EPSG:18081

Lambert zone I

Attributes

Data source: EPSG

Information source: IGN Paris.

Revision date: 2003-01-16

Scope: Engineering survey, topographic mapping.

Remarks: Longitude is referenced to the Paris meridian. Introduced 1972. Replaces Lambert Nord France (code 18091).

Method: Lambert Conic Conformal (1SP)

Area of use: France mainland onshore north of 53.5 grads North (48°09'N).

Description: (0,)

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Definition: OGC Well Known Text

PROJECTION["Lambert_Conformal_Conic_1SP"],
PARAMETER["latitude_of_origin",49.5],
PARAMETER["central_meridian",0],
PARAMETER["scale_factor",0.999877341],
PARAMETER["false_easting",600000],
PARAMETER["false_northing",1200000]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["Lambert zone I",
    METHOD["Lambert Conic Conformal (1SP)",
        ID["EPSG",9801]],
    PARAMETER["Latitude of natural origin",55,
        ANGLEUNIT["grad",0.0157079632679489],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",0,
        ANGLEUNIT["grad",0.0157079632679489],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",0.999877341,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",600000,
        LENGTHUNIT["metre",1],
        ID["EPSG",8806]],
    PARAMETER["False northing",1200000,
        LENGTHUNIT["metre",1],
        ID["EPSG",8807]],
    ID["EPSG",18081]]

Definition: ESRI Well Known Text

PROJECTION["Lambert_Conformal_Conic"],
PARAMETER["False_Easting",600000.0],
PARAMETER["False_Northing",1200000.0],
PARAMETER["Central_Meridian",0.0],
PARAMETER["Standard_Parallel_1",49.5],
PARAMETER["Scale_Factor",0.999877341],
PARAMETER["Latitude_Of_Origin",49.5]

Definition: PROJ.4

+proj=lcc +lat_1=49.5 +lat_0=49.5 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=1200000

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:18081","+proj=lcc +lat_1=49.5 +lat_0=49.5 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=1200000");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json",
    "type": "Conversion",
    "name": "Lambert zone I",
    "method": {
        "name": "Lambert Conic Conformal (1SP)",
        "id": {
            "authority": "EPSG",
            "code": 9801
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 55,
            "unit": {
                "type": "AngularUnit",
                "name": "grad",
                "conversion_factor": 0.0157079632679489
            },
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": 0,
            "unit": {
                "type": "AngularUnit",
                "name": "grad",
                "conversion_factor": 0.0157079632679489
            },
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 0.999877341,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 600000,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 1200000,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 18081
    }
}

Definition: GeoServer

18081=PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",49.5],PARAMETER["central_meridian",0],PARAMETER["scale_factor",0.999877341],PARAMETER["false_easting",600000],PARAMETER["false_northing",1200000]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=49.5"
	"lat_0=49.5"
	"lon_0=0"
	"k_0=0.999877341"
	"x_0=600000"
	"y_0=1200000"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=49.5 +lat_0=49.5 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=1200000">
	<Layer srs="+proj=lcc +lat_1=49.5 +lat_0=49.5 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=1200000">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 18081, 'EPSG', 18081, '+proj=lcc +lat_1=49.5 +lat_0=49.5 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=1200000', 'PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",49.5],PARAMETER["central_meridian",0],PARAMETER["scale_factor",0.999877341],PARAMETER["false_easting",600000],PARAMETER["false_northing",1200000]');