x_0=600000"
	"y_0=0"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0">
	<Layer srs="+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9747, 'EPSG', 9747, '+proj=tmerc +lat_0=30 +lon_0=-87.5 +k=0.999933333 +x_0=600000 +y_0=0', 'PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",-87.5],PARAMETER["scale_factor",0.999933333],PARAMETER["false_easting",600000],PARAMETER["false_northing",0]');